Added GetTime. Added independent internet port. Debugged internet connection.

api/modem/at/at.go

@@ -37,8 +37,9 @@ type Port interface {
 	Disconnect() error
 	IsConnected() bool
 
-	RawSend(msg string) (string, error)
+	RawSend(msg string, timeout time.Duration) (string, error)
 	Send(cmd string) (Resp, error)
+	SendWithTimeout(cmd string, timeout time.Duration) (Resp, error)
 
 	io.Closer
 }
@@ -106,7 +107,7 @@ func (p *atPort) IsConnected() bool {
 }
 
 // Low level write/read function
-func (p *atPort) RawSend(msg string) (string, error) {
+func (p *atPort) RawSend(msg string, timeout time.Duration) (string, error) {
 	p.mutex.Lock()
 	defer p.mutex.Unlock()
 
@@ -114,25 +115,48 @@ func (p *atPort) RawSend(msg string) (string, error) {
 	if _, err := p.port.Write([]byte(msg)); err != nil {
 		return "", fmt.Errorf("serial port write: %w", err)
 	}
-	// time.Sleep(time.Millisecond)
+	time.Sleep(timeout)
 	// 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)
+	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 {
+			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(p.inputBuf[:readLen]), nil
+	return string(outBuf), nil
 }
 
 func (p *atPort) Send(cmd string) (Resp, error) {
-	cmd += "\r\n"
-	rawResp, err := p.RawSend(cmd)
+	rawResp, err := p.RawSend(cmd+"\r\n", time.Microsecond)
 	if err != nil {
-		return RespNil, fmt.Errorf("make request: %w", err)
+		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) {
+	rawResp, err := p.RawSend(cmd+"\r\n", 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
 

api/modem/at/response.go

@@ -9,12 +9,13 @@ func (resp Resp) Check() bool {
 }
 
 func (resp Resp) RmFront(str string) Resp {
-	if !resp.Check() {
-		return RespNil
-	}
 	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/gps/gps.go

@@ -49,9 +49,10 @@ func (g *gps) Update() error {
 	if err != nil {
 		return fmt.Errorf("receive GPS data: %w", err)
 	}
-	if !resp.Check() {
+	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())
 	}
@@ -84,9 +85,9 @@ func (g *gps) switchGpsMode(on bool) error {
 	// Check gps mode status
 	resp, err := g.port.Send("AT+CGPS?")
 	if err != nil {
-		return fmt.Errorf("make at ask: %w", err)
+		return err
 	}
-	if !resp.Check() {
+	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)
@@ -97,7 +98,7 @@ func (g *gps) switchGpsMode(on bool) error {
 	// Modem is not in GPS mode
 	resp, err = g.port.Send("AT+CGPS=" + onStr)
 	if err != nil {
-		return fmt.Errorf("set GPS mode: %w", err)
+		return err
 	}
 	if !resp.Check() {
 		return fmt.Errorf("set GPS mode: error response: %s", resp)

api/modem/gps/nmea.go

@@ -56,7 +56,7 @@ func (g *gps) rawCollect(flags nmeaFlags) (string, error) {
 
 	// Set output rate to 10Hz
 	if resp, err := g.port.Send("AT+CGPSNMEARATE=1"); err != nil {
-		return "", fmt.Errorf("AT+CGPSNMEARATE= request: %w", err)
+		return "", err
 	} else {
 		if !resp.Check() {
 			return "", fmt.Errorf("set output rate: error response: %s", resp)

api/modem/gps/status.go

@@ -42,14 +42,14 @@ checkLoop:
 		}
 		st.GotResponses = true
 
-		g.logger.Println("NMEA check:", s)
+		// 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")
+			// g.logger.Println("check GSV")
 			// Check len
 			if len(values) < 17 {
 				g.logger.Println("GSV too small values")
@@ -83,7 +83,7 @@ checkLoop:
 			}
 			st.FoundSatelitesCount = satCount
 		case "GSA": // Active satelites
-			g.logger.Println("check GSA")
+			// g.logger.Println("check GSA")
 
