// This #include statement was automatically added by the Spark IDE.
#include "HttpClient/HttpClient.h"

#include "application.h"

int sensorPin = A0, powerPin = D6;

char APIKEY[] = "????????????????"; //thingspeak API key
char status[256] = "";
char IPADDRESS[] = "api.thingspeak.com";
char URL[] = "/update";

const int updateThingSpeakInterval = 60 * 1000; // Time interval in
milliseconds to update ThingSpeak (number of seconds * 1000 = interval)
unsigned int nextTime = 0;    // Next time to contact the server

HttpClient http;
http_request_t request;
http_response_t response;

http_header_t headers[] = {
    //  { "Content-Type", "application/json" },
    //  { "Accept" , "application/json" },
    { "X-THINGSPEAKAPIKEY" , APIKEY },
    { "Content-Type", "application/x-www-form-urlencoded" },
    { NULL, NULL } // NOTE: Always terminate headers with NULL
};


void setup() {
    pinMode(sensorPin, INPUT);
    pinMode(powerPin, OUTPUT);
}
	
void loop() {
    int val;
    if (nextTime > millis()) {
        return;
    }
				    
    request.hostname = IPADDRESS;
    request.port = 80;
    request.path = URL;
			
    digitalWrite(powerPin, HIGH);
    val = analogRead(sensorPin);
    digitalWrite(powerPin, LOW);
	
    request.body = "field1=" + String(val, DEC);
    /*
    if you want to send more than one field at the
    same time (multiple sensors etc) you can do the following:
    request.body = { "field1=" + String(val, DEC)
                     + "&" + "field2=" + String(val2, DEC) // Do not omit
                     + "&" + "field3=" + String(val3, DEC) // the &
    };
    */
    http.post(request, response, headers);
		    
    nextTime = millis() + updateThingSpeakInterval;
}