GSM SIM808 WITH GPRS DOESN'T RECEIVE MESSAGES AFTER TEXTING IT 6 TIMES OR MORE

Using Arduino Programming Questions
1

Hello Guys I just want to ask what I can I do because my gsm sim808 doesn't receive messages after pressing the pushbutton and sending it 6 keywords it doesn't reply and receive anymore :frowning: my code is in below thankyou for your answers guys I really need it badly for my project thankyouuu
#include <SoftwareSerial.h>
SoftwareSerial sim808(11, 10); //Arduino(RX), Arduino(TX)
//Arduino(RX) to SIM808(TX)
//Arduino(TX) to SIM808(RX)
char phone_no[] = "+639513927267";// replace this with your phone no.
char phone_no2[] = "+639953492721";// replace this with your phone no2.
char phone_no3[] = "+639672534320";// replace this with your phone no3.
char phone_no4[] = "+639104033684";// replace this with your phone no4.
char phone_no5[] = "+639366198755";// replace this with your phone no5.

String data[7];
#define DEBUG true
String state,timegps,latitude,longitude,atmsg,msgi,gspeed;
bool bAdmin,bGetloc,bHelp,bClrmsg,bClrst=0;

int buttonpin = 12;

void setup() {
pinMode (buttonpin,INPUT);
sim808.begin(9600);
Serial.begin(9600);
delay(100);
sim808.print("AT+CMGF=1\r");//configure SIM to TEXT mode
delay(500);
sendData("AT+CGNSPWR=1",1000,DEBUG);//Turn on GPS(GNSS - Global Navigation Satellite System)
delay(500);
sendData("AT+CGNSSEQ=RMC",1000,DEBUG);
delay(500);
sendData("AT+CGPSSTATUS?",1000,DEBUG);//this will check your GPS status. A working GPS should get either a 2D or 3D fix location
delay(500);
sendMessage("Your bike GPS has been switched ON please wait for it to blink every second.");
Serial.println ("Done Notifying");
delay (500);

}

void loop() {
if (Serial.available()>0){sim808.write(Serial.read());}
if (sim808.available()>0){Serial.write(sim808.read());}
atmsg = sim808.readString();
if(atmsg.indexOf("+CMTI: ") >=0) {
Serial.println("Message received: \r" + atmsg); delay (3000);
msgi = atmsg.substring(atmsg.indexOf(",")+1);
sendData("AT+CMGR="+msgi,1000,DEBUG); Serial.println ("Done senda");
delay (1000);
// delay(50);
}
if (bAdmin ==1 && bHelp ==1){delay (1000);sendMessage("What can I do for you?\n1. Get Location\n2. Clear Messages\n3. Help");Serial.print ("Done Sending Keywords");bAdmin = 0; bHelp =0;}
if (bAdmin ==1 && bGetloc ==1){delay (1000); getGPSLocation();bAdmin = 0; bGetloc =0; }
if (bAdmin ==1 && bClrmsg ==1){ delay (1000); clearMessages();bAdmin = 0; bClrmsg =0; }
if (bAdmin ==1 && bClrst ==1){ delay (1000); setup(); Serial.println ("Done Sending Reset");bAdmin = 0; bClrst =0; }

Buttonpressing ();
}

void clearMessages(){
sendTabData("AT+CMGD=1,4",1000,DEBUG); Serial.println ("Done Clearing");
delay(3000);
sendMessage("Messages cleared!");
}

void getGPSLocation(){
sendTabData("AT+CGNSINF",1000,DEBUG);//Get GPS info(location
Serial.println("State :"+state);
Serial.println("Time :"+timegps);
Serial.println("Latitude :"+latitude);
Serial.println("Longitude :"+longitude);
sim808.print("AT+CMGS="");
sim808.print(phone_no);
sim808.println(""");
sim808.print("\nVehicle speed: ");
sim808.print (gspeed);
sim808.print(" kph\n\n");
sim808.println("Open the map link below for the GPS location... ");
sim808.print("Google Maps");
sim808.print(latitude);
sim808.print(",");
sim808.print (longitude);
delay(500);
sim808.println((char)26); // End AT command with a ^Z, ASCII code 26
sim808.println();
sim808.flush();
Serial.println ("Done Sending Loc");
}

void gpsEmergency (){ sendTabData("AT+CGNSINF",1000,DEBUG);
Serial.println("State :"+state);
Serial.println("Time :"+timegps);
Serial.println("Latitude :"+latitude);
Serial.println("Longitude :"+longitude);
sim808.print("AT+CMGS="");
sim808.print(phone_no);
sim808.println(""");
sim808.println("HELLO THIS IS RAYMARK DURO I AM ON A EMERGENCY RIGHT NOW PLEASE DO CONTACT ME AT MY NUMBER 09513927267 AND I AM LOCATED AT : ");
sim808.print("Google Maps");
sim808.print(latitude);
sim808.print(",");
sim808.print (longitude);
delay(500);
sim808.println((char)26); // End AT command with a ^Z, ASCII code 26
sim808.println();
sim808.flush();
Serial.println ("done 1");
delay (10000);

}

void gpsEmergency2 (){
sim808.print ("AT+CGNSINF");
sim808.print ("\n");
Serial.println("State :"+state);
Serial.println("Time :"+timegps);
Serial.println("Latitude :"+latitude);
Serial.println("Longitude :"+longitude);
sim808.print("AT+CMGS="");
sim808.print(phone_no2);
sim808.println(""");
sim808.println("HELLO THIS IS RAYMARK DURO I AM ON A EMERGENCY RIGHT NOW PLEASE DO CONTACT ME AT MY NUMBER 09513927267 AND I AM LOCATED AT : ");
sim808.print("Google Maps");
sim808.print(latitude);
sim808.print(",");
sim808.print (longitude);
delay(500);
sim808.println((char)26); // End AT command with a ^Z, ASCII code 26
sim808.println();
sim808.flush();
Serial.println ("done 2");
delay (10000);
}