 			// Check len
 			if len(values) < 17 {
@@ -107,7 +107,7 @@ checkLoop:
 			}
 			st.ActiveSatelitesCount = max(st.ActiveSatelitesCount, count)
 		case "RMC": // Minimum GPS data
-			g.logger.Println("check RMC")
+			// g.logger.Println("check RMC")
 			// Check len
 			if len(values) < 12 {
 				g.logger.Println("RMC too small values")
@@ -125,7 +125,7 @@ checkLoop:
 				st.IsValidData = true
 			}
 		case "GST":
-			g.logger.Println("check GST")
+			// g.logger.Println("check GST")
 			// Check len
 			if len(values) < 8 {
 				g.logger.Println("GST too small values")

api/modem/internet/ic.go

@@ -4,237 +4,152 @@ import (
 	"fmt"
 	"io"
 	"log"
-	"os"
 	"os/exec"
 	"strings"
 
 	"gitea.unprism.ru/KRBL/sim-modem/api/modem/at"
 )
 
-var apns = map[string]string{
-	"Tinkoff": "m.tinkoff",
-}
-
-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
-`
-
 type conn struct {
 	logger *log.Logger
 	port   at.Port
+
+	pppPort string
+
+	isConnectExecuted bool
+	isInited          bool
 }
 
 type Conn interface {
-	Init() error
-	ConfigurePPP() error
-	Ping() bool // Is connected
+	Init(pppPort string) error
+
+	Connect() error
+	Disconnect() error
+
+	IsConnected() bool // Check interface existance
+	Ping() error
+
 	io.Closer
 }
 
 func New(logger *log.Logger, port at.Port) Conn {
 	return &conn{
-		logger: logger,
-		port:   port,
+		logger:            logger,
+		port:              port,
+		isConnectExecuted: false,
+		isInited:          false,
 	}
 }
 
-func (c *conn) checkPackageExist(pname string) bool {
-	resp, err := exec.Command("apt-mark", "showmanual", pname).Output()
-	c.logger.Println("CHECK:", resp)
-	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("validate SIM: error response: %s", resp)
-	}
-	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("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 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...")
+func (c *conn) Init(pppPort string) error {
+	c.pppPort = pppPort
+	// Setup only setup
 	if err := c.setup(); err != nil {
 		return fmt.Errorf("setup: %w", err)
 	}
-	// Connect
-	c.logger.Println("Connect...")
-	if err := c.connect(); err != nil {
-		return fmt.Errorf("connect: %w", err)
-	}
-
-	//DEBUG
-	resp, err := exec.Command("ifconfig").Output()
-	if err != nil {
-		return fmt.Errorf("execute ifconfig cmd: %w", err)
-	}
-	c.logger.Println("DEBUG ifconfig resp:", string(resp))
-
-	// Test connectin using Ping
-	c.logger.Println("Test...")
-	if !c.Ping() {
-		return fmt.Errorf("ping failed")
-	}
+	c.isInited = true
 	return nil
 }
 
-func (c *conn) Ping() bool {
+func (c *conn) Connect() error {
+	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
+	// if ok, err := utils.CheckService(c.port, c.logger); err != nil || !ok {
+	// 	if err != nil {
+	// 		return fmt.Errorf("check service: %w", err)
+	// 	}
+	// 	return fmt.Errorf("no service")
+	// }
+
+	resp, err := exec.Command("pon", pppConfigName).Output()
+	if err != nil {
+		return fmt.Errorf("execute pon cmd: %w", err)
+	}
+	if len(resp) > 0 {
+		c.logger.Println("pon response:", string(resp))
+	}
+	c.isConnectExecuted = true
+
+	// Set default route
+
+	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
+	return nil
+}
+
+func (c *conn) Ping() error {
 	// Test - try to connect to Google DNS
 	//   ping -I ppp0 8.8.8.8
 	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 default interface cmd error:", err)
 	}
-	c.logger.Println("Ping 1 resp:", string(resp))
+	c.logger.Println("Ping  default interface resp:", string(resp))
 
 	resp, err = exec.Command("ping", "-I", "ppp0", "8.8.8.8").Output()
 	if err != nil {
-		c.logger.Println("Ping 2 cmd error:", err)
+		c.logger.Println("Ping ppp0 interface cmd error:", err)
 	}
-	c.logger.Println("Ping 2 resp:", string(resp))
+	c.logger.Println("Ping ppp0 interface resp:", string(resp))
 
