Add: check in RmFront

api/modem/at/response.go

@@ -9,6 +9,9 @@ func (resp Resp) Check() bool {
 }
 
 func (resp Resp) RmFront(str string) Resp {
+	if !resp.Check() {
+		return RespNil
+	}
 	return Resp(string(resp)[len(str):])
 }
 

api/modem/gps/data.go

@@ -2,6 +2,8 @@ package gps
 
 import (
 	"fmt"
+	"io"
+	"log"
 	"math"
 	"strconv"
 	"strings"
@@ -44,14 +46,18 @@ 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 {
-		return fmt.Errorf("parse latitude: %w", err)
+		logger.Println("ERROR parse latitude:", err.Error())
 	}
 	newGpsInfo.Longitude, err = strconv.ParseFloat(strs[2], 64)
 	if err != nil {
-		return fmt.Errorf("parse longitude: %w", err)
+		logger.Println("ERROR parse longitude:", err.Error())
 	}
 	newGpsInfo.Latitude /= 100
 	newGpsInfo.Longitude /= 100
@@ -61,17 +67,17 @@ func (gps *Data) decode(str string) error {
 	newGpsInfo.Time = strs[5]
 	newGpsInfo.Altitude, err = strconv.ParseFloat(strs[6], 64)
 	if err != nil {
-		return fmt.Errorf("parse altitude: %w", err)
+		logger.Println("ERROR parse altitude:", err.Error())
 	}
 	newGpsInfo.Speed, err = strconv.ParseFloat(strs[7], 64)
 	if err != nil {
-		return fmt.Errorf("parse speed: %w", err)
+		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 {
-			return fmt.Errorf("parse course: %w", err)
+			logger.Println("ERROR parse course:", err.Error())
 		}
 	}
 	*gps = newGpsInfo