Fix: latitude, longitude format

.gitignore

@@ -1,5 +1,4 @@
 out/
-Makefile
 go.sum
 .git/
 *.swp

Makefile

@@ -0,0 +1,7 @@
+export GOOS=linux
+export GOARCH=arm
+export GOARM=6
+export CGO_ENABLED=0
+
+build:
+	@go build -o out/out main.go

api/modem/at/at.go

@@ -4,6 +4,7 @@ import (
 	"fmt"
 	"io"
 	"log"
+	"sync"
 	"time"
 
 	"go.bug.st/serial"
@@ -12,12 +13,14 @@ import (
 // Some constants
 const (
 	ReadTimeout  = time.Second
-	InputBufSize = 128
+	InputBufSize = 512
 )
 
 type atPort struct {
 	logger *log.Logger
 
+	mutex sync.Mutex // Mutex for all operation with serial port
+
 	baudrate int
 	portName string
 	port     serial.Port
@@ -27,14 +30,17 @@ type atPort struct {
 type Port interface {
 	GetName() string
 	GetBaudrate() int
-	GetSerialPort() serial.Port // For extra need
+	SerialPort() serial.Port // For extra need
+	Mutex() sync.Locker      // retruns pointer to mutex for advanced use like readign NMEA reports
 
 	Connect() error
 	Disconnect() error
 	IsConnected() bool
 
-	RawSend(msg string) (string, error)
+	RawSend(msg string) error
+	RawRead(timeout time.Duration) (string, error)
 	Send(cmd string) (Resp, error)
+	SendWithTimeout(cmd string, timeout time.Duration) (Resp, error)
 
 	io.Closer
 }
@@ -56,11 +62,18 @@ func (p *atPort) GetBaudrate() int {
 	return p.baudrate
 }
 
-func (p *atPort) GetSerialPort() serial.Port {
+func (p *atPort) SerialPort() serial.Port {
 	return p.port
 }
 
+func (p *atPort) Mutex() sync.Locker {
+	return &p.mutex
+}
+
 func (p *atPort) Connect() error {
+	p.mutex.Lock()
+	defer p.mutex.Unlock()
+
 	p.logger.Println("Connecting to", p.portName, "...")
 	s, err := serial.Open(p.portName, &serial.Mode{BaudRate: p.baudrate})
 	if err != nil {
@@ -76,8 +89,10 @@ func (p *atPort) Connect() error {
 }
 
 func (p *atPort) Disconnect() error {
+	p.mutex.Lock()
 	defer func() {
 		p.port = nil
+		p.mutex.Unlock()
 	}()
 	if err := p.port.Close(); err != nil {
 		return fmt.Errorf("close port: %w", err)
@@ -86,34 +101,79 @@ func (p *atPort) Disconnect() error {
 }
 
 func (p *atPort) IsConnected() bool {
+	p.mutex.Lock()
+	defer p.mutex.Unlock()
+
 	return p.port != nil
 }
 
+func (p *atPort) RawRead(timeout time.Duration) (string, error) {
+	p.mutex.Lock()
+	defer p.mutex.Unlock()
+
+	deadline := time.Now().Add(timeout)
+	outBuf := make([]byte, 0)
+
+readLoop:
+	for {
+		readLen, err := p.port.Read(p.inputBuf)
+		if err != nil {
+			return "", fmt.Errorf("port read: %w", err)
+		}
+		if readLen == 0 && time.Now().After(deadline) {
+			break readLoop
+		}
+		outBuf = append(outBuf, p.inputBuf[:readLen]...)
+		// if readLen < len(p.inputBuf) {
+		// 	break readLoop
+		// }
+	}
+	// p.logger.Println(msg, "\x1b[38;2;150;150;150mRAWREAD:", string(outBuf), "\x1b[38;2;255;255;255m")
+	return string(outBuf), nil
+}
+
 // Low level write/read function
-func (p *atPort) RawSend(msg string) (string, error) {
+func (p *atPort) RawSend(msg string) error {
+	p.mutex.Lock()
+	defer p.mutex.Unlock()
+
 	// Write
 	if _, err := p.port.Write([]byte(msg)); err != nil {
-		return "", fmt.Errorf("serial port write: %w", err)
+		return fmt.Errorf("serial port write: %w", err)
 	}
-	time.Sleep(time.Millisecond)
+	return nil
-	// Read
-	readLen, err := p.port.Read(p.inputBuf)
-	// p.logger.Println(msg, "\x1b[38;2;150;150;150mRAWREAD:", string(p.inputBuf[:readLen]), "\x1b[38;2;255;255;255m")
-	if err != nil {
-		return "", fmt.Errorf("port read: %w", err)
-	}
-
-	return string(p.inputBuf[:readLen]), nil
 }
 
 func (p *atPort) Send(cmd string) (Resp, error) {
-	cmd += "\r\n"
+	err := p.RawSend(cmd + "\r\n")
-	rawResp, err := p.RawSend(cmd)
 	if err != nil {
-		return RespNil, fmt.Errorf("make request: %w", err)
+		return RespNil, fmt.Errorf("%s request: %w", cmd, err)
 	}
+	rawResp, err := p.RawRead(ReadTimeout)
+	if err != nil {
+		return RespNil, fmt.Errorf("%s request: %w", cmd, err)
+	}
+
 	if len(rawResp) <= 4 {
-		return RespNil, fmt.Errorf("read too small msg: %d byte - %s", len(rawResp), string(rawResp))
+		return RespNil, fmt.Errorf("%s request: read too small msg: %d byte - %s", cmd, len(rawResp), string(rawResp))
+	}
+	resp := rawResp[2 : len(rawResp)-2] // Cut \r\n
+
+	return Resp(resp), nil
+}
+
+func (p *atPort) SendWithTimeout(cmd string, timeout time.Duration) (Resp, error) {
+	err := p.RawSend(cmd + "\r\n")
+	if err != nil {
+		return RespNil, fmt.Errorf("%s request: %w", cmd, err)
+	}
+	rawResp, err := p.RawRead(timeout)
+	if err != nil {
+		return RespNil, fmt.Errorf("%s request: %w", cmd, err)
+	}
+
+	if len(rawResp) <= 4 {
+		return RespNil, fmt.Errorf("%s request: read too small msg: %d byte - %s", cmd, len(rawResp), string(rawResp))
 	}
 	resp := rawResp[2 : len(rawResp)-2] // Cut \r\n
 
@@ -121,5 +181,8 @@ func (p *atPort) Send(cmd string) (Resp, error) {
 }
 
 func (p *atPort) Close() error {
+	p.mutex.Lock()
+	defer p.mutex.Unlock()
+
 	return p.port.Close()
 }

api/modem/at/response.go

@@ -12,6 +12,10 @@ func (resp Resp) RmFront(str string) Resp {
 	return Resp(string(resp)[len(str):])
 }
 
+func (resp Resp) CheckFront(str string) bool {
+	return len(resp) >= len(str) && resp[:len(str)].String() == str
+}
+
 func (resp Resp) String() string {
 	return string(resp)
 }

api/modem/gpio/gpio.go

@@ -1,6 +1,7 @@
 package gpio
 
 import (
+	"context"
 	"io"
 	"log"
 	"time"
@@ -8,6 +9,10 @@ import (
 	gpio "github.com/stianeikeland/go-rpio/v4"
 )
 
+const (
+	waitCtxTimeout = 100 * time.Microsecond
+)
+
 type gpioPin struct {
 	logger *log.Logger
 	pin    gpio.Pin
@@ -16,7 +21,7 @@ type gpioPin struct {
 type Pin interface {
 	Init() error
 	PowerOn()
-	PowerOff()
+	PowerOnCtx(ctx context.Context)
 	io.Closer
 }
 
@@ -31,32 +36,47 @@ func (p gpioPin) Init() error {
 	return gpio.Open()
 }
 
-func (p gpioPin) sendOnOffSignal() {
+func waitCtx(ctx context.Context, timeout time.Duration) {
+	deadline := time.Now().Add(timeout)
+	for {
+		select {
+		case <-ctx.Done():
+			return
+		default:
+			if time.Now().After(deadline) {
+				return
+			}
+		}
+		time.Sleep(waitCtxTimeout)
+	}
+}
+
+func (p gpioPin) sendOnOffSignal(ctx context.Context) {
 	p.pin.Output()
 	p.logger.Println("Power on 0/3 + 100ms")
 	p.pin.Low()
 	p.pin.Toggle()
-	time.Sleep(100 * time.Millisecond)
+	waitCtx(ctx, 100*time.Millisecond)
 
 	p.logger.Println("Power on 1/3 + 3s")
 	p.pin.High()
 	p.pin.Toggle()
-	time.Sleep(3 * time.Second)
+	waitCtx(ctx, 3*time.Second)
 
 	p.logger.Println("Power on 2/3 + 30s")
 	p.pin.Low()
 	p.pin.Toggle()
-	time.Sleep(30 * time.Second)
+	waitCtx(ctx, 30*time.Second)
 
 	p.logger.Println("Power on 3/3")
 }
 
 func (p gpioPin) PowerOn() {
-	p.sendOnOffSignal()
+	p.sendOnOffSignal(context.Background())
 }
 
-func (p gpioPin) PowerOff() {
+func (p gpioPin) PowerOnCtx(ctx context.Context) {
-	p.sendOnOffSignal()
+	p.sendOnOffSignal(ctx)
 }
 
 func (p gpioPin) Close() error {

api/modem/gps.go

@@ -1,137 +0,0 @@
-package modem
-
-import (
-	"fmt"
-	"math"
-	"strconv"
-	"strings"
-	"time"
-
-	"github.com/CGSG-2021-AE4/modem-test/api/modem/at"
-)
-
-type GpsData struct {
-	Latitude           float64 `json:"Latitude"`
-	Longitude          float64 `json:"Longitude"`
-	LatitudeIndicator  string  `json:"Latitude_indicator"`  // North/South
-	LongitudeIndicator string  `json:"Longitude_indicator"` // West/East
-	Speed              float64 `json:"Speed"`
-	Course             float64 `json:"-"`
-	Altitude           float64 `json:"-"`
-	Date               string  `json:"-"`
-	Time               string  `json:"-"`
-}
-
-var GpsInfoNil = GpsData{}
-
-func deg2rad(deg float64) float64 {
-	return deg * (math.Pi / 180)
-}
-
-func (gps *GpsData) calculateSpeed(newLatitude, newLongitude float64, lastUpdateTime time.Time) {
-	earthRad := 6371.0 // TODO ?
-	dLat := deg2rad(math.Abs(newLatitude - gps.Latitude))
-	dLon := deg2rad(math.Abs(newLongitude - gps.Longitude))
-	a := math.Sin(dLat/2)*math.Sin(dLat/2) +
-		math.Cos(deg2rad(newLatitude))*math.Cos(deg2rad(gps.Latitude))*math.Sin(dLon/2)*math.Sin(dLon/2)
-	c := 2 * math.Atan2(math.Sqrt(a), math.Sqrt(1-a))
-
-	gps.Speed = earthRad * c / (math.Abs(float64(time.Since(lastUpdateTime))))
-}
-
-// Parse string from AT command that contains gps data
-func (gps *GpsData) decode(str string) error {
-	var err error
-	newGpsInfo := GpsData{}
-	strs := strings.Split(strings.Split(strings.Replace(str, " ", "", -1), "\n")[0], ",")
-
-	newGpsInfo.Latitude, err = strconv.ParseFloat(strs[0], 64)
-	if err != nil {
-		return fmt.Errorf("parse latitude: %w", err)
-	}
-	newGpsInfo.Longitude, err = strconv.ParseFloat(strs[2], 64)
-	if err != nil {
-		return fmt.Errorf("parse longitude: %w", err)
-	}
-	newGpsInfo.Latitude /= 100
-	newGpsInfo.Longitude /= 100
-	newGpsInfo.LatitudeIndicator = strs[1]
-	newGpsInfo.LongitudeIndicator = strs[3]
-	newGpsInfo.Date = strs[4]
-	newGpsInfo.Time = strs[5]
-	newGpsInfo.Altitude, err = strconv.ParseFloat(strs[6], 64)
-	if err != nil {
-		return fmt.Errorf("parse altitude: %w", err)
-	}
-	newGpsInfo.Speed, err = strconv.ParseFloat(strs[7], 64)
-	if err != nil {
-		return fmt.Errorf("parse speed: %w", err)
-	}
-	// Course sometimes may be null
-	if len(strs[8]) > 0 {
-		newGpsInfo.Course, err = strconv.ParseFloat(strs[8], 64)
-		if err != nil {
-			return fmt.Errorf("parse course: %w", err)
-		}
-	}
-	*gps = newGpsInfo
-	return nil
-}
-
-func (gps *GpsData) Update(port at.Port) error {
-	if err := switchGpsMode(port, true); err != nil {
-		return fmt.Errorf("try to GPS mode: %w", err)
-	}
-	defer switchGpsMode(port, false)
-
-	resp, err := port.Send("AT+CGPSINFO")
-	if err != nil {
-		return fmt.Errorf("receive GPS data: %w", err)
-	}
-	if !resp.Check() {
-		return fmt.Errorf("error response")
-	}
-	if err := gps.decode(strings.Split(strings.Replace(resp.RmFront("+CGPSINFO:").String(), "\r", "", -1), "\n")[0]); err != nil {
-		return fmt.Errorf("decode: %w", err)
-	}
-	return nil
-}
-
-func switchGpsMode(port at.Port, on bool) error {
-	onStr := "0"
-	if on {
-		onStr = "1"
-	}
-
-	// Reset input
-	if err := port.GetSerialPort().ResetInputBuffer(); err != nil {
-		return fmt.Errorf("reset input buffer: %w", err)
-	}
-	// Reset output
-	if err := port.GetSerialPort().ResetOutputBuffer(); err != nil {
-		return fmt.Errorf("reset output buffer: %w", err)
-	}
-
-	// Check gps mode status
-	resp, err := port.Send("AT+CGPS?")
-	if err != nil {
-		return fmt.Errorf("make at ask: %w", err)
-	}
-	if !resp.Check() {
-		return fmt.Errorf("error response")
-	}
-	ans := strings.Replace(strings.Split(strings.Split(resp.RmFront("+CGPS:").String(), "\n")[0], ",")[0], " ", "", -1)
-	if ans == onStr {
-		return nil
-	}
-
-	// Modem is not in GPS mode
-	resp, err = port.Send("AT+CGPS=" + onStr)
-	if err != nil {
-		return fmt.Errorf("try to switch to gps: %w", err)
-	}
-	if !resp.Check() {
-		return fmt.Errorf("switch tp GPS failed")
-	}
-	return nil
-}