-	return !(strings.Contains(string(resp), "Destination Host Unreachable") || strings.Contains(string(resp), "Destination Net Unreachable")) // tmp solution
+	if strings.Contains(string(resp), "Destination Host Unreachable") || strings.Contains(string(resp), "Destination Net Unreachable") {
+		return fmt.Errorf("ping response: %s", string(resp))
+	}
+	return nil
+}
+
+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 == "ppp0" {
+			return true
+		}
+	}
+	return false // Did not found
 }
 
 func (c *conn) Close() error {
-	if err := c.diconnect(); err != nil {
+	c.isInited = false
+	if err := c.Disconnect(); err != nil {
 		return fmt.Errorf("diconnect: %w", err)
 	}
 	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

@@ -6,6 +6,7 @@ import (
 	"log"
 	"os"
 	"os/exec"
+	"strconv"
 	"strings"
 	"sync"
 	"time"
@@ -17,6 +18,9 @@ import (
 	"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"
+
 type ModemData struct {
 	Port string `json:"Port"`
 	gps.Data
@@ -53,14 +57,16 @@ type Modem interface {
 	IsConnected() bool
 	Update() error
 	GetData() ModemData
+	GetTime() (time.Time, error)
 
 	PowerOn() error
 	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
+	At() at.Port       // Send
+	Gps() gps.Gps      // Update, GetData, GetStatus
+	Sms() sms.Sms      // Send, ReadNew
+	Ic() internet.Conn // Connect, Disconnect
 
 	io.Closer
 }
@@ -80,29 +86,41 @@ func (m *modem) Init() error {
 	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)
 	}
 
 	// Search
 	m.logger.Println("=============================== Search")
-	// Soft search
-	if err := m.searchPort(true); err != nil {
+	ports, err := m.searchPort(true)
+	if err != nil {
 		return fmt.Errorf("soft port search: %w", err)
 	}
-	// Wide search
-	if m.port == nil {
-		if err := m.searchPort(false); err != nil {
-			return fmt.Errorf("not soft port search: %w", err)
+	if len(ports) == 0 {
+		// Wide search
+		ports, err := m.searchPort(true)
+		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 {
-		return fmt.Errorf("no port is detected")
+	if len(ports) == 1 {
+		// 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)
 	}
@@ -112,19 +130,19 @@ func (m *modem) Init() error {
 	// submodulesLogger := io.Discard // FOR less logs
 
 	m.logger.Println("=============================== Init submodules")
-	m.ic = internet.New(log.New(submodulesLogger, "modem-internet : ", log.LstdFlags), m.port)
-	if err := m.ic.Init(); 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")
-	}
+	// m.ic = internet.New(log.New(submodulesLogger, "modem-internet : ", log.LstdFlags), m.port)
+	// if err := m.ic.Init(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")
+	// }
 
-	m.sms = sms.New(log.New(submodulesLogger, "modem-sms : ", log.LstdFlags), m.port)
-	if err := m.sms.Init(); err != nil {
-		m.logger.Printf("\x1b[38;2;255;0;0mSMS: %s\x1b[38;2;255;255;255m\n", err.Error())
-	} else {
-		m.logger.Println("\x1b[38;2;0;255;0mSMS OK\x1b[38;2;255;255;255m")
-	}
+	// m.sms = sms.New(log.New(submodulesLogger, "modem-sms : ", log.LstdFlags), m.port)
+	// if err := m.sms.Init(); err != nil {
+	// 	m.logger.Printf("\x1b[38;2;255;0;0mSMS: %s\x1b[38;2;255;255;255m\n", err.Error())
+	// } else {
+	// 	m.logger.Println("\x1b[38;2;0;255;0mSMS OK\x1b[38;2;255;255;255m")
+	// }
 
 	m.gps = gps.New(log.New(submodulesLogger, "modem-gps : ", log.LstdFlags), m.port)
 	if err := m.gps.Init(); err != nil {
@@ -170,6 +188,35 @@ func (m *modem) GetData() ModemData {
 	}
 }
 
+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]
+	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
@@ -180,6 +227,13 @@ func (m *modem) PowerOff() error {
 	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
 }
@@ -192,24 +246,38 @@ func (m *modem) At() at.Port {
 	return m.port
 }
 
+func (m *modem) Ic() internet.Conn {
+	return m.ic
+}
+
 func (m *modem) Close() error { // I can't return error so I log it
 	m.mutex.Lock()
 	defer m.mutex.Unlock()
 
-	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())
+	// 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())
+		}
 	}
 
