Sim800L evb void setup problem

Using Arduino Programming Questions
1

Hi all,

I'm been working on a project using arduino nano, adafruit ultimate GPS breakout and sim 800l evb.
The idea is to create a GPS tracker and also be able to send an sms and remotely kill power using a relay in case it was lost or stolen.

i been working on tracker side code in the last few week and since all work fine i now start to implement relay and sms code.

The problem I'm having at the moment is merging the two codes into a single sketch

this is my code so far, at the moment i'm just using an "on/off led via sms" code that i found on the net
and i'm not including tracker code into void loop as it would be too long and i'm sure the problem is not
there.

But let me explain and show you better:

#include <Adafruit_GPS.h>
#include <gprs.h>
#include <SoftwareSerial.h>

#define SIM800_TX_PIN 8
#define SIM800_RX_PIN 7

SoftwareSerial serialSIM800(SIM800_TX_PIN,SIM800_RX_PIN);

SoftwareSerial serialGPS(3, 2);
Adafruit_GPS GPS(&serialGPS);
boolean usingInterrupt = false; 
void useInterrupt(boolean); 

#define TIMEOUT    5000
#define LED_PIN    13

GPRS gprs;



int fixflag = 0;
String apn_name = "everywhere";
String apn_user = "";
String apn_pwd = "";


void listenToSerial(long waitTime) {
  long timeNow = millis();
  do {
 
      if (serialSIM800.available()) {
        Serial.write(serialSIM800.read());
     }
  
        if (Serial.available()) {
         serialSIM800.write(Serial.read());
        }
     char c = GPS.read();
    c = GPS.read();
    if (GPS.newNMEAreceived()) {
      if (!GPS.parse(GPS.lastNMEA()))  
        return; 
    }
    
  }
  while ((timeNow + waitTime) > millis());
}


char currentLine[500] = "";
int currentLineIndex = 0;

bool nextLineIsMessage = false;

bool ledStatus = LOW;

int firstComma = -1;
int secondComma = -1;

bool isInPhonebook = false;

char *number = NULL;

void setupHTTPstuff() {
  listenToSerial(10000);
  GPS.sendCommand(PMTK_SET_NMEA_OUTPUT_RMCGGA);
  GPS.sendCommand(PMTK_SET_NMEA_UPDATE_1HZ);   // 1 Hz update rate
  GPS.sendCommand(PGCMD_ANTENNA);
  useInterrupt(true);
  delay(1000);
  serialGPS.println(PMTK_Q_RELEASE);
  serialSIM800.write("AT+SAPBR=0,1\n");
  listenToSerial(4000);
  serialSIM800.write("AT+SAPBR=3,1,\"APN\",\"everywhere\"\n");
  listenToSerial(1000);
  serialSIM800.write("AT+SAPBR=3,1,\"USER\",\"\"\n");
  listenToSerial(1000);
  serialSIM800.write("AT+SAPBR=3,1,\"PWD\",\" \"\n");
  listenToSerial(1000);
  serialSIM800.write("AT+HTTPTERM\n");
  listenToSerial(2000);
  serialSIM800.write("AT+HTTPINIT\n");
  listenToSerial(4000);
  serialSIM800.write("AT+SAPBR=1,1\n");
  listenToSerial(4000);
  serialSIM800.write("AT+HTTPPARA=\"CID\",1\n");
  listenToSerial(4000);

 
}


void setupsmsStuff() {


  Serial.println("Starting SIM800 SMS Command Processor");
  gprs.preInit();
  delay(1000);

  while (0 != gprs.init()) {
    delay(1000);
    Serial.print("init error\r\n");
  }

  if (0 != gprs.sendCmdAndWaitForResp("AT+CMGF=1\r\n", "OK", TIMEOUT)) {
    ERROR("ERROR:CMGF");
    return;
  }

  if (0 != gprs.sendCmdAndWaitForResp("AT+CNMI=1,2,0,0,0\r\n", "OK", TIMEOUT)) {
    ERROR("ERROR:CNMI");
    return;
  }

  Serial.println("Init success");
  Serial.println(ledStatus);
}



void setup() {
  Serial.begin(9600);
 while (!Serial);

 

  //Being serial communication with Arduino and SIM800
  serialSIM800.begin(9600);


    // initialize digital pin 13 as an output.
 pinMode(LED_PIN, OUTPUT);

  setupHTTPstuff();
  setupsmsStuff();
  


    GPS.begin(9600);