2

void gpsEmergency3 (){
sim808.print ("AT+CGNSINF");
sim808.print ("\n");
Serial.println("State :"+state);
Serial.println("Time :"+timegps);
Serial.println("Latitude :"+latitude);
Serial.println("Longitude :"+longitude);
sim808.print("AT+CMGS="");
sim808.print(phone_no3);
sim808.println(""");
sim808.println("HELLO THIS IS RAYMARK DURO I AM ON A EMERGENCY RIGHT NOW PLEASE DO CONTACT ME AT MY NUMBER 09513927267 AND I AM LOCATED AT : ");
sim808.print("Google Maps");
sim808.print(latitude);
sim808.print(",");
sim808.print (longitude);
delay(500);
sim808.println((char)26); // End AT command with a ^Z, ASCII code 26
sim808.println();
sim808.flush();
Serial.println ("done 3");
delay (10000);
}

void gpsEmergency4 (){
sim808.print ("AT+CGNSINF");
sim808.print ("\n");
Serial.println("State :"+state);
Serial.println("Time :"+timegps);
Serial.println("Latitude :"+latitude);
Serial.println("Longitude :"+longitude);
sim808.print("AT+CMGS="");
sim808.print(phone_no4);
sim808.println(""");
sim808.println("HELLO THIS IS RAYMARK DURO I AM ON A EMERGENCY RIGHT NOW PLEASE DO CONTACT ME AT MY NUMBER 09513927267 AND I AM LOCATED AT : ");
sim808.print("Google Maps");
sim808.print(latitude);
sim808.print(",");
sim808.print (longitude);
delay(500);
sim808.println((char)26); // End AT command with a ^Z, ASCII code 26
sim808.println();
sim808.flush();
Serial.println ("done 4");
delay (10000);
}

void gpsEmergency5 (){
sim808.print ("AT+CGNSINF");
sim808.print ("\n");
Serial.println("State :"+state);
Serial.println("Time :"+timegps);
Serial.println("Latitude :"+latitude);
Serial.println("Longitude :"+longitude);
sim808.print("AT+CMGS="");
sim808.print(phone_no5);
sim808.println(""");
sim808.println("HELLO THIS IS RAYMARK DURO I AM ON A EMERGENCY RIGHT NOW PLEASE DO CONTACT ME AT MY NUMBER 09513927267 AND I AM LOCATED AT : ");
sim808.print("Google Maps");
sim808.print(latitude);
sim808.print(",");
sim808.print (longitude);
delay(500);
sim808.println((char)26); // End AT command with a ^Z, ASCII code 26
sim808.println();
sim808.flush();
Serial.println ("done 5");
delay (10000);
}

void sendTabData(String command , const int timeout , boolean debug){
sim808.println(command);
long int time = millis();
int i = 0;
while((time+timeout) > millis()){
while(sim808.available()){
char c = sim808.read();
if (c != ',') {
data +=c;

  • delay(50);// delay(100);*
  • } else {i++;}*
  • if (i == 7){*
  • delay(100);*
  • goto exitL;*
  • }*
    }
    }
    exitL:
    if (debug){
    state = data[1];
    timegps = data[2];
    latitude = data[3];
    longitude =data[4];
    gspeed =data[6];
    memset(data, 0, sizeof(data));
    }
    }
    String sendData (String command , const int timeout ,boolean debug){
    String response = "";
    sim808.println(command);
    long int time = millis();
    int i = 0;
    while ( (time+timeout ) > millis()){
    while (sim808.available()){
  • char c = sim808.read();*
  • response +=c;*
    }
    }
    if (debug){
    if (response.indexOf(phone_no)>=0){bAdmin=1;}
    if (response.indexOf("Get Location")>=0){bGetloc=1;}
    if (response.indexOf("Help")>=0){bHelp=1;}
    if (response.indexOf("Clear Messages")>=0){bClrmsg=1;}
    if (response.indexOf("Reset")>=0){bClrst=1;}
    Serial.print(response);
    }
    return response;
    }
    void sendMessage(String msg){
    sim808.print("AT+CMGS="");
    sim808.print(phone_no);
    sim808.println(""");
    sim808.print(msg);
    delay(50);
    sim808.println((char)26); // End AT command with a ^Z, ASCII code 26
    sim808.println();
    sim808.flush();
    Serial.println(msg);}
    void Buttonpressing () { if (digitalRead(buttonpin)==HIGH){Serial.println("button is pressed"); delay (3000);
    *gpsEmergency(); *
    *gpsEmergency2(); *
    *gpsEmergency3(); *
    *gpsEmergency4(); *
    *gpsEmergency5(); *
    }
    }
    that is the continuation guys of my code
3

Please correct your post above and add code tags around your code:
[code]`` [color=blue]// your code is here[/color] ``[/code].

It should look like this:// your code is here
(Also press ctrl-T (PC) or cmd-T (Mac) in the IDE before copying to indent your code properly)

4

what are you trying to do here

if (sim808.available()>0){Serial.write(sim808.read());}
atmsg = sim808.readString();

Because you read a single byte and write that to Serial and then store the rest in atmsg. atmsg is going to be missing the first char.

5

How is it gonna miss the first char sir?

6

once you do sim808.read() you read a single character and write that to the Serial, then you dosim808.readString()which reads whatever is left. And please do as requested in reply #2.

7

Okay sir thanks I will do it now

8

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