-	if err := m.port.Close(); err != nil {
-		m.logger.Printf("\x1b[38;2;255;0;0mclose serial port error: %s\x1b[38;2;255;255;255m\n", err.Error())
-	}
+	// Close gpio and serial
 	if err := m.onOffPin.Close(); err != nil {
 		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 {
-		m.logger.Printf("\x1b[38;2;255;0;0mclose internet connection error: %s\x1b[38;2;255;255;255m\n", err.Error())
+	if err := m.port.Close(); err != nil {
+		m.logger.Printf("\x1b[38;2;255;0;0mclose serial port error: %s\x1b[38;2;255;255;255m\n", err.Error())
 	}
-
 	return nil
 }
 
@@ -269,10 +337,10 @@ func (m *modem) saveGPS(path string) error {
 // Short way to send command
 func (m *modem) printCmd(cmd string) {
 	if resp, err := m.port.Send(cmd); err != nil {
-		m.logger.Println("FAILED TO SEND REQ", cmd, ":", err.Error())
+		m.logger.Println("FAILED TO SEND REQ", cmd, "===>", err.Error())
 	} else {
 		_ = resp
-		// m.logger.Println("CMD", cmd, ":", resp)
+		// m.logger.Println("CMD", cmd, "===>", resp)
 	}
 }
 
@@ -287,7 +355,9 @@ func (m *modem) setupPort() error {
 		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
 	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
@@ -295,6 +365,16 @@ func (m *modem) setupPort() error {
 	return nil
 }
 
+func (m *modem) checkCurPortDead() error {
+	if resp, err := m.port.RawSend("AT\r\n", 20*time.Millisecond); err != nil || len(resp) == 0 {
+		if err != nil {
+			return fmt.Errorf("raw send: %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
@@ -315,9 +395,12 @@ func (m *modem) checkPort(portName string) (outErr error) {
 	}
 	defer m.port.Disconnect() // Do not bother about errors...
 
+	// m.restart()
+
 	// To filter dead ports
-	if _, err := m.port.Send("AT"); err != nil {
-		return fmt.Errorf("ping error: %w", err)
+
+	if err := m.checkCurPortDead(); err != nil {
+		return fmt.Errorf("echo: %w", err)
 	}
 
 	if err := m.setupPort(); err != nil {
@@ -353,34 +436,6 @@ func (m *modem) checkPort(portName string) (outErr error) {
 	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 {
@@ -392,7 +447,36 @@ func (m *modem) ping() error {
 	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 []string{"ttyUSB1", "ttyUSB2", "ttyUSB3"}, nil
+	}
 	// Get ports
 	/**/
 	out, err := exec.Command("ls", "--", "/dev/tty[!0-9]*").Output()

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

@@ -5,8 +5,10 @@ import (
 	"io"
 	"log"
 	"strings"
+	"time"
 
 	"gitea.unprism.ru/KRBL/sim-modem/api/modem/at"
+	"gitea.unprism.ru/KRBL/sim-modem/api/modem/utils"
 )
 
 type dialer struct {
@@ -30,55 +32,61 @@ func New(logger *log.Logger, port at.Port) Sms {
 }
 
 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")
 	}
+	// Check ping
+	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())
+	// }
 
-	// Check SIM an PIN
-	if resp, err := d.port.Send("AT+CPIN?"); err != nil || !resp.Check() {
+	// Set notifications into console
+	if resp, err := d.port.Send("AT+CNMI=2,2"); err != nil || !resp.Check() {
 		if err != nil {
-			return fmt.Errorf("check pin: %w", err)
+			return err
 		}
-		return fmt.Errorf("check pin: error response: %s", resp)
+		return fmt.Errorf("CNMI= error response: %s", resp.String())
 	}
 
-	// Ensure text format
-	d.logger.Println(d.port.Send("AT+CMGF"))
-	if resp, err := d.port.Send("AT+CMGF=1"); err != nil || !resp.Check() {
+	// Check number
+	if resp, err := d.port.Send("AT+CNUM"); err != nil || !resp.Check() {
 		if err != nil {
-			return fmt.Errorf("set to text format request: %w", err)
+			return err
 		}
-		return fmt.Errorf("set SIM format: error response: %s", resp)
+		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
-	resp, err := d.port.RawSend(fmt.Sprintf("%s\n\r", msg)) // Add additional \r\n because there is not supposed to be
+	sresp, err := d.port.Send(fmt.Sprintf(`AT+CMGSEX="%s"`, number)) // Because it will throw error
+	if err != nil {
+		return err
+	}
+	d.logger.Println(sresp)
+	resp, err := d.port.RawSend(fmt.Sprintf("%s\x1A", msg), time.Millisecond) // Add additional \r\n because there is not supposed to be
 	if err != nil {
 		return fmt.Errorf("message request: %w", err)
 	}
-	d.logger.Println("SEND RESPONSE:", resp)
-	resp, err = d.port.RawSend("\x1A")
-	if err != nil {
-		return fmt.Errorf("message request: %w", err)
+	d.logger.Println("Send response:", resp)
+	if !at.Resp(resp).Check() {
+		return fmt.Errorf("error response: %s", resp)
 	}
-	d.logger.Println("SEND RESPONSE:", resp)
-	errCode, err := GetError([]byte(resp))
-	if err != nil {
-		return fmt.Errorf("send sms failed and failed to get error: %w", err)
-	}
-	return fmt.Errorf("failed to send with SMS error: %d - %s", errCode, DecodeError(errCode))
+	return nil
 }
 
 // Reads all new messages
 func (d *dialer) ReadNew() ([]string, error) {
-	resp, err := d.port.Send("AT+CMGL=\"UNREAD\"")
+	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 strenght 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
+}

main.go

@@ -1,59 +1,163 @@
 package main
 
 import (
+	"context"
 	"log"
 	"os"
+	"os/signal"
+	"syscall"
+	"time"
 
 	"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 {
+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 err := m.Init(); err != nil {
-		logger.Println("Init ended with error:", err.Error())
-		logger.Println("Try to turn on")
-		if err := m.PowerOn(); err != nil {
-			return err
-		}
-		logger.Println("Reinit")
-		if err := m.Init(); err != nil {
-			return err
+initLoop:
+	for {
+		select {
+		case <-ctx.Done():
+			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.PowerOn(); err != nil {
+				// 	logger.Println("Turn on error:", err.Error())
+				// }
+				continue initLoop
+			}
+			break initLoop
 		}
 	}
 	if !m.IsConnected() {
-		logger.Println("AAAAAAAAAAAAAAA Modem is not connected")
+		logger.Println("Modem is not connected")
 		return nil
 	}
-	logger.Println("||||||||||||||||| GET INFO |||||||||||||||||")
-	logger.Println(m.Update())
-	logger.Printf("DATA: %+v\n", m.GetData())
+	defer func() {
+		logger.Println("||||||||||||||||| CLOSE |||||||||||||||")
+		m.Close()
+	}()
 
-	logger.Println("||||||||||||||||| SEND SMS |||||||||||||||||")
-	logger.Println(m.At().Send("AT+CNUM"))
-	// if err := m.Sms().Send("+79218937173", "CGSG forever"); err != nil {
+	// Connect to internet
+	// if err := m.Ic().Connect(); err != nil {
+	// 	return fmt.Errorf("connect to internet: %w", err)
+	// }
+
+	logger.Println("||||||||||||||||| SMS |||||||||||||||||")
+	Cmd := func(cmd string) {
+		resp, err := m.At().SendWithTimeout(cmd, 50*time.Millisecond)
+		logger.Println(cmd, "===>", resp, err)
+	}
+	_ = Cmd
+
+	// 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+CSQ")
+	// 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+CSQ")
+			// Cmd("AT+CCLK?")
+			// logger.Println(m.Gps().GetStatus())
+			// m.Update()
+			// st, _ := m.Gps().GetStatus()
+			// logger.Printf("GPS STATUS: %+v", st)
+			// logger.Printf("GPS DATA: %+v", m.GetData())
+			logger.Println(m.GetTime())
+			time.Sleep(2 * 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
 	// }
-	if ms, err := m.Sms().ReadNew(); err != nil {
-		return err
-	} else {
-		logger.Println("NEW:", ms)
-	}
-	logger.Println("||||||||||||||||| Checking gps status  |||||||||||||||||")
-	st, err := m.Gps().GetStatus()
-	if err != nil {
-		return err
-	}
-	logger.Printf("GPS Status:%+v\n", st)
+	// logger.Printf("GPS Status:%+v\n", st)
 
 	// logger.Println("Turn off", m.PowerOff())