A9G Maduino Zero

[mike1739]

/A9G_AT_Commands_Test.ino) Using this sketch I am able to see GPS data etc not a problem. My next sketch to include GSM fails miserably using ....... https://how2electronics.com/gps-gsm-based-vehicle-tracking-system-using-arduino/ tutorial from How2 All I ever see is stuff like CME Error 52 or NO SIM ? Rgds Mike

[mike1739]

PS this is the code .. // https://www.makerfabs.cc/article/diy-gps-gsm-vehicle-tracking-system-on-maduino.html

include

define DEBUG true

int PWR_KEY = 9; int RST_KEY = 6; int LOW_PWR_KEY = 5;

String msg = String(""); int SmsContentFlag = 0; String mob; String loct; void setup() { pinMode(PWR_KEY, OUTPUT); pinMode(RST_KEY, OUTPUT); pinMode(LOW_PWR_KEY, OUTPUT); digitalWrite(RST_KEY, LOW); digitalWrite(LOW_PWR_KEY, HIGH); digitalWrite(PWR_KEY, HIGH);

// String msg = String(""); // int SmsContentFlag = 0;

SerialUSB.begin(9600); Serial1.begin(9600); //modulePowerOn(); delay(2000); SerialUSB.println("Checking Module..."); int i = 1; String res; while (i) { Serial1.println("AT"); while (Serial1.available() > 0) { if (Serial1.find("OK")) i = 0; } delay(500); } SerialUSB.println("Module Connected"); //GprsTextModeSMS(); SerialUSB.print("Text Mode: "); i = 1; while (i) { Serial1.println("AT+CMGF=1\r"); while (Serial1.available() > 0) { if (Serial1.find("OK")) i = 0; } delay(500); } SerialUSB.println("ON"); Serial1.println("AT+GPS=1"); SerialUSB.println("GPS Intializing..."); delay(5000); SerialUSB.println("GPS Initialized"); SerialUSB.flush(); i = 1; String str; while (i) { Serial1.println("AT+LOCATION=2"); delay(100); while (Serial1.available() <= 0); if (Serial1.find("AT+LOCATION=2")) { str = Serial1.readString(); //SerialUSB.println(str); i = 0; } delay(500); } loct = str.substring(4, 23); SerialUSB.print("Location: "); SerialUSB.println(loct); //while(1); SerialUSB.println("Send sms to get the location"); }

void loop() { char SerialInByte;

if (Serial1.available()) { //char SerialInByte; SerialInByte = (unsigned char)Serial1.read(); if ( SerialInByte == 13 ) //0x0D { ProcessGprsMsg(); } if ( SerialInByte == 10 ) { } else { //EN: store the current character in the message string buffer msg += String(SerialInByte); } } if (SmsContentFlag == 1) { int i; SerialUSB.println("Flag Cleared"); SerialUSB.print("Message: "); SerialUSB.println(msg); if (msg.indexOf("Location")) { SerialUSB.println("Message Received"); i = msg.indexOf("+91"); //SerialUSB.print("index: "); //SerialUSB.println(i); //SerialUSB.println(msg[i+1]); i = i + 3; for (int j = 0; j < 10; j++, i++) { mob += msg[i]; } SerialUSB.print("Mobile: "); SerialUSB.println(mob); String cmd = "AT+CMGS=\""; cmd += mob; cmd += "\""; cmd += "\r"; Serial1.println(cmd); delay(100);

  Serial1.print("Your Vehicle Current Location ");
  Serial1.print(loct);
  Serial1.print("\n");
  Serial1.print("Check Map: \n");
  Serial1.print(" https://www.google.com/maps/@");
  Serial1.println(loct);
  Serial1.println((char)26);
  delay(1000);
}
ClearGprsMsg();
SmsContentFlag = 0;
msg.remove(0);
mob.remove(0);

} delay(100); }

// EN: Request Text Mode for SMS messaging void GprsTextModeSMS() { Serial1.println( "AT+CMGF=1" ); }

void GprsReadSmsStore( String SmsStorePos ) { // Serial.print( "GprsReadSmsStore for storePos " ); // Serial.println( SmsStorePos ); Serial1.print( "AT+CMGR=" ); Serial1.println( SmsStorePos ); }

// EN: Clear the GPRS shield message buffer void ClearGprsMsg() { msg = ""; }

// EN: interpret the GPRS shield message and act appropiately void ProcessGprsMsg() { SerialUSB.println(""); // Serial.print( "GPRS Message: [" ); SerialUSB.print( msg ); // Serial.println( "]" ); if ( msg.indexOf( "Call Ready" ) >= 0 ) { SerialUSB.println( " GPRS Shield registered on Mobile Network " ); GprsTextModeSMS(); }

//EN: unsolicited message received when getting a SMS message if ( msg.indexOf( "+CIEV" ) >= 0 ) { SerialUSB.println( " SMS Received " ); }

//EN: SMS store readed through UART (result of GprsReadSmsStore request) if ( msg.indexOf( "+CMT:" ) >= 0 ) { // EN: Next message will contains the BODY of SMS SmsContentFlag = 1; // EN: Following lines are essentiel to not clear the flag! //ClearGprsMsg(); return; }

// EN: +CMGR message just before indicate that the following GRPS Shield message // (this message) will contains the SMS body if ( SmsContentFlag == 1 ) { SerialUSB.println( " SMS MESSAGE CONTENT " ); SerialUSB.println( msg ); SerialUSB.println( " END OF SMS MESSAGE " ); //ProcessSms( msg ); }

/ClearGprsMsg(); //EN: Always clear the flag SmsContentFlag = 0; / }