api/modem/gps/data.go

@@ -0,0 +1,83 @@
+package gps
+
+import (
+	"fmt"
+	"io"
+	"log"
+	"math"
+	"strconv"
+	"strings"
+	"time"
+)
+
+type Data struct {
+	Latitude           float64 `json:"Latitude"`            // ddmm.mmmmmm
+	Longitude          float64 `json:"Longitude"`           // dddmm.mmmmmm
+	LatitudeIndicator  string  `json:"Latitude_indicator"`  // N/S - North/South
+	LongitudeIndicator string  `json:"Longitude_indicator"` // W/E - West/East
+	Speed              float64 `json:"Speed"`
+	Course             float64 `json:"-"`
+	Altitude           float64 `json:"-"`
+	Date               string  `json:"-"`
+	Time               string  `json:"-"`
+}
+
+var GpsInfoNil = Data{}
+
+func deg2rad(deg float64) float64 {
+	return deg * (math.Pi / 180)
+}
+
+func (gps *Data) CalculateSpeed(newLatitude, newLongitude float64, lastUpdateTime time.Time) {
+	earthRad := 6371.0 // TODO ?
+	dLat := deg2rad(math.Abs(newLatitude - gps.Latitude))
+	dLon := deg2rad(math.Abs(newLongitude - gps.Longitude))
+	a := math.Sin(dLat/2)*math.Sin(dLat/2) +
+		math.Cos(deg2rad(newLatitude))*math.Cos(deg2rad(gps.Latitude))*math.Sin(dLon/2)*math.Sin(dLon/2)
+	c := 2 * math.Atan2(math.Sqrt(a), math.Sqrt(1-a))
+
+	gps.Speed = earthRad * c / (math.Abs(float64(time.Since(lastUpdateTime))))
+}
+
+// To remove warning
+
+// Parse string from AT command that contains gps data
+func (gps *Data) decode(str string) error {
+	var err error
+	newGpsInfo := Data{}
+	strs := strings.Split(strings.Split(strings.Replace(str, " ", "", -1), "\n")[0], ",")
+	logger := log.New(io.Discard, "modem-gps", log.LstdFlags)
+
+	if len(strs) < 7 {
+		return fmt.Errorf("ERROR: too small msg: %s", strs)
+	}
+	newGpsInfo.Latitude, err = strconv.ParseFloat(strs[0], 64)
+	if err != nil {
+		logger.Println("ERROR parse latitude:", err.Error())
+	}
+	newGpsInfo.Longitude, err = strconv.ParseFloat(strs[2], 64)
+	if err != nil {
+		logger.Println("ERROR parse longitude:", err.Error())
+	}
+	newGpsInfo.LatitudeIndicator = strs[1]
+	newGpsInfo.LongitudeIndicator = strs[3]
+	newGpsInfo.Date = strs[4]
+	newGpsInfo.Time = strs[5]
+	newGpsInfo.Altitude, err = strconv.ParseFloat(strs[6], 64)
+	if err != nil {
+		logger.Println("ERROR parse altitude:", err.Error())
+	}
+	newGpsInfo.Speed, err = strconv.ParseFloat(strs[7], 64)
+	if err != nil {
+		logger.Println("ERROR parse speed:", err.Error())
+	}
+	// Course sometimes may be null
+	if len(strs[8]) > 0 {
+		newGpsInfo.Course, err = strconv.ParseFloat(strs[8], 64)
+		if err != nil {
+			logger.Println("ERROR parse course:", err.Error())
+		}
+	}
+	*gps = newGpsInfo
+	return nil
+}

api/modem/gps/gps.go

@@ -0,0 +1,107 @@
+package gps
+
+import (
+	"fmt"
+	"io"
+	"log"
+	"strings"
+
+	"gitea.unprism.ru/KRBL/sim-modem/api/modem/at"
+)
+
+type gps struct {
+	logger *log.Logger
+	port   at.Port
+	data   Data
+}
+
+type Gps interface {
+	Init() error
+	Update() error
+
+	GetData() Data
+	GetStatus() (Status, error)
+
+	io.Closer
+}
+
+func New(logger *log.Logger, port at.Port) Gps {
+	return &gps{
+		logger: logger,
+		port:   port,
+	}
+}
+
+func (g *gps) Init() error {
+	if !g.port.IsConnected() {
+		return fmt.Errorf("at port is not connected")
+	}
+	return nil
+}
+
+func (g *gps) Update() error {
+	if err := g.switchGpsMode(true); err != nil {
+		return fmt.Errorf("try to GPS mode: %w", err)
+	}
+	defer g.switchGpsMode(false)
+
+	resp, err := g.port.Send("AT+CGPSINFO")
+	if err != nil {
+		return fmt.Errorf("receive GPS data: %w", err)
+	}
+	if !resp.Check() || !resp.CheckFront("+CGPSINFO:") {
+		return fmt.Errorf("get GPS info: error response: %s", resp)
+	}
+
+	if err := g.data.decode(strings.Split(strings.Replace(resp.RmFront("+CGPSINFO:").String(), "\r", "", -1), "\n")[0]); err != nil {
+		g.logger.Printf("error decode: %s\n", err.Error())
+	}
+	return nil
+}
+
+func (g *gps) GetData() Data {
+	return g.data
+}
+
+func (g *gps) Close() error {
+	return nil
+}
+
+func (g *gps) switchGpsMode(on bool) error {
+	onStr := "0"
+	if on {
+		onStr = "1"
+	}
+
+	// Reset input
+	if err := g.port.SerialPort().ResetInputBuffer(); err != nil {
+		return fmt.Errorf("reset input buffer: %w", err)
+	}
+	// Reset output
+	if err := g.port.SerialPort().ResetOutputBuffer(); err != nil {
+		return fmt.Errorf("reset output buffer: %w", err)
+	}
+
+	// Check gps mode status
+	resp, err := g.port.Send("AT+CGPS?")
+	if err != nil {
+		return err
+	}
+	if !resp.Check() || !resp.CheckFront("+CGPS:") {
+		return fmt.Errorf("get GPS mode: error response: %s", resp)
+	}
+	ans := strings.Replace(strings.Split(strings.Split(resp.RmFront("+CGPS:").String(), "\n")[0], ",")[0], " ", "", -1)
+	if ans == onStr {
+		return nil
+	}
+
+	// Modem is not in GPS mode
+	resp, err = g.port.Send("AT+CGPS=" + onStr)
+	if err != nil {
+		return err
+	}
+	if !resp.Check() {
+		return fmt.Errorf("set GPS mode: error response: %s", resp)
+	}
+	return nil
+}

api/modem/gps/nmea.go

@@ -0,0 +1,151 @@
+package gps
+
+import (
+	"fmt"
+	"log"
+	"strings"
+	"time"
+)
+
+type nmeaFlags int
+
+const (
+	gga     nmeaFlags = 1 << iota // global positioning systemfix data
+	rmc                           // recommended minimumspecific	GPS/TRANSIT data
+	gpgsv                         // GPS satellites in view
+	gpgsa                         // GPS DOP and active satellites
+	vtg                           // track made good and ground speed
+	xfi                           // Global Positioning SystemExtended FixData.)Bit 6 – GLGSV (GLONASS satellites in view GLONASSfixesonly
+	glgsa                         // 1. GPS/2. Glonass/3. GALILE DOPandActiveSatellites.
+	gns                           // fix data for GNSS receivers; output for GPS, GLONASS, GALILEO
+	_                             // Reserved
+	gagsv                         // GALILEO satellites in view
+	_                             // Reserved
+	_                             // Reserved
+	_                             // Reserved
+	_                             // Reserved
+	_                             // Reserved
+	bdpqgsa                       // BEIDOU/QZSS DOP and activesatellites
+	bdpqgsv                       // BEIDOUQZSS satellites in view
+
+	nmeaFlagsMask = (1 << 18) - 1
+
+	collectTimeout = 1 * time.Second
+)
+
+func secondCountDownTimer(title string, logger *log.Logger, t time.Duration) {
+	_ = title
+	_ = logger
+	counter := 0
+	for {
+		if counter > int(t.Seconds()) {
+			break
+		}
+		// logger.Printf("%s: %d/%f\n", title, counter, t.Seconds())
+		time.Sleep(time.Second)
+		counter += 1
+	}
+}
+
+// Go... otherwise will throw warning
+var nmeaFlagsAll = gga | rmc | gpgsv | gpgsa | vtg | xfi | glgsa | gns | gagsv | bdpqgsa | bdpqgsv
+
+func (g *gps) rawCollect(flags nmeaFlags) (string, error) {
+	// Need to omplement low level write/read here because collect must be atomic operation
+	// If other command is executed(write/read) it will read a part of nmea report and cause an error
+
+	// Setup gps
+
+	// Set output rate to 10Hz
+	if resp, err := g.port.Send("AT+CGPSNMEARATE=1"); err != nil {
+		return "", err
+	} else {
+		if !resp.Check() {
+			return "", fmt.Errorf("set output rate: error response: %s", resp)
+		}
+	}
+
+	g.switchGpsMode(true)
+	g.port.Mutex().Lock()
+	s := g.port.SerialPort()
+	defer func() {
+		g.port.Mutex().Unlock()
+		g.switchGpsMode(false)
+	}()
+
+	// Send AT+CGPSINFOCFG=255, flags
+	flags &= nmeaFlagsMask
+	if _, err := s.Write([]byte("AT+CGPSINFOCFG=1,31\r\n")); err != nil {
+		return "", fmt.Errorf("serial port write 1: %w", err)
+	}
+	// Do I need to read answer
+
+	// Wait
+	secondCountDownTimer("Collecting NMEA data", g.logger, collectTimeout)
+
+	// Send AT+CGPSINFOCFG=0, flags
+	if _, err := s.Write([]byte("AT+CGPSINFOCFG=0,31\r\n")); err != nil {
+		return "", fmt.Errorf("serial port write 2: %w", err)
+	}
+	if _, err := s.Write([]byte("AT+CGPSFTM=0\r\n")); err != nil { // For sure because sometimes it cannot stop...
+		return "", fmt.Errorf("serial port write 2: %w", err)
+	}
+
+	time.Sleep(100 * time.Millisecond) // To enshure
+
+	// Read
+	outBuf := make([]byte, 0)
+	buf := make([]byte, 128)
+
+readLoop:
+	for {
+		n, err := s.Read(buf)
+		if err != nil {
+			return string(outBuf), fmt.Errorf("serial port read: %w", err)
+		}
+		if n == 0 {
+			break readLoop
+		}
+		outBuf = append(outBuf, buf[:n]...)
+	}
+
+	return string(outBuf), nil
+}
+
+func (g *gps) collectNmeaReports(flags nmeaFlags) ([]string, error) {
+	// Raw collect
+	resp, err := g.rawCollect(flags)
+	if err != nil {
+		return nil, fmt.Errorf("raw collect: %w", err)
+	}
+
+	// DEBUG
+	g.logger.Println("NMEA raw collect:", resp)
+
+	// Right responce struct:
+	// \r\n
+	// OK
+	// \r\n
+	// (NMEA sentence)...
+	// \r\n
+	// OK
+	// \r\n
+	strs := strings.Split(strings.Replace(resp, "\r", "", -1), "\n")
+
+	// Check
+	// Now wait for:
+	// OK
+	// (NMEA sentence)...
+	// OK
+	// if len(strs) < 2 {
+	// 	return nil, fmt.Errorf("responce too few rows: %d", len(strs))
+	// }
+	// if !(strs[0] == "OK" && strs[len(strs)-1] == "OK") {
+	// 	return nil, fmt.Errorf("not OK responce: [%  s]", strs)
+	// }
+
+	// This... response is not stable
+	// Every time it gives one or two OK and in ramdom order
+	// So I will not check gor it
+	return strs, nil
+}

api/modem/gps/status.go

@@ -0,0 +1,151 @@
+package gps
+
+import (
+	"fmt"
+	"strconv"
+	"strings"
+)
+
+type Status struct {
+	GotResponses         bool    `json:"gotResponses"`
+	IsValidData          bool    `json:"isValidData"`
+	FoundSatelitesCount  int     `json:"foundSatelitesCount"`
+	ActiveSatelitesCount int     `json:"activeSatelitesCount"`
+	Rms                  float32 `json:"rms"` // Root mean square
+}
+
+var StatusNil = Status{
+	GotResponses:         false,
+	IsValidData:          false,
+	FoundSatelitesCount:  0,
+	ActiveSatelitesCount: 0,
+	Rms:                  0,
+}
+
+func (g *gps) GetStatus() (Status, error) {
+	// Provides more information about signal and possible problems using NMEA reports
+
+	// Collect reports
+	reports, err := g.collectNmeaReports(nmeaFlagsAll) // Now minimum
+	if err != nil {
+		return StatusNil, fmt.Errorf("collect nmea reports: %w", err)
+	}
+
+	// Annalise
+	st := Status{}
+
+checkLoop:
+	for _, s := range reports {
+		// Check for NMEA format
+		if len(s) < 1 || s[0] != '$' {
+			continue checkLoop
+		}
+		st.GotResponses = true
+
+		// g.logger.Println("NMEA check:", s)
+		values := strings.Split(s, ",")
+		if len(values[0]) != 6 {
+			return StatusNil, fmt.Errorf("nmea invalid sentence: %s", s)
+		}
+		switch values[0][3:] { // Switch by content
+		case "GSV": // Any satelites
+			// g.logger.Println("check GSV")
+			// Check len
+			if len(values) < 17 {
+				g.logger.Println("GSV too small values")
+				continue checkLoop
+			}
+
+			// Decode
+			// 0 - msg type
+			// 1 - number of msgs
+			// 2 - index of this msg
+			// 3 - number of visible satelites
+			// 4: - other data
+
+			// Msg index
+			index, err := strconv.Atoi(values[3])
+			if err != nil {
+				g.logger.Println("GSV too small values")
+				continue checkLoop
+			}
+			_ = index
+			// if index != 0 {
+			// 	g.logger.Println("discard not first GSV msg")
+			// 	continue checkLoop
+			// }
+
+			// Count
+			satCount, err := strconv.Atoi(values[4])
+			if err != nil {
+				g.logger.Println("GSV too small values")
+				continue checkLoop
+			}
+			st.FoundSatelitesCount = satCount
+		case "GSA": // Active satelites
+			// g.logger.Println("check GSA")
+
+			// Check len
+			if len(values) < 17 {
+				g.logger.Println("GSV too small values")
+				continue checkLoop
+			}
+
+			// Decode
+			// 0 - msg type
+			// 1 - mode of selecting format
+			// 2 - mode of selected format
+			// 3:15 - IDs of active satelites
+			// 15: - other data
+
+			// Counting active satelites
+			count := 0
+			for _, v := range values[3:15] {
+				if _, err := strconv.Atoi(v); err == nil {
+					count += 1
+				}
+			}
+			st.ActiveSatelitesCount = max(st.ActiveSatelitesCount, count)
+		case "RMC": // Minimum GPS data
+			// g.logger.Println("check RMC")
+			// Check len
+			if len(values) < 12 {
+				g.logger.Println("RMC too small values")
+				continue checkLoop
+			}
+
+			// Decode
+			// 0 - msg type
+			// 1 - time
+			// 2 - is data valid or not
+			// 3: - other data
+
+			// Is valid value
+			if values[2] == "A" {
+				st.IsValidData = true
+			}
+		case "GST":
+			// g.logger.Println("check GST")
+			// Check len
+			if len(values) < 8 {
+				g.logger.Println("GST too small values")
+				continue checkLoop
+			}
+
+			// Decode
+			// 0 - msg type
+			// 1 - time
+			// 2 - Root Mean Square
+			// 3: - other data
+
+			rms, err := strconv.ParseFloat(values[2], 32)
+			if err != nil {
+				g.logger.Println("RMS decode:", err.Error())
+				continue checkLoop
+			}
+			st.Rms = float32(rms)
+		}
+	}
+
+	return st, nil
+}

api/modem/internet/ic.go

@@ -1,51 +1,53 @@
 package internet
 
 import (
+	"context"
 	"fmt"
 	"io"
 	"log"
-	"os"
 	"os/exec"
+	"strconv"
 	"strings"
+	"time"
 
-	"github.com/CGSG-2021-AE4/modem-test/api/modem/at"
+	"gitea.unprism.ru/KRBL/sim-modem/api/modem/at"
 )
 
-var apns = map[string]string{
+const (
-	"Tinkoff": "m.tinkoff",
+	pingPacketsCount     = 3
-}
+	pingTimeout          = 5
-
+	inetConnectedTimeout = 4 * time.Second
-const pppConfigName = "annalistnet"
+	pingAddr             = "8.8.8.8"
-const pppConfig = `
+	ifName               = "ppp0" // Interface name
-# Annalist project custom internet connection
+	inetMetric           = 2000
-
+)
-# APN:
-connect "/usr/sbin/chat -v -f /etc/chatscripts/gprs -T %s"
-
-# Port:
-%s
-
-# Baudrate:
-%d
-
-noipdefault
-usepeerdns
-defaultroute
-persist
-noauth
-nocrtscts
-local
-`
 
 type conn struct {
 	logger *log.Logger
 	port   at.Port
+
+	pppPort string
+
+	isConnectExecuted bool
+	isInited          bool
+	isRouteSet        bool
+
+	connectTime time.Time
+	gw          string // Gateway
 }
 
 type Conn interface {
-	Init() error
+	Init(pppPort string) error
-	ConfigurePPP() error
+
-	Ping() bool // Is connected
+	Connect() error
+	Disconnect() error
+
+	SetDefaultRouteTable() error
+	UnsetDefaultRouteTable() error
+
+	IsConnected() bool // Check interface existance
+	Ping() error
+
 	io.Closer
 }
 
@@ -53,190 +55,256 @@ func New(logger *log.Logger, port at.Port) Conn {
 	return &conn{
 		logger: logger,
 		port:   port,
+
+		isConnectExecuted: false,
+		isInited:          false,
+		isRouteSet:        false,
 	}
 }
 
-func (c *conn) checkPackageExist(pname string) bool {
+func (c *conn) Init(pppPort string) error {
-	resp, err := exec.Command("apt-mark", "showmanual", pname).Output()
+	c.pppPort = pppPort
-	c.logger.Println("CHECK:", resp)
+	// Setup only setup
-	if err != nil {
-		c.logger.Println("CHECK PACKAGE ERROR: ", err.Error())
-		return false
-	}
-	return string(resp[:len(pname)]) == pname
-}
-
-func (c *conn) ensurePackage(pname string) error {
-	if c.checkPackageExist(pname) {
-		return nil
-	}
-	return fmt.Errorf("package %s not installed", pname)
-	// c.logger.Println("Installing", pname, "package...")
-	// resp, err := exec.Command("apt-get", "install", pname).Output()
-	// if err != nil {
-	// return fmt.Errorf("execute install cmd: %w", err)
-	// }
-	// c.logger.Println(resp)
-	// c.logger.Println("\x1b[38;2;255;0;0mComplete\x1b[38;2;255;255;255m")
-	// return nil
-}
-
-// Check requirenments
-func (c *conn) checkReqs() error {
-	// Check AT port for sure
-	if c.port == nil || !c.port.IsConnected() {
-		return fmt.Errorf("AT port is not connect or nil")
-	}
-
-	// Ensure all necessary packages installed
-	if err := c.ensurePackage("ppp"); err != nil {
-		return fmt.Errorf("ensure ppp package: %w", err)
-	}
-	// if err := c.ensurePackage("net-tools"); err != nil {
-	// 	return fmt.Errorf("ensure net-tools package: %w", err)
-	// }
-
-	// Check SIM is valid
-	//   AT+CPIN? and just check
-	resp, err := c.port.Send("AT+CPIN?")
-	if err != nil {
-		return fmt.Errorf("AT+CPIN? request: %w", err)
-	}
-	if !resp.Check() {
-		return fmt.Errorf("SIM card is not inserted")
-	}
-	return nil
-}
-
-func (c *conn) ConfigurePPP() error {
-	// Get provider name and its APN
-	resp, err := c.port.Send("AT+CSPN?")
-	if err != nil {
-		return fmt.Errorf("AT+CSPN? request: %w", err)
-	}
-	if !resp.Check() {
-		return fmt.Errorf("failed to check SIM provider")
-	}
-	strs := strings.Split(string(resp), "\"")
-	if len(strs) < 3 {
-		return fmt.Errorf("parse AT+CSPN response: %s", string(resp))
-	}
-	provider := strs[1]
-	apn := apns[provider]
-	if apn == "" {
-		return fmt.Errorf("no apn for provider: %s", provider)
-	}
-
-	// Make config
-	c.logger.Printf("Config values: %s, %s, %d", apn, c.port.GetName(), c.port.GetBaudrate())
-	config := fmt.Sprintf(pppConfig, apn, c.port.GetName(), c.port.GetBaudrate())
-
-	// Write to file
-	f, err := os.OpenFile("/etc/ppp/peers/"+pppConfigName, os.O_CREATE | os.O_WRONLY, 0666)
-	if err != nil {
-		return fmt.Errorf("open ppp config file %w", err)
-	}
-	defer f.Close()
-	if _, err := f.Write([]byte(config)); err != nil {
-		return fmt.Errorf("write to ppp config file: %w", err)
-	}
-	return nil
-}
-
-func (c *conn) setup() error {
-	c.logger.Println("Check requirenments...")
-	if err := c.checkReqs(); err != nil {
-		return fmt.Errorf("check requirenments: %w", err)
-	}
-	// DEBUG show networks and signal
-	resp, err := c.port.Send("AT+COPS?")
-	if err != nil {
-		return fmt.Errorf("AT+COPS? request: %w", err)
-	}
-	c.logger.Println("DEBUG networks:", resp)
-
-	resp, err = c.port.Send("AT+CSQ")
-	if err != nil {
-		return fmt.Errorf("AT+CSQ request: %w", err)
-	}
-	c.logger.Println("DEBUG signal quality:", resp)
-
-	// Configure ppp
-	// what is better ASK If /etc/ppp/peers/annalistnet not exists
-	c.logger.Println("Configure ppp...")
-	if err := c.ConfigurePPP(); err != nil {
-		return fmt.Errorf("configure ppp: %w", err)
-	}
-	return nil
-}
-
-func (c *conn) connect() error {
-	resp, err := exec.Command("pon", pppConfigName).Output()
-	if err != nil {
-		return fmt.Errorf("execute connect cmd: %w", err)
-	}
-	c.logger.Println("DEBUG pon response:", string(resp))
-	return nil
-}
-
-func (c *conn) diconnect() error {
-	resp, err := exec.Command("poff", pppConfigName).Output()
-	if err != nil {
-		return fmt.Errorf("execute disconnect cmd: %w", err)
-	}
-	c.logger.Println("DEBUG poff response:", string(resp))
-	return nil
-}
-
-func (c *conn) Init() error {
-	// Setup
-	c.logger.Println("Setup...")
 	if err := c.setup(); err != nil {
 		return fmt.Errorf("setup: %w", err)
 	}
-	// Connect
+	c.isInited = true
-	c.logger.Println("Connect...")
+	return nil
-	if err := c.connect(); err != nil {
+}
-		return fmt.Errorf("connect: %w", err)
-	}
 
-	//DEBUG
+func (c *conn) Connect() error {
-	resp, err := exec.Command("ifconfig").Output()
+	if !c.isInited {
+		return fmt.Errorf("internet submodule is not inited")
+	}
+	// Check is already connected
+	if c.isConnectExecuted {
+		return fmt.Errorf("already connected")
+	}
+	// Check signal
+
+	resp, err := exec.Command("pon", pppConfigName).Output()
 	if err != nil {
-		return fmt.Errorf("execute ifconfig cmd: %w", err)
+		return fmt.Errorf("execute pon cmd: %w", err)
+	}
+	if len(resp) > 0 {
+		c.logger.Println("pon response:", string(resp))
 	}
-	c.logger.Println("DEBUG ifconfig resp:", string(resp))
 
-	// Test connectin using Ping
+	c.isConnectExecuted = true
-	c.logger.Println("Test...")
+	c.connectTime = time.Now()
-	if !c.Ping() {
+	c.gw, err = c.GetHostIp()
-		return fmt.Errorf("ping failed")
+	if err != nil {
+		return fmt.Errorf("get host ip: %w", err)
+	}
+	c.logger.Println("\x1b[38;2;0;255;0mInternet connected.\x1b[38;2;255;255;255m")
+
+	return nil
+}
+
+func (c *conn) Disconnect() error {
+	// return nil // Temporary do not turn off inet
+	if !c.isConnectExecuted {
+		return nil
+		// return fmt.Errorf("internet is not connected")
+	}
+	c.isConnectExecuted = false
+	resp, err := exec.Command("poff", pppConfigName).Output()
+	if err != nil {
+		return fmt.Errorf("execute poff cmd: %w", err)
+	}
+	if len(resp) > 0 {
+		c.logger.Println("poff response:", string(resp))
+	}
+	c.isConnectExecuted = false
+	c.logger.Println("\x1b[38;2;0;255;0mInternet disconnected.\x1b[38;2;255;255;255m")
+	return nil
+}
+
+func (c *conn) SetDefaultRouteTable() error {
+	// route add -net default gw 10.64.64.64 metric 2000 dev ppp0
+	resp, err := exec.Command("route", "add", "-net", "default", "gw", c.gw, "metric", strconv.Itoa(inetMetric), "dev", ifName).Output()
+	if err != nil {
+		return fmt.Errorf("execute add cmd: %w", err)
+	}
+	// Check response
+	if len(resp) != 0 {
+		c.logger.Println("Not nil response:", string(resp))
+	}
+	c.isRouteSet = true
+	c.logger.Println("\x1b[38;2;0;255;0mInternet route table set.\x1b[38;2;255;255;255m")
+	return nil
+}
+
+func (c *conn) UnsetDefaultRouteTable() error {
+	if !c.isRouteSet {
+		return fmt.Errorf("route table is not set")
+	}
+	resp, err := exec.Command("route", "del", "-net", "default", "gw", c.gw, "metric", strconv.Itoa(inetMetric), "dev", ifName).Output()
+	if err != nil {
+		return fmt.Errorf("execute del cmd: %w", err)
+	}
+	// Check response
+	if len(resp) != 0 {
+		c.logger.Println("Not nil response:", string(resp))
+	}
+	c.logger.Println("\x1b[38;2;0;255;0mInternet route table unset.\x1b[38;2;255;255;255m")
+	return nil
+}
+
+func (c *conn) ping(flags []string, timeout int) error {
+	c.logger.Println("Ping", flags[len(flags)-1])
+
+	// Just counter
+	ctx, cancel := context.WithCancel(context.Background())
+	go func(c *conn, ctx context.Context) {
+		for i := 0; i < timeout; i++ {
+			c.logger.Printf("Ping %d/%d", i, timeout)
+			select {
+			case <-ctx.Done():
+				return
+			case <-time.After(time.Second):
+			}
+		}
+	}(c, ctx)
+
+	// Executing cmd
+	cmd := exec.Command("ping", flags...)
+	resp, err := cmd.Output()
+	cancel()
+	if err != nil {
+		c.logger.Println("Ping default interface cmd error:", err)
+	}
+
+	// Parse
+	lines := strings.Split(string(resp), "\n")
+
+	// Look for string "--- *.*.*.* ping statistics ---" by first simbol '-'
+	stLineI := 0
+searchStLineLoop:
+	for i, l := range lines {
+		if len(l) > 0 && l[0] == '-' {
+			stLineI = i + 1
+			break searchStLineLoop
+		}
+	}
+	if stLineI == 0 || stLineI >= len(lines) {
+		return fmt.Errorf("failed to find statistics line: %d", stLineI)
+	}
+	stStr := lines[stLineI]
+
+	// Get third value "packet lost"
+	values := strings.Split(stStr, ",")
+	if len(values) < 3 {
+		return fmt.Errorf("invalid statistic values(len): [%s]", values)
+	}
+
+	// Get number
+	words := strings.Split(values[2], " ")
+	if len(words) < 2 {
+		return fmt.Errorf("invalid \"packets lost\" value(words count): [%s]", words)
+	}
+	// First is ''
+	// Second is '...%'
+	packetsLost, err := strconv.Atoi(words[1][:len(words[1])-1]) // Without '%' char
+	if err != nil {
+		return fmt.Errorf("parse \"packets lost\" value: %w", err)
+	}
+	if packetsLost == 100 {
+		return fmt.Errorf("lost all packages")
+	}
+	if packetsLost > 0 {
+		c.logger.Printf("lost some packets: %d%%\n", packetsLost)
 	}
 	return nil
 }
 
-func (c *conn) Ping() bool {
+func (c *conn) GetHostIp() (string, error) {
-	// Test - try to connect to Google DNS
+	if !c.isConnectExecuted {
-	//   ping -I ppp0 8.8.8.8
+		return "", fmt.Errorf("internet not connected")
-	resp, err := exec.Command("ping", "8.8.8.8").Output()
-	if err != nil {
-		c.logger.Println("Ping 1 cmd error:", err)
 	}
-	c.logger.Println("Ping 1 resp:", string(resp))
+	// Wait some time for system to setup route table
+	time.Sleep(time.Until(c.connectTime.Add(inetConnectedTimeout)))
 
-	resp, err = exec.Command("ping", "-I", "ppp0", "8.8.8.8").Output()
+	// Execute cmd
+	resp, err := exec.Command("route").Output()
 	if err != nil {
-		c.logger.Println("Ping 2 cmd error:", err)
+		return "", fmt.Errorf("exec route cmd: %w", err)
 	}
-	c.logger.Println("Ping 2 resp:", string(resp))
+	// Check and split to lines
+	lines := strings.Split(string(resp), "\n")
+	if len(lines) <= 3 || lines[0] != "Kernel IP routing table" {
+		return "", fmt.Errorf("invalid route response: [% s]", lines)
+	}
+	// Search line about ppp interface
+searchLoop:
+	for _, l := range lines[1:] {
+		words := strings.Fields(l)
+		if len(words) != 8 {
+			/// c.logger.Printf("invalid route line(words number): [%s]\n", words)
+			continue searchLoop
+		}
+		if words[7] == ifName {
+			if words[3] != "UH" {
+				// c.logger.Println("invalid flags")
+				continue searchLoop
+			}
+			return words[0], nil
+		}
+	}
+	return "", fmt.Errorf("found no suitable ppp interface")
+}
 
+func (c *conn) PingDefault() error {
+	return c.ping([]string{"-c", strconv.Itoa(pingPacketsCount), "-w", strconv.Itoa(pingTimeout), pingAddr}, pingTimeout)
+}
 
-	return !strings.Contains(string(resp), "Destination Host Unreachable") // tmp solution
+func (c *conn) PingPPP() error {
+	return c.ping([]string{"-I", ifName, "-c", string(pingPacketsCount), "-w", string(pingTimeout), pingAddr}, pingTimeout)
+}
+
+func (c *conn) Ping() error {
+	return c.PingDefault()
+}
+
+func (c *conn) IsConnected() bool {
+	if !c.isConnectExecuted {
+		return false
+	}
+	// Make "ifconfig" request
+	resp, err := exec.Command("ifconfig").Output()
+	if err != nil {
+		c.logger.Println("ifconfig cmd error:", err.Error())
+		return false
+	}
+	lines := strings.Split(string(resp), "\n")
+	for _, l := range lines {
+		if len(l) == 0 {
+			continue
+		}
+		if l[0] == ' ' {
+			continue
+		}
+		interfaceName := strings.Split(l, ":")[0]
+		if interfaceName == ifName {
+			return true
+		}
+	}
+	return false // Did not found
 }
 
 func (c *conn) Close() error {
-	if err := c.diconnect(); err != nil {
+	c.isInited = false
-		return fmt.Errorf("diconnect: %w", err)
+	// Unset route table
+	if c.isRouteSet {
+		if err := c.UnsetDefaultRouteTable(); err != nil {
+			c.logger.Println("unset route table error:", err.Error())
+		}
+	}
+	// Disconnect
+	if c.isConnectExecuted {
+		if err := c.Disconnect(); err != nil {
+			c.logger.Println("diconnect error:", err.Error())
+		}
 	}
 	return nil
 }

