Can't send data to thingspeak api using GET HTTP

I build an arduino based device and connect a GSM900 module to it which can establish GPRS connection and visit website. Also I have created an account in thingspeak. I tested sending data to the field with the browser in my PC by visiting https://api.thingspeak.com/update?api_key=XXXXXXXXXXXXX&field1=0, and it does upload data and shows a number.

But when I try to do the same thing with the arduino based device, after

softSerial.println("GET https://api.thingspeak.com/update?api_key=XXXXXXXXXXXXX&field1=0");

It dosn't repond nor shows the number. Is there anything missing?

The following is the arduino sketch and all the at command before the line above shows "ok" result.

Also, is there a way to test this GSM900 module is able to get http?

#include <SoftwareSerial.h>

SoftwareSerial softSerial(51, 52);//

void setup() {

Serial.begin(9600);

softSerial.begin(9600);

Serial.println("Initing...please wait.");

softSerial.println("AT+CPIN?");

delay(500);

printLine();

softSerial.println("AT+CGATT?");

delay(500);

printLine();

softSerial.println("AT+CIPSHUT");

delay(500);

printLine();

softSerial.println("AT+CIPSTATUS");

delay(500);

printLine();

softSerial.println("AT+CIPMUX=0");

delay(500);

printLine();

softSerial.println("AT+CSTT=\"ZENNET\"");

delay(500);

printLine();

softSerial.println("AT+CIICR");

delay(3000);

printLine();

softSerial.println("AT+CIFSR");

delay(1000);

printLine();

//softSerial.println("AT+CIPSPRT=0");

// delay(1000);

// printLine();

softSerial.println("AT+CIPSTART=\"TCP\",\"api.thingspeak.com\",\"80\"");

//AT+CIPSTART="TCP","api.thingspeak.com","80"

delay(3000);

printLine();

softSerial.println("AT+CIPSEND");

delay(13000);

printLine();

softSerial.println("GET https://api.thingspeak.com/update?api_key=XXXXXXXXXXXXX&field1=0");

delay(20000);

printLine();

softSerial.println("\#026");

delay(3000);

printLine();

softSerial.println("AT+CIPSHUT");

delay(500);

printLine();

}

void loop() {

}

void printLine() {

String data;

while (softSerial.available() > 0)

{

char c = softSerial.read();

data += c;

}

Serial.println(data);

}

Answer 1

[Vinod]

Have you tried using the ThingSpeak library: https://github.com/mathworks/thingspeak-arduino

I'd recommend starting with those examples as a reference.