ESP8266 Community Forum

- Wed Apr 19, 2017 9:58 pm #65084 Hey guys so im having an issue,

i have the esp8266 module working with the arduino mega and they are communicating fine.
I am having issues sending information to thingspeak automatically when i run my code.

what i mean by this is that i am able to send data to thingspeak (thingspeak will display my data correctly) if i manually give the esp8266 AT commands.

e.x

AT+CIPSTART="TCP","184.106.153.149",80
AT+CIPSEND=54
GET /update?key=MYKEYHERE&field1=10

But once my program starts to run, serial monitor/plotter will display my data, but thingpseak isnt receiving anything.

this is the code i have written so far.

Please excuse me if i have not written this post in the correct way, this is my first post ever on here.

Code: Select all#include <SoftwareSerial.h>
#include <stdlib.h>
#define SSID "iPhone"
#define PASS "cristian890"


//  Variables

int PulseSensorPurplePin = 0;        // Pulse Sensor PURPLE WIRE connected to ANALOG PIN 0
int LED13 = 13;   //  The on-board Arduion LED


int Signal;                // holds the incoming raw data. Signal value can range from 0-1024
int Threshold = 550;            // Determine which Signal to "count as a beat", and which to ingore.

String GET = "**MYAPIKEY**";
SoftwareSerial ser(9, 10); //RX, TX


// The SetUp Function:

void setup() {
  pinMode(LED13, OUTPUT);        // pin that will blink to your heartbeat
  Serial.begin(9600);         // Set's up Serial Communication at certain speed.
  ser.begin(9600);

  // reset ESP8266
  ser.println("AT+RST");
}

// The Main Loop Function

void loop() {

  Signal = analogRead(PulseSensorPurplePin);  // Read the PulseSensor's value.
                                                               // Assign this value to the "Signal" variable.

  Serial.println(Signal);       // Send the Signal value to Serial Plotter.


  if (Signal > Threshold) {         // If the signal is above "550", then "turn-on" Arduino's on-Board LED.
    digitalWrite(LED13, HIGH);
  } else {
    digitalWrite(LED13, LOW);      //  Else, the sigal must be below "550", so "turn-off" this LED.
  }
}

boolean connectWiFi()
{
  Serial.println("AT+CWMODE=1");
  delay(2000);
  String com = "AT+CWJAP=\"";
  com += SSID;
  com += "\",\"";
  com += PASS;
  com += "\"";
  //sendDebug(cmd);
  delay(5000);
 
  //TCP connection

  String cmd = "AT+CIPSTART=\"TCP\",\"";
  cmd += "184.106.153.149"; // api.thingspeak.com
  cmd += "\",80";
  ser.println(cmd);

  if (ser.find("Error")) {
    Serial.println("AT+CIPSTART error");
    return;
  }

  // prepare GET string
  String getStr = "GET /update?api_key=";
  getStr += GET;
  getStr += "&field1=";
  getStr += String(Signal);
  getStr += "\r\n\r\n";

  // send data length
  cmd = "AT+CIPSEND=";
  cmd += String(getStