I want to extract longitude and latitude from GSM/GPS module and then upload it to thingspeak. I am using sim808 GSM/GPS module and AT+CGPSINF=0 to get GPS location information sentence (CGPSINF: 0,6.823375,80.001038,36.300000,20170705124133.000,0,10,0.037040,47.410000 ). I want to extract longitude and latitude from it. Does anyone know how to do it? I am not an expert in programming. someone told me to use strtok. But I don't know how to do it. Does anyone have any Arduino code to do this?
I tried DFRobot SIM808 library to collect GPS data. it works like charm. But the problem was, my upload code didn't work when i was using the library to collect longitude and latitude in the same code.
This is my web upload code.
#include <SoftwareSerial.h>
#include <String.h>
SoftwareSerial mySerial(10, 11);//(2,3)
void setup()
{
mySerial.begin(2400); // the GPRS baud rate 9600
Serial.begin(2400); // the GPRS baud rate 9600
delay(1000);
ShowSerialData();
}
void loop()
{
Send2Pachube();
if (mySerial.available())
Serial.write(mySerial.read());
}
void Send2Pachube()
{
mySerial.println("AT");//start with attention
delay(1000);
mySerial.println("AT+CPIN?");//check for the sim card
delay(1000);
mySerial.println("AT+CREG?");//check for registration and access technology of cell
delay(1000);
mySerial.println("AT+CGATT?");//check whether the device is attached to GPRS.0Detch,1Attch
delay(1000);
mySerial.println("AT+CIPSHUT");//shut packet data protocol context
delay(1000);
mySerial.println("AT+CIPSTATUS");// returns the current connection status
delay(2000);
mySerial.println("AT+CIPMUX=0"); //create multi-IP connection(0=single connection)
delay(2000);
ShowSerialData();
mySerial.println("AT+CSTT=\"hutch3g\"");//start task and setting the APN,
delay(1000);
ShowSerialData();
mySerial.println("AT+CIICR");//bring up wireless connection
delay(3000);
ShowSerialData();
mySerial.println("AT+CIFSR");//get local IP adress
delay(2000);
ShowSerialData();
mySerial.println("AT+CGPSINF=0");//get GPS
delay(2000);
ShowSerialData();
mySerial.println("AT+CIPSPRT=0");//starts a TCP or UDP connection
delay(3000);
ShowSerialData();
mySerial.println("AT+CIPSTART=\"TCP\",\"api.thingspeak.com\",\"80\"");//start up the connection
delay(6000);
ShowSerialData();
mySerial.println("AT+CIPSEND");//begin send data to remote server
delay(4000);
ShowSerialData();
String str="GET https://api.thingspeak.com/update?api_key=FF19NVWMPZEWX0XK&field1=100";
mySerial.println(str);//begin send data to remote server
delay(4000);
ShowSerialData();
mySerial.println((char)26);//sending
delay(5000);//waitting for reply, important! the time is base on the condition of internet
mySerial.println();
ShowSerialData();
mySerial.println("AT+CIPSHUT");//close the connection
delay(100);
ShowSerialData();
}
void ShowSerialData()
{
while(mySerial.available()!=0)
Serial.write(mySerial.read());
}