}




SIGNAL(TIMER0_COMPA_vect) {
  char c = GPS.read();
}

void useInterrupt(boolean v) {
  if (v) {
    // Timer0 is already used for millis() - we'll just interrupt somewhere
    // in the middle and call the "Compare A" function above
    OCR0A = 0xAF;
    TIMSK0 |= _BV(OCIE0A);
    usingInterrupt = true;
  } else {
    // do not call the interrupt function COMPA anymore
    TIMSK0 &= ~_BV(OCIE0A);
    usingInterrupt = false;
  }
}

uint32_t timer = millis();


void loop() {
  digitalWrite(LED_PIN, ledStatus);
  static char phonebook[13];
  int firstQuote = -1;
  int secondQuote = -1;
  int j = 0;

  //If there is serial output from SIM800
  if (gprs.serialSIM800.available()) {
    char lastCharRead = gprs.serialSIM800.read();
    if (lastCharRead == '\r' || lastCharRead == '\n') {
      String lastLine = String(currentLine);

      if (lastLine.startsWith("+CMT:")) {

       firstComma = lastLine.indexOf(',');
       Serial.println(firstComma);  //For debugging
       secondComma = lastLine.indexOf(',', firstComma + 1);
       Serial.println(secondComma); //For debugging

       firstQuote = lastLine.indexOf(34); //ASCII code for ""
       Serial.println(firstQuote);  //For debugging
       secondQuote = lastLine.indexOf(34, firstQuote + 1);
       Serial.println(secondQuote); //For debugging

       for (int i = firstQuote+1; i < secondQuote; ++i) {
        phonebook[j] = lastLine[i];
          ++j;
        }
       phonebook[j] = '\0';
       Serial.println(phonebook);
       number = phonebook;




        if (secondComma > 22) {
          Serial.println("In Phonebook"); 
          isInPhonebook = true;
          Serial.println(isInPhonebook);
        } else {
          Serial.println("Not in Phonebook"); 
        }

        Serial.println(lastLine);
        nextLineIsMessage = true;

      } else if ((lastLine.length() > 0) && (isInPhonebook)) {
        if (nextLineIsMessage) {
          Serial.println(lastLine);

          if (lastLine.indexOf("LED ON") >= 0) {
            ledStatus = 1;
            Serial.println(phonebook);
           gprs.sendSMS(number, "Done!"); 
           Serial.println(number); 
          } else if (lastLine.indexOf("LED OFF") >= 0) {
            ledStatus = 0;
             Serial.println(phonebook);
            gprs.sendSMS(number, "Done!"); 
           Serial.println(number);
            
          }

          nextLineIsMessage = false;
          isInPhonebook = false;
        }

      }
      
      for ( int i = 0; i < sizeof(currentLine);  ++i ) {
        currentLine[i] = (char)0;
      }
      currentLineIndex = 0;
    } else {
      currentLine[currentLineIndex++] = lastCharRead;
    }
  }
}

Now when i merge this two code i have a conflict because clearly arduino is trying to
Being serial communication with SIM800 whit this two comand

gprs.preInit();
 
&

serialSIM800.begin(9600);

When I cancel one of the two lines, however, it does not function or one of the two parts does not initialize.

I know it might be a stupid question but, your help would be very much appreciated.

Hope to have been clear enough in the explanation.

Many Thanks

Riccardo

2

if stolen or lost using a relay.

How could the device be stolen or lost using a relay?

Hope to have been clear enough in the explanation.

The explanation was OK. The snippets of code were not. Take your snippet problem to http://snippets-r-us.com. Maybe they can help you.

3

Hi PaulS,
Thank you very much for your suggestions. Will definitely be very useful.
I made some corrections and I hope it is much clearer now

4 
SoftwareSerial serialSIM800(SIM800_TX_PIN,SIM800_RX_PIN);

SoftwareSerial serialGPS(3, 2);

Only one instance of SoftwareSerial can listen at a time. If you are listening to the GPS, you are not listening to the SIM800.

If you are listening to the SIM800, you are not listening to the GPS.

Since you can't control when each device will send you data, you can NOT use two instances of SoftwareSerial to listen to the two devices.

You really need a Mega, with multiple hardware serial ports.

5

HI,

I got your point but i don't think that's the problem.

//Create software serial object to communicate with SIM800
SoftwareSerial serialSIM800(SIM800_TX_PIN,SIM800_RX_PIN);

//Create software serial object to communicate with Adafruit_GPS
SoftwareSerial serialGPS(3, 2);

with two instances of SoftwareSerial the code on my tracker is running perfectly.
i also tried to remove this line and run the code but the problem still there.
Any idea?

Regards

R

6

Any idea?

I have this crazy idea that you need to post a link to the library that contains the method that seems to be causing you problems.

7