api/modem/internet/setup.go

@@ -0,0 +1,131 @@
+package internet
+
+import (
+	"fmt"
+	"os"
+	"os/exec"
+	"strings"
+
+	"gitea.unprism.ru/KRBL/sim-modem/api/modem/utils"
+)
+
+var apns = map[string]string{
+	"Tinkoff": "m.tinkoff",
+	"Megafon": "internet",
+	"BeeLine": "internet.beeline.ru",
+}
+
+const pppConfigName = "annalistnet"
+const pppConfig = `
+# Annalist project custom internet connection
+
+# APN:
+connect "/usr/sbin/chat -v -f /etc/chatscripts/gprs -T %s"
+
+# Port:
+%s
+
+# Baudrate:
+%d
+
+noipdefault
+usepeerdns
+defaultroute
+persist
+noauth
+nocrtscts
+local
+`
+
+func (c *conn) setup() error {
+	if err := c.checkReqs(); err != nil {
+		return fmt.Errorf("check requirenments: %w", err)
+	}
+	// Configure ppp
+	// what is better ASK If /etc/ppp/peers/annalistnet not exists
+	if err := c.configurePPP(); err != nil {
+		return fmt.Errorf("configure ppp: %w", err)
+	}
+	return nil
+}
+
+// Check requirenments
+func (c *conn) checkReqs() error {
+	// Check AT port for sure
+	if c.port == nil || !c.port.IsConnected() {
+		return fmt.Errorf("AT port is not connect or nil")
+	}
+
+	// Ensure all necessary packages installed
+	if err := c.ensurePackage("ppp"); err != nil {
+		return fmt.Errorf("ensure ppp package: %w", err)
+	}
+	// if err := c.ensurePackage("net-tools"); err != nil {
+	// 	return fmt.Errorf("ensure net-tools package: %w", err)
+	// }
+
+	// Check SIM is valid
+	if err := utils.CheckPIN(c.port, c.logger); err != nil {
+		return fmt.Errorf("PIN check: %w", err)
+	}
+	return nil
+}
+
+func (c *conn) ensurePackage(pname string) error {
+	if c.checkPackageExist(pname) {
+		return nil
+	}
+	return fmt.Errorf("package %s not installed", pname)
+	// c.logger.Println("Installing", pname, "package...")
+	// resp, err := exec.Command("apt-get", "install", pname).Output()
+	// if err != nil {
+	// return fmt.Errorf("execute install cmd: %w", err)
+	// }
+	// c.logger.Println(resp)
+	// c.logger.Println("\x1b[38;2;255;0;0mComplete\x1b[38;2;255;255;255m")
+	// return nil
+}
+
+func (c *conn) checkPackageExist(pname string) bool {
+	resp, err := exec.Command("apt-mark", "showmanual", pname).Output()
+	if err != nil {
+		c.logger.Println("check package error: ", err.Error())
+		return false
+	}
+	return string(resp[:len(pname)]) == pname
+}
+
+func (c *conn) configurePPP() error {
+	// Get provider name and its APN
+	resp, err := c.port.Send("AT+CSPN?")
+	if err != nil {
+		return fmt.Errorf("AT+CSPN? request: %w", err)
+	}
+	if !resp.Check() {
+		return fmt.Errorf("get provider: error response: %s", resp)
+	}
+	strs := strings.Split(string(resp), "\"")
+	if len(strs) < 3 {
+		return fmt.Errorf("parse AT+CSPN response: %s", string(resp))
+	}
+	provider := strs[1]
+	apn := apns[provider]
+	if apn == "" {
+		return fmt.Errorf("no apn for provider: %s", provider)
+	}
+
+	// Make config
+	c.logger.Printf("Config ppp values: %s, %s, %d", apn, c.pppPort, c.port.GetBaudrate())
+	config := fmt.Sprintf(pppConfig, apn, c.pppPort, c.port.GetBaudrate())
+
+	// Write to file
+	f, err := os.OpenFile("/etc/ppp/peers/"+pppConfigName, os.O_CREATE|os.O_WRONLY, 0666)
+	if err != nil {
+		return fmt.Errorf("open ppp config file %w", err)
+	}
+	defer f.Close()
+	if _, err := f.Write([]byte(config)); err != nil {
+		return fmt.Errorf("write to ppp config file: %w", err)
+	}
+	return nil
+}

api/modem/modem.go

@@ -1,202 +1,300 @@
 package modem
 
 import (
+	"context"
 	"fmt"
 	"io"
 	"log"
 	"os"
 	"os/exec"
+	"strconv"
 	"strings"
+	"sync"
 	"time"
 
-	"github.com/CGSG-2021-AE4/modem-test/api/modem/at"
+	"gitea.unprism.ru/KRBL/sim-modem/api/modem/at"
-	"github.com/CGSG-2021-AE4/modem-test/api/modem/gpio"
+	"gitea.unprism.ru/KRBL/sim-modem/api/modem/gpio"
-	"github.com/CGSG-2021-AE4/modem-test/api/modem/internet"
+	"gitea.unprism.ru/KRBL/sim-modem/api/modem/gps"
-	"github.com/CGSG-2021-AE4/modem-test/api/modem/sms"
+	"gitea.unprism.ru/KRBL/sim-modem/api/modem/internet"
+	"gitea.unprism.ru/KRBL/sim-modem/api/modem/sms"
 )
 
+// yy/MM/dd,hh:mm:ss+zzzz
+const timeLayout = "06/01/02,15:04:05-0700"
+
+var ttyPorts = []string{"ttyUSB1", "ttyUSB2", "ttyUSB3", "ttyS0", "ttyAMA2"}
+var availableModels = []string{"SIMCOM_SIM7600E-H", "SIMCOM_SIM808"}
+
 type ModemData struct {
 	Port string `json:"Port"`
-	GpsData
+	gps.Data
 }
 
 type modem struct {
 	// Internal values
 	logger *log.Logger
+	mutex  sync.Mutex
 
 	// Serial values
-	baudrate int
+	baudrate   int
-
 	deviceName string
 	port       at.Port
+	model      string
 
 	// Gpio values
-	onOffPin gpio.Pin
+	onOffPin gpio.Pin // For turning on and off
 
 	// Other values
 	lastUpdateTime time.Time
 
 	// GPS
-	gpsInfo GpsData
+	gps gps.Gps
 
 	// Internet connection
 	ic internet.Conn
 
 	// Sms and calls
-	sms sms.Dialer
+	sms sms.Sms
 }
 
 type Modem interface {
 	Init() error
-	Validate() bool
+	IsConnected() bool
 	Update() error
-	GetInfo() ModemData
+	GetData() ModemData
+	GetTime() (time.Time, error)
 
-	// Temp access to SMS and AT interface
+	PowerOn() error
-	Sms() sms.Dialer
+	PowerOnCtx(ctx context.Context) error // Because it takes ~30 seconds
-	At() at.Port
+	PowerOff() error
+
+	// Access to SMS, GPS, AT interfaces mostly for debug
+	At() at.Port       // Send
+	Gps() gps.Gps      // Update, GetData, GetStatus
+	Sms() sms.Sms      // Send, ReadNew
+	Ic() internet.Conn // Connect, Disconnect
 
 	io.Closer
 }
 
 func New(logger *log.Logger) Modem {
 	return &modem{
-		logger:         logger,
+		logger:   logger,
-		baudrate:       115200,
+		baudrate: 115200,
-		onOffPin:       gpio.New(log.New(logger.Writer(), "gpio", log.LstdFlags), 6),
+		onOffPin: gpio.New(log.New(logger.Writer(), "gpio", log.LstdFlags), 6),
+
 		lastUpdateTime: time.Now(),
 	}
 }
 
 func (m *modem) Init() error {
+	m.mutex.Lock()
+	defer m.mutex.Unlock()
+
 	// Turn module on
-	m.logger.Println("=============================== Turn on module")
+	m.logger.Println("=============================== Init gpio")
 	if err := m.onOffPin.Init(); err != nil {
 		return fmt.Errorf("gpio pin init: %w", err)
 	}
-	// m.onOffPin.PowerOn()
 
 	// Search
 	m.logger.Println("=============================== Search")
-	// Soft search
+	ports, err := m.searchPort(true)
-	if err := m.searchPort(true); err != nil {
+	if err != nil {
 		return fmt.Errorf("soft port search: %w", err)
 	}
-	// Wide search
+	if len(ports) == 0 {
-	if m.port == nil {
+		// Wide search
-		if err := m.searchPort(false); err != nil {
+		ports, err := m.searchPort(true)
-			return fmt.Errorf("not soft port search: %w", err)
+		if err != nil {
+			return fmt.Errorf("wide port search: %w", err)
+		}
+		if len(ports) == 0 {
+			return fmt.Errorf("no AT ports found")
 		}
 	}
-	if m.port == nil {
+	if len(ports) == 1 {
-		return fmt.Errorf("no port is detected")
+		// return fmt.Errorf("only one AT port found")
+		m.logger.Println("!!!!! only one AT port found")
 	}
 
+	// !!!!
+	// Internet connection and serial connection on one port is impossible, so:
+	//   port[0] is for serial
+	//   port[1] is for internet(ppp)
+	m.logger.Println(ports)
+
 	// Connect
 	m.logger.Println("=============================== Connect")
+	m.port = at.New(m.logger, ports[0], m.baudrate)
 	if err := m.connect(); err != nil {
 		return fmt.Errorf("connect: %w", err)
 	}
 
-	// Tests
+	// Init submodules
-	m.logger.Println("=============================== Test")
+	submodulesLogger := m.logger.Writer() // FOR more logs
-	if err := m.testGPS(); err != nil {
+	// submodulesLogger := io.Discard // FOR less logs
-		return fmt.Errorf("testGPS: %w", err)
+
+	m.logger.Println("=============================== Init submodules")
+	m.ic = internet.New(log.New(submodulesLogger, "modem-internet : ", log.LstdFlags), m.port)
+	if err := m.ic.Init(ports[len(ports)-1]); err != nil {
+		m.logger.Printf("\x1b[38;2;255;0;0mInternet: %s\x1b[38;2;255;255;255m\n", err.Error())
+	} else {
+		m.logger.Println("\x1b[38;2;0;255;0mInternet OK\x1b[38;2;255;255;255m")
 	}
 
-	// // Establish internet connection
+	// m.sms = sms.New(log.New(submodulesLogger, "modem-sms : ", log.LstdFlags), m.port)
-	// m.logger.Println("=============================== Internet")
+	// if err := m.sms.Init(); err != nil {
-	// m.ic = internet.New(log.New(m.logger.Writer(), "internet", log.LstdFlags), m.port)
+	// 	m.logger.Printf("\x1b[38;2;255;0;0mSMS: %s\x1b[38;2;255;255;255m\n", err.Error())
-	// if err := m.ic.Init(); err != nil {
+	// } else {
-	// 	return fmt.Errorf("internet connection init: %w", err)
+	// 	m.logger.Println("\x1b[38;2;0;255;0mSMS OK\x1b[38;2;255;255;255m")
 	// }
 
-	// Init sms dialer
+	m.gps = gps.New(log.New(submodulesLogger, "modem-gps : ", log.LstdFlags), m.port)
-	m.sms = sms.New(log.New(m.logger.Writer(), "sms", log.LstdFlags), m.port)
+	if err := m.gps.Init(); err != nil {
-	if err := m.sms.Init(); err != nil {
+		m.logger.Printf("\x1b[38;2;255;0;0mgps init %w\x1b[38;2;255;255;255m\n", err)
-		return fmt.Errorf("sms dialer init %w", err)
+	} else {
+		m.logger.Println("\x1b[38;2;0;255;0mGPS OK\x1b[38;2;255;255;255m")
 	}
-	return nil
-}
 
-func (m *modem) Validate() bool {
+	// Tests
-	return m.isConnected()
+	// GPS works fine but almost always there is no signal
+	// m.logger.Println("=============================== Test")
+	// if err := m.testGPS(); err != nil {
+	// 	return fmt.Errorf("testGPS: %w", err)
+	// }
+
+	return nil
 }
 
 func (m *modem) Update() error {
-	if !m.isConnected() {
+	m.mutex.Lock()
+	defer m.mutex.Unlock()
+
+	if !m.IsConnected() {
 		m.logger.Println("No connection to module")
 		return nil
 	}
-	m.logger.Println("Update")
+	m.logger.Println("Update", m.gps)
-	// ans, err := m.port.Request(at.CmdQuestion, "CGPSINFO")
+	if err := m.gps.Update(); err != nil {
-	// if err != nil {
+		m.logger.Println("gps update:", err.Error())
-	// 	return fmt.Errorf("check GPS info mode: %w", err)
+	}
-	// }
+	// Read new messages
-	// ok := ans == "1"
-	// if !ok {
-	// 	_, err := m.port.Request(at.CmdCheck, "CGPSINFO")
-	// 	if err != nil {
-	// 		return fmt.Errorf("switch to GPS info mode: %w", err)
-	// 	}
-	// 	m.logger.Println("switched to GPS mode")
-	// } else {
-	// 	m.logger.Println("mode in right GPS mode")
-	// }
 
-	// Update
-	m.logger.Println("Receiving GPS data...")
-	resp, err := m.port.Send("AT+CGPSINFO")
-	if err != nil {
-		return fmt.Errorf("receive GPS data: %w", err)
-	}
-	if !resp.Check() {
-		return fmt.Errorf("error response")
-	}
-	m.logger.Println("Decoding data...")
-
-	if err := m.gpsInfo.decode(strings.Split(strings.Replace(resp.RmFront("+CGPSINFO:").String(), "\r", "", -1), "\n")[0]); err != nil {
-		m.logger.Println("Gps info decode error:", err.Error())
-		return nil
-	}
-	m.logger.Println("Decoded successfully")
 	return nil
 }
 
-func (m *modem) GetInfo() ModemData {
+func (m *modem) GetData() ModemData {
+	m.mutex.Lock()
+	defer m.mutex.Unlock()
+
 	return ModemData{
-		Port:    m.port.GetName(),
+		Port: m.port.GetName(),
-		GpsData: m.gpsInfo,
+		Data: m.gps.GetData(),
 	}
 }
 
