Can't send data to thingspeak api using GET HTTP

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joem
joem 2019-10-11
回答： Vinod 2019-10-21
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);
}

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回答（1 个）

Vinod
Vinod 2019-10-21
Have you tried using the ThingSpeak library: https://github.com/mathworks/thingspeak-arduino
I'd recommend starting with those examples as a reference.

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