-func (m *modem) Sms() sms.Dialer {
+func (m *modem) GetTime() (time.Time, error) {
+	// Make request
+	resp, err := m.port.Send("AT+CCLK?")
+	if err != nil {
+		return time.Time{}, err
+	}
+	if !resp.Check() || !resp.CheckFront("+CCLK: ") {
+		return time.Time{}, fmt.Errorf("CCLK? error response: %s", resp.String())
+	}
+	// Extract time string
+	values := strings.Split(strings.Split(resp.String(), "\n")[0], "\"")
+	if len(values) < 2 {
+		return time.Time{}, fmt.Errorf("invalid values (len): [%s]", values)
+	}
+	timeStr := values[1]
+	m.logger.Println("Raw time:", timeStr)
+	if len(timeStr) != len("yy/MM/dd,hh:mm:ss+zz") {
+		return time.Time{}, fmt.Errorf("invalid time string: %s", timeStr)
+	}
+	// Convert time zone
+	timeZoneStr := timeStr[len(timeStr)-2:]
+	timeZone, err := strconv.Atoi(timeZoneStr)
+	if err != nil {
+		return time.Time{}, fmt.Errorf("parse time zone: %w", err)
+	}
+	timeStr = fmt.Sprintf("%s%02d%02d", timeStr[:len(timeStr)-2], timeZone/4, timeZone%4)
+	// Parse to golang time
+	return time.Parse(timeLayout, timeStr)
+}
+
+func (m *modem) PowerOn() error {
+	m.onOffPin.PowerOn() // DEBUG do not want to wait 30 seconds
+	return nil
+}
+
+func (m *modem) PowerOnCtx(ctx context.Context) error {
+	m.onOffPin.PowerOnCtx(ctx) // DEBUG do not want to wait 30 seconds
+	return nil
+}
+
+func (m *modem) PowerOff() error {
+	_, err := m.At().Send("AT+CPOF")
+	return err
+}
+
+func (m *modem) restart() error {
+	m.PowerOff()
+	time.Sleep(10 * time.Second)
+	m.PowerOn()
+	return nil
+}
+
+func (m *modem) Sms() sms.Sms {
 	return m.sms
 }
 
+func (m *modem) Gps() gps.Gps {
+	return m.gps
+}
+
 func (m *modem) At() at.Port {
 	return m.port
 }
 
-func (m *modem) Close() error {
+func (m *modem) Ic() internet.Conn {
-	if err := m.sms.Close(); err != nil {
+	return m.ic
-		return fmt.Errorf("sms: %w", err)
+}
+
+func (m *modem) Close() error { // I can't return error so I log it
+	m.mutex.Lock()
+	defer m.mutex.Unlock()
+
+	// Close submodules
+	if m.sms != nil {
+		if err := m.sms.Close(); err != nil {
+			m.logger.Printf("\x1b[38;2;255;0;0mclose sms error: %s\x1b[38;2;255;255;255m\n", err.Error())
+		}
+	}
+	if m.ic != nil {
+		if err := m.ic.Close(); err != nil {
+			m.logger.Printf("\x1b[38;2;255;0;0mclose internet error: %s\x1b[38;2;255;255;255m\n", err.Error())
+		}
+	}
+	if m.gps != nil {
+		if err := m.gps.Close(); err != nil {
+			m.logger.Printf("\x1b[38;2;255;0;0mclose gps error: %s\x1b[38;2;255;255;255m\n", err.Error())
+		}
 	}
 
-	// Not right way I think
+	// Close gpio and serial
-	if err := m.port.Close(); err != nil {
-		return fmt.Errorf("serial port: %w", err)
-	}
 	if err := m.onOffPin.Close(); err != nil {
-		return fmt.Errorf("gpio pin: %w", err)
+		m.logger.Printf("\x1b[38;2;255;0;0mclose gpio pin error: %s\x1b[38;2;255;255;255m\n", err.Error())
 	}
-	if err := m.ic.Close(); err != nil {
+	if err := m.port.Close(); err != nil {
-		return fmt.Errorf("internet connection: %w", err)
+		m.logger.Printf("\x1b[38;2;255;0;0mclose serial port error: %s\x1b[38;2;255;255;255m\n", err.Error())
 	}
-
 	return nil
 }
 
+///////////// Private functions
+
 func (m *modem) connect() error {
 	if m.port == nil {
 		return fmt.Errorf("port is not defined")
@@ -211,7 +309,7 @@ func (m *modem) disconnect() error {
 	return m.port.Disconnect()
 }
 
-func (m *modem) isConnected() bool {
+func (m *modem) IsConnected() bool {
 	if m.port != nil {
 		return m.port.IsConnected()
 	}
@@ -231,7 +329,8 @@ func (m *modem) testGPS() error {
 
 // Difference: I do not set \n at the end of string
 func (m *modem) getShortInfo() string {
-	return fmt.Sprintf("%f,%s,%f,%s", m.gpsInfo.Latitude, m.gpsInfo.LatitudeIndicator, m.gpsInfo.Longitude, m.gpsInfo.LongitudeIndicator)
+	d := m.gps.GetData()
+	return fmt.Sprintf("%f,%s,%f,%s", d.Latitude, d.LatitudeIndicator, d.Longitude, d.LongitudeIndicator)
 }
 
 func (m *modem) saveGPS(path string) error {
@@ -247,22 +346,67 @@ func (m *modem) saveGPS(path string) error {
 	return nil
 }
 
-func (m *modem) testConsole() {
+// Short way to send command
-	for {
+func (m *modem) printCmd(cmd string) {
-		var inStr string
+	if resp, err := m.port.Send(cmd); err != nil {
-		fmt.Scanln(&inStr)
+		m.logger.Println("FAILED TO SEND REQ", cmd, "===>", err.Error())
-		if inStr == "exit" {
+	} else {
-			return
+		_ = resp
-		}
+		// m.logger.Println("CMD", cmd, "===>", resp)
-		resp, err := m.port.Send(inStr)
-		if err != nil {
-			m.logger.Println("ERROR:", err.Error())
-		}
-		m.logger.Println(resp)
-		m.logger.Println("------------------")
 	}
 }
 
+// Some required commands before checking port
+func (m *modem) setupPort() error {
+	// Reset input
+	if err := m.port.SerialPort().ResetInputBuffer(); err != nil {
+		return fmt.Errorf("reset input buffer: %w", err)
+	}
+	// Reset output
+	if err := m.port.SerialPort().ResetOutputBuffer(); err != nil {
+		return fmt.Errorf("reset output buffer: %w", err)
+	}
+
+	// m.restart()
+	// These commands ensure that correct modes are set
+	// m.port.RawSend("\r\n\x1A\r\n") // Sometimes enables echo mode
+	//if m.At().GetName() == "/dev/ttyUSB0" {
+	// buf := make([]byte, 256)
+	// for i := 0; i < 10; i++ {
+	// 	len, err := m.port.SerialPort().Read(buf)
+	// 	if err != nil {
+	// 		m.logger.Println("ERROR:", err.Error())
+	// 	}
+	// 	if len != 0 {
+	// 		m.logger.Println(string(buf[:len]))
+	// 	}
+	// 	time.Sleep(time.Second)
+	// 	m.logger.Println(".")
+	// }
+	//}
+	m.printCmd("AT")           // Sometimes enables echo mode
+	m.printCmd("AT")           // Sometimes enables echo mode
+	m.printCmd("ATE0")         // Sometimes enables echo mode
+	m.printCmd("AT+CGPSFTM=0") // Sometimes does not turn off nmea
+	m.printCmd("AT+CMEE=2")    // Turn on errors describtion
+	m.printCmd("AT+CTZU=1")    // Turn on time update
+
+	return nil
+}
+
+func (m *modem) checkCurPortDead() error {
+	if err := m.port.RawSend("AT\r\n"); err != nil {
+		return fmt.Errorf("raw send: %w", err)
+	}
+	if resp, err := m.port.RawRead(time.Second); err != nil || len(resp) == 0 {
+		if err != nil {
+			return fmt.Errorf("raw read: %w", err)
+		}
+		return fmt.Errorf("read 0")
+	}
+	return nil
+}
+
 func (m *modem) checkPort(portName string) (outErr error) {
 	defer func() {
 		if outErr != nil { // Clear port if there is error
@@ -283,16 +427,17 @@ func (m *modem) checkPort(portName string) (outErr error) {
 	}
 	defer m.port.Disconnect() // Do not bother about errors...
 
-	// Reset input
+	// m.restart()
-	if err := m.port.GetSerialPort().ResetInputBuffer(); err != nil {
+
-		return fmt.Errorf("reset input buffer: %w", err)
+	// To filter dead ports
+
+	if err := m.checkCurPortDead(); err != nil {
+		return fmt.Errorf("echo: %w", err)
 	}
-	// Reset output
+
-	if err := m.port.GetSerialPort().ResetOutputBuffer(); err != nil {
+	if err := m.setupPort(); err != nil {
-		return fmt.Errorf("reset output buffer: %w", err)
+		return fmt.Errorf("setup port: %w", err)
 	}
-	m.port.Send("ATE0") // This shit sometimes enables echo mode... why... when... but it can
-	// m.port.Send("\r\n")
 
 	// Ping
 	m.logger.Println("Ping...")
@@ -308,64 +453,73 @@ func (m *modem) checkPort(portName string) (outErr error) {
 		return fmt.Errorf("get model: %w", err)
 	}
 	if !resp.Check() {
-		return fmt.Errorf("error response: %s", resp)
+		return fmt.Errorf("get model: error response: %s", resp)
 	}
 	model := strings.Split(resp.String(), "\n")[0]
 	if err != nil {
 		return fmt.Errorf("get model: %w", err)
 	}
-	rightModel := "SIMCOM_SIM7600E-H"
+
-	// m.logger.Printf("[% x]\n [% x]", []byte("SIMCOM_SIM7600E-H"), []byte(model))
+	// Check model
-	if len(model) >= len(rightModel) && model[:len(rightModel)] != rightModel {
+	foundModel := ""
-		return fmt.Errorf("invalid modem model: %s", model)
+	for _, rightModel := range availableModels {
+		if len(model) >= len(rightModel) && model[:len(rightModel)] == rightModel {
+			foundModel = rightModel
+			break
+		}
 	}
+	if foundModel == "" {
+		return fmt.Errorf("invalid model: %s", model)
+	}
+	m.model = foundModel
 	m.logger.Println("\x1b[38;2;0;255;0mOK\x1b[38;2;255;255;255m")
 	return nil
 }
 
-func (m *modem) searchPort(isSoft bool) error {
-	// Get ports
-	ports := []string{"ttyUSB1", "ttyUSB2", "ttyUSB3"}
-	if !isSoft {
-		ps, err := getTtyDevices()
-		if err != nil {
-			fmt.Errorf("get serial devices: %w", err)
-		}
-		ports = ps
-	}
-
-	// Check ports
-SearchLoop:
-	for _, p := range ports {
-		m.logger.Printf("Checking port %s ...\n", p)
-
-		if err := m.checkPort("/dev/" + p); err != nil {
-			m.logger.Printf("\x1b[38;2;255;0;0mCheck failed: %s\x1b[38;2;255;255;255m\n", err.Error())
-			continue SearchLoop
-		}
-
-		m.logger.Print("Found modem on port: ", p)
-		m.port = at.New(m.logger, "/dev/"+p, m.baudrate)
-		return nil
-	}
-	return nil
-}
-
 func (m *modem) ping() error {
 	resp, err := m.port.Send("AT")
 	if err != nil {
-		return err
+		return fmt.Errorf("AT request: %w", err)
 	}
 	if !resp.Check() {
-		return fmt.Errorf("connection lost")
+		return fmt.Errorf("AT request: error response: %s", resp)
 	}
 	return nil
 }
 
-func getTtyDevices() ([]string, error) {
+func (m *modem) searchPort(isSoft bool) ([]string, error) {
+	// Get ports
+	ports, err := getTtyPorts(isSoft)
+	if err != nil {
+		fmt.Errorf("get devices: %w", err)
+	}
+	// Check ports
+	return m.getAtPorts(ports)
+}
+
+func (m *modem) getAtPorts(ports []string) ([]string, error) {
+	outPorts := make([]string, 0)
+	for _, p := range ports {
+		m.logger.Printf("Checking port %s ...\n", p)
+
+		if err := m.checkPort("/dev/" + p); err != nil {
+			m.logger.Printf("\x1b[38;2;255;0;0mCheck failed: %s\x1b[38;2;255;255;255m\n", err.Error())
+			continue
+		}
+
+		m.logger.Print("Found AT port: ", p)
+		outPorts = append(outPorts, "/dev/"+p)
+	}
+	return outPorts, nil
+}
+
+func getTtyPorts(isSoft bool) ([]string, error) {
+	if isSoft {
+		return ttyPorts, nil
+	}
 	// Get ports
 	/**/
-	out, err := exec.Command("ls", "--", "/dev/tty[!0-9]*").Output()
+	out, err := exec.Command("ls", "/dev/tty[!0-9]*").Output()
 	if err != nil {
 		return nil, fmt.Errorf("execute ls command: %w", err)
 	}

api/modem/sms/errors.go

@@ -1,69 +0,0 @@
-package sms
-
-import (
-	"fmt"
-	"strconv"
-)
-
-func DecodeError(code int) string {
-	switch code {
-	case 300:
-		return "ME failure"
-	case 301:
-		return "SMS service of ME reserved"
-	case 302:
-		return "Operation not allowed"
-	case 303:
-		return "Operation not supported"
-	case 304:
-		return "Invalid PDU mode parameter"
-	case 305:
-		return "Invalid text mode parameter"
-	case 310:
-		return "SIM not inserted"
-	case 311:
-		return "SIM PIN required"
-	case 312:
-		return "PH-SIM PIN required"
-	case 313:
-		return "SIM failure"
-	case 314:
-		return "SIM busy"
-	case 315:
-		return "SIM wrong"
-	case 316:
-		return "SIM PUK required"
-	case 317:
-		return "SIM PIN2 required"
-	case 318:
-		return "SIM PUK2 required"
-	case 320:
-		return "Memory failure"
-	case 321:
-		return "Invalid memory index"
-	case 322:
-		return "Memory full"
-	case 330:
-		return "SMSC address unknown"
-	case 331:
-		return "No network service"
-	case 332:
-		return "Network timeout"
-	case 340:
-		return "NO +CNMA ACK EXPECTED"
-	case 341:
-		return "Buffer overflow"
-	case 342:
-		return "SMS size more than expected"
-	case 500:
-		return "Unknown error"
-	}
-	return "UNDEFINED ERROR CODE"
-}
-
-func GetError(msg []byte) (int, error) {
-	if len(msg) >= len("+CMS ERROR: ")+3 && string(msg[:len("+CMS ERROR: ")]) == "+CMS ERROR: " {
-		return strconv.Atoi(string(msg[len("+CMS ERROR: ") : len("+CMS ERROR: ")+3]))
-	}
-	return 0, fmt.Errorf("failed to parse error")
-}

api/modem/sms/setup.go

@@ -0,0 +1,88 @@
+package sms
+
+import (
+	"fmt"
+	"strconv"
+	"strings"
+)
+
+func (d *dialer) setupMsgSt() error {
+	// Check for free space for messages
+	// !!! I use one! memory for all three bindings
+	// 1: read and delete
+	// 2: sending
+	// 3: write received
+
+	// First try SM
+	if _, err := d.port.Send(`AT+CPMS="SM","SM","SM"`); err != nil {
+		return fmt.Errorf(`AT+CPMS="SM","SM","SM" request: %w`, err)
+	}
+	st, err := d.getCurMsgStSize()
+	if err != nil {
+		return fmt.Errorf("SM: %w", err)
+	}
+	if st[0].Used < st[0].Total {
+		d.logger.Printf("Use SM message storage: %d/%d\n", st[0].Used, st[0].Total)
+		return nil // There is space
+	}
+	d.logger.Printf("SM message storage is full: %d/%d\n", st[0].Used, st[0].Total)
+
+	// Second try ME
+	if _, err := d.port.Send(`AT+CPMS="ME","ME","ME"`); err != nil {
+		return fmt.Errorf(`AT+CPMS="ME","ME","ME" request: %w`, err)
+	}
+	st, err = d.getCurMsgStSize()
+	if err != nil {
+		return fmt.Errorf("ME: %w", err)
+	}
+	if st[0].Used < st[0].Total {
+		d.logger.Printf("Use ME message storage: %d/%d\n", st[0].Used, st[0].Total)
+		return nil // There is space
+	}
+	d.logger.Printf("ME message storage is full: %d/%d\n", st[0].Used, st[0].Total)
+	// Otherwise error
+	return fmt.Errorf("all storages are full")
+}
+
+// Message storage
+type msgSt struct {
+	Name  string
+	Used  int
+	Total int
+}
+
+// Get size of used and total mem of current memory storage
+func (d *dialer) getCurMsgStSize() ([]msgSt, error) {
+	// Request
+	resp, err := d.port.Send("AT+CPMS?")
+	if err != nil {
+		return nil, fmt.Errorf("AT+CPMS? request: %w", err)
+	}
+	// Check start and end
+	if !resp.Check() && !resp.CheckFront("+CPMS:") {
+		return nil, fmt.Errorf("AT+CPMS")
+	}
+	// Remove front and cut to values
+	resp = resp.RmFront("+CPMS:")
+	values := strings.Split(strings.ReplaceAll(strings.Split(resp.String(), "\n")[0], "\r", ""), ",")
+	if len(values) != 9 {
+		return nil, fmt.Errorf("CPMS response: invalid values count: [%s]", values)
+	}
+
+	// Parse values
+	outMsgs := [3]msgSt{}
+	for i := 0; i < 3; i++ {
+		name := values[i]
+		used, err := strconv.Atoi(values[i*3+1])
+		if err != nil {
+			return nil, fmt.Errorf("parse value #%d: %w", i+1, err)
+		}
+		total, err := strconv.Atoi(values[i*3+2])
+		if err != nil {
+			return nil, fmt.Errorf("parse value #%d, %w", i+2, err)
+		}
+
+		outMsgs[i] = msgSt{name, used, total}
+	}
+	return outMsgs[:], nil
+}

api/modem/sms/sms.go

@@ -6,7 +6,8 @@ import (
 	"log"
 	"strings"
 
-	"github.com/CGSG-2021-AE4/modem-test/api/modem/at"
+	"gitea.unprism.ru/KRBL/sim-modem/api/modem/at"
+	"gitea.unprism.ru/KRBL/sim-modem/api/modem/utils"
 )
 
 type dialer struct {
@@ -14,14 +15,15 @@ type dialer struct {
 	port   at.Port
 }
 
-type Dialer interface {
+type Sms interface {
 	Init() error
-	Send(number, msg string) error
+	Send(number, msg string) error // Send sms
-	ReadNew() ([]string, error)
+	ReadNew() ([]string, error)    // Read new smses
+
 	io.Closer
 }
 
-func New(logger *log.Logger, port at.Port) Dialer {
+func New(logger *log.Logger, port at.Port) Sms {
 	return &dialer{
 		logger: logger,
 		port:   port,
@@ -29,42 +31,66 @@ func New(logger *log.Logger, port at.Port) Dialer {
 }
 
 func (d *dialer) Init() error {
-	// Ensure serial port
+	// Ensure serial port is connected
 	if !d.port.IsConnected() {
 		return fmt.Errorf("serial port is not connected")
 	}
-	// Ensure text format
+	// Check ping
-	if resp, err := d.port.Send("AT+CMGF=1"); err != nil || !resp.Check() {
+	if err := utils.CheckPIN(d.port, d.logger); err != nil {
+		return fmt.Errorf("check PIN: %w", err)
+	}
+	// Setup prefered message storage
+	// if err := d.setupMsgSt(); err != nil { // Does not use store now
+	// 	d.logger.Printf("ERROR setup msg storage: %s\n", err.Error())
+	// }
+
+	// Set notifications into console
+	if resp, err := d.port.Send("AT+CNMI=2,2"); err != nil || !resp.Check() {
 		if err != nil {
-			return fmt.Errorf("AT+CMGF=1 request: %w", err)
+			return err
 		}
-		return fmt.Errorf("failed to set SMS format")
+		return fmt.Errorf("CNMI= error response: %s", resp.String())
+	}
+
+	// Check number
+	if resp, err := d.port.Send("AT+CNUM"); err != nil || !resp.Check() {
+		if err != nil {
+			return err
+		}
+		return fmt.Errorf("CNUM error response: %s", resp.String())
 	}
 	return nil
 }
 
 func (d *dialer) Send(number, msg string) error {
-	d.port.Send(fmt.Sprintf("AT+CMGS=\"%s\"", number))      // Because it will throw error
+	sresp, err := d.port.Send(fmt.Sprintf(`AT+CMGSEX="%s"`, number)) // Because it will throw error
-	resp, err := d.port.RawSend(fmt.Sprintf("%s\x1A", msg)) // Add additional \r\n because there is not supposed to be
 	if err != nil {
+		return err
+	}
+	d.logger.Println(sresp)
+
+	// Message body
+	if err := d.port.RawSend(fmt.Sprintf("%s\x1A", msg)); err != nil {
 		return fmt.Errorf("message request: %w", err)
 	}
-	if at.Resp(resp).Check() {
+	resp, err := d.port.RawRead(at.ReadTimeout)
-		return nil
-	}
-	errCode, err := GetError([]byte(resp))
 	if err != nil {
-		return fmt.Errorf("send sms failed and failed to get error: %w", err)
+		return fmt.Errorf("message request read: %w", err)
 	}
-	return fmt.Errorf("failed to send with SMS error: %d - %s", errCode, DecodeError(errCode))
+	d.logger.Println("Send response:", resp)
+	if !at.Resp(resp).Check() {
+		return fmt.Errorf("error response: %s", resp)
+	}
+	return nil
 }
 
 // Reads all new messages
 func (d *dialer) ReadNew() ([]string, error) {
-	resp, err := d.port.Send("AT+CMGL")
+	resp, err := d.port.Send("AT+CMGL=\"ALL\"")
 	if err != nil {
-		return nil, fmt.Errorf("AT+CMGL request: %w", err)
+		return nil, err
 	}
+	d.logger.Println("raw sms:", resp)
 	msgs := strings.Split(strings.Replace(string(resp), "\r", "", -1), "\n")
 
 	outMsgs := make([]string, 0)

api/modem/utils/service.go

@@ -0,0 +1,37 @@
+package utils
+
+import (
+	"fmt"
+	"log"
+	"strings"
+
+	"gitea.unprism.ru/KRBL/sim-modem/api/modem/at"
+)
+
+func CheckService(port at.Port, logger *log.Logger) (bool, error) {
+	srv, err := getService(port)
+	if err != nil {
+		return false, fmt.Errorf("get service: %w", err)
+	}
+	if srv == "NO SERVICE" {
+		return false, nil
+	}
+	logger.Println("Current service:", srv)
+	return true, nil
+}
+
+// Returns service
+func getService(port at.Port) (string, error) {
+	resp, err := port.Send("AT+CPSI?")
+	if err != nil {
+		return "", err
+	}
+	if !resp.Check() || !resp.CheckFront("+CPSI: ") {
+		return "", fmt.Errorf("error response: %s", resp)
+	}
+	values := strings.Split(strings.ReplaceAll(strings.Split(resp.RmFront("+CPSI: ").String(), "\n")[0], "\r", ""), ",")
+	if len(values) < 2 {
+		return "", fmt.Errorf("invalid values(len): [% s]", values)
+	}
+	return values[0], nil
+}

api/modem/utils/signal.go

@@ -0,0 +1,109 @@
+package utils
+
+import (
+	"fmt"
+	"log"
+	"strconv"
+	"strings"
+
+	"gitea.unprism.ru/KRBL/sim-modem/api/modem/at"
+)
+
+func CheckSignal(port at.Port, logger *log.Logger) (bool, error) {
+	rssi, ber, err := getSignalQuality(port)
+	if err != nil {
+		return false, fmt.Errorf("get signal quality: %w", err)
+	}
+	logger.Printf("check signal: rssi=%d ber=%d\n", rssi, ber)
+	if err := checkRssi(rssi); err != nil {
+		return false, nil
+	}
+	if err := checkBer(ber); err != nil {
+		logger.Printf("bad ber(not critical): %s", err.Error()) // Happened not to be critical
+	}
+	return true, nil
+}
+
+func checkRssi(rssi int) error {
+	// rssi - Received signal strength indicator
+	// 0          -113 dBm or less
+	// 1          -111 dBm
+	// 2...30     -109... - 53 dBm
+	// 31         -51 dBm or greater
+	// 99         not known or not detectable
+	// 100        -116 dBm or less
+	// 101        -115 dBm
+	// 102…191    -114... - 26dBm
+	// 191        -25 dBm or greater
+	// 199        not known or not detectable
+	// 100…199    expand to TDSCDMA, indicate RSCPreceived
+
+	if rssi <= 2 { // Too poor
+		return fmt.Errorf("too poor <= -109dBm")
+	}
+	if rssi > 2 && rssi <= 31 {
+		return nil // Can live
+	}
+	if rssi == 99 {
+		return fmt.Errorf("not known or not detectable")
+	}
+	if rssi >= 100 && rssi <= 102 {
+		return fmt.Errorf("too poor <= -114dBm")
+	}
+	if rssi > 102 && rssi <= 191 {
+		return nil // Can live
+	}
+	if rssi == 199 {
+		return fmt.Errorf("not known or not detectable")
+	}
+	return fmt.Errorf("invalid code %d", rssi)
+}
+
+func checkBer(ber int) error {
+	// ber - Bit error rate
+	// 0       <0.01%
+	// 1       0.01% --- 0.1%
+	// 2       0.1% --- 0.5%
+	// 3       0.5% --- 1.0%
+	// 4       1.0% --- 2.0%
+	// 5       2.0% --- 4.0%
+	// 6       4.0% --- 8.0%
+	// 7       >=8.0%
+	// 99      not known or not detectable
+	if ber >= 0 && ber <= 3 {
+		// ber -> [0%;1%)
+		// Ok, can live
+		return nil
+	}
+	if ber >= 4 && ber <= 7 {
+		return fmt.Errorf("too high: %d code", ber)
+	}
+	if ber == 99 {
+		return fmt.Errorf("not known or not detectable")
+	}
+	return fmt.Errorf("invalid code %d", ber)
+}
+
+// Returns rssi and ber(look above)
+func getSignalQuality(port at.Port) (int, int, error) {
+	resp, err := port.Send("AT+CSQ")
+	if err != nil {
+		return 99, 99, err
+	}
+	if !resp.Check() || !resp.CheckFront("+CSQ: ") {
+		return 99, 99, fmt.Errorf("error response: %s", resp)
+	}
+	values := strings.Split(strings.ReplaceAll(strings.Split(resp.RmFront("+CSQ: ").String(), "\n")[0], "\r", ""), ",")
+	if len(values) != 2 {
+		return 99, 99, fmt.Errorf("invalid values(len): [% s]", values)
+	}
+	rssi, err := strconv.Atoi(values[0])
+	if err != nil {
+		return 99, 99, fmt.Errorf("parse rssi: %w", err)
+	}
+	ber, err := strconv.Atoi(values[1])
+	if err != nil {
+		return 99, 99, fmt.Errorf("parse ber: %w", err)
+	}
+	return rssi, ber, nil
+}

api/modem/utils/sim.go

@@ -0,0 +1,26 @@
+package utils
+
+import (
+	"fmt"
+	"log"
+	"strings"
+
+	"gitea.unprism.ru/KRBL/sim-modem/api/modem/at"
+)
+
+func CheckPIN(port at.Port, logger *log.Logger) error {
+	// Get code
+	resp, err := port.Send("AT+CPIN?")
+	if err != nil {
+		return fmt.Errorf("AT+CPIN? request: %w", err)
+	}
+	if !resp.Check() || !resp.CheckFront("+CPIN:") {
+		return fmt.Errorf("AT+CPIN? error response: %s", resp)
+	}
+	code := strings.ReplaceAll(strings.ReplaceAll(strings.Split(resp.RmFront("+CPIN:").String(), "\n")[0], "\r", ""), " ", "")
+	if code != "READY" {
+		return fmt.Errorf("not READY code: %s", code)
+	}
+	logger.Println("PIN is ready")
+	return nil
+}

go.mod

@@ -1,4 +1,4 @@
-module github.com/CGSG-2021-AE4/modem-test
+module gitea.unprism.ru/KRBL/sim-modem
 
 go 1.22.5
 

main.go

@@ -1,43 +1,200 @@
 package main
 
 import (
+	"context"
+	"fmt"
 	"log"
 	"os"
+	"os/signal"
+	"syscall"
+	"time"
 
-	"github.com/CGSG-2021-AE4/modem-test/api/modem"
+	"gitea.unprism.ru/KRBL/sim-modem/api/modem"
 )
 
 func main() {
 	log.Println("CGSG forever!!!")
-	if err := mainE(); err != nil {
+
+	ctx, cancel := signal.NotifyContext(context.Background(), syscall.SIGINT, syscall.SIGTERM)
+	defer cancel()
+	// Just for logs
+	go func(ctx context.Context) {
+		<-ctx.Done()
+		log.Println("GOT INTERUPT SIGNAL")
+	}(ctx)
+
+	if err := mainE(ctx); err != nil {
 		log.Println("MAIN finished with error:", err.Error())
 	}
 	log.Println("END")
 }
 
-func mainE() error {
+var m modem.Modem
-	m := modem.New(log.New(os.Stdout, "modem:", log.LstdFlags))
+var logger *log.Logger
-	log.Println("||||||||||||||||| INIT |||||||||||||||")
+
-	if err := m.Init(); err != nil {
+func InetInit() error {
-		return err
+	// Connect to internet
+	if err := m.Ic().Connect(); err != nil {
+		return fmt.Errorf("connect to internet: %w", err)
 	}
-	if !m.Validate() {
+
-		log.Println("AAAAAAAAAAAAAAA Validation failed")
+	// Setup route table
+	// Linux now always manage to add ppp0 interface to route table in time so it is better to add ф loop here
+setupRouteTableLoop:
+	for {
+		if err := m.Ic().SetDefaultRouteTable(); err != nil {
+			logger.Println("set route table:", err.Error())
+			time.Sleep(2 * time.Second)
+		} else {
+			break setupRouteTableLoop
+		}
+	}
+	return nil
+}
+
+func Cmd(cmd string) {
+	resp, err := m.At().SendWithTimeout(cmd, 10*time.Second) //50*time.Millisecond)
+	logger.Println(cmd, "===>", resp, err)
+}
+
+func mainE(ctx context.Context) error {
+	logger = log.New(os.Stdout, "main : ", log.LstdFlags)
+	m = modem.New(log.New(logger.Writer(), "modem : ", log.LstdFlags))
+
+	logger.Println("||||||||||||||||| INIT |||||||||||||||")
+
+	// If power is down modem won't find suitable devices add will try to send powerOn signal and then try again
+initLoop:
+	for {
+		select {
+		case <-ctx.Done(): // For interupt
+			logger.Println("Break init loop")
+			return nil
+		default:
+			if err := m.Init(); err != nil {
+				logger.Println("Init ended with error:", err.Error())
+				// logger.Println("Turn on...")
+				// if err := m.PowerOnCtx(ctx); err != nil {
+				// 	logger.Println("Turn on error:", err.Error())
+				// }
+				time.Sleep(time.Second)
+				continue initLoop
+			}
+			break initLoop
+		}
+	}
+
+	// Final check for sure
+	if !m.IsConnected() {
+		logger.Println("Modem is not connected")
 		return nil
 	}
-	log.Println("||||||||||||||||| GET INFO |||||||||||||||||")
+	// Close() deinits everything recursively
-	log.Println(m.GetInfo())
+	defer func() {
+		logger.Println("||||||||||||||||| CLOSE |||||||||||||||")
+		m.Close()
+	}()
 
-	log.Println("||||||||||||||||| SEND SMS |||||||||||||||||")
+	// Internet connect
-	log.Println(m.At().Send("AT+CNUM"))
+	// if err := InetInit(); err != nil {
-	// if err := m.Sms().Send("+79218937173", "CGSG forever"); err != nil {
 	// 	return err
 	// }
-	if ms, err := m.Sms().ReadNew(); err != nil {
+
-		return err
+	logger.Println("||||||||||||||||| SMS |||||||||||||||||")
-	} else {
+
-		log.Println("NEW:", ms)
+	// Select ME PMS
+	// logger.Println("SEND SMS")
+	// logger.Println(m.Sms().Send("+79218937173", "CGSG forever!!!"))
+	// m.At().RawSend("\r\n\x1A\r\n")
+
+	// Cmd("AT+CREG?")
+	// Cmd("AT+CNMI?")
+	Cmd("AT+CNETSCAN")
+	// Cmd("AT+CSCA?")
+	// Cmd("AT+CPOL?")
+	// Cmd("AT+COPS?")
+	// // Cmd("AT+COPS=?")
+	// Cmd("AT+CPSI?")
+	// resp, err = m.At().Send("AT+CNMI=2,2")
+	for {
+		select {
+		case <-ctx.Done():
+			logger.Println("Break main loop")
+			return nil
+		default:
+			// Cmd("AT+CPSI?")
+			// Cmd("AT+CIPGSMLOC=1")
+			// Cmd("AT+CSQ")
+			// Cmd("AT+CTZU?")
+			// Cmd("AT+CPIN?")
+			// Cmd("AT+CCLK?")
+			// logger.Println(m.Gps().GetStatus())
+			// m.Update()
+			// st, _ := m.Gps().GetStatus()
+			// logger.Printf("FOUND SATELITES: %d\n", st.FoundSatelitesCount)
+			// data := m.GetData()
+			// logger.Printf("GPS DATA: %f%s   %f%s\n", data.Latitude, data.LatitudeIndicator, data.Longitude, data.LongitudeIndicator)
+			// logger.Println(m.GetTime())
+			// logger.Println(m.Ic().Ping())
+			time.Sleep(time.Second)
+		}
+		// Cmd("AT+CSQ")
+		// Cmd("AT+COPS?")
+
+		// if err := m.CheckSignal(); err != nil {
+		// 	logger.Println(err)
+		// } else {
+		// 	logger.Println("AAAAAAAAAAA THERE IS SIGNAL")
+		// }
+		// readLen, err := m.At().SerialPort().Read(buf)
+		// if err != nil {
+		// 	return err
+		// }
+		// if readLen > 0 {
+		// 	logger.Println(string(buf[:readLen]))
+		// }
 	}
 
+	// resp, err = m.At().Send("AT+CPMS?")
+	// logger.Println("Prefered mem storage:", resp, err)
+
+	// resp, err = m.At().Send("AT+CREG?")
+	// logger.Println("Network registration:", resp, err)
+	// resp, err = m.At().Send("AT+CPMS?")
+	// logger.Println("Prefered mem storage:", resp, err)
+	// resp, err = m.At().Send("AT+CPMS=?")
+	// logger.Println("Possible mem storage:", resp, err)
+	// resp, err = m.At().Send("AT+CNMI?")
+	// logger.Println("New message indications:", resp, err)
+	// resp, err = m.At().Send("AT+CMGL=\"REC UNREAD\"")
+	// logger.Println("New messages:", resp, err)
+	// resp, err = m.At().Send("AT+CNMI=2,1")
+	// logger.Println("AT+CNMI=2,1:", resp, err)
+	// resp, err = m.At().Send("AT+CNMI?")
+	// logger.Println("New message indications:", resp, err)
+	// logger.Println("Reading port...")
+	// for {
+	// 	readLen, err := m.At().SerialPort().Read(buf)
+	// 	if err != nil {
+	// 		return err
+	// 	}
+	// 	if readLen > 0 {
+	// 		logger.Println(string(buf[:readLen]))
+	// 	}
+	// }
+	// for {
+	// 	resp, err = m.At().Send("AT+CSQ")
+	// 	logger.Println("AT+CSQ:", resp, err)
+	// 	time.Sleep(500 * time.Millisecond)
+	// }
+	// logger.Println("||||||||||||||||| Checking gps status  |||||||||||||||||")
+	// st, err := m.Gps().GetStatus()
+	// if err != nil {
+	// 	return err
+	// }
+	// logger.Printf("GPS Status:%+v\n", st)
+
+	// logger.Println("Turn off", m.PowerOff())
+
 	return nil
 }

readme.md

@@ -1,2 +0,0 @@
-ISSUES:
-  - create input buffer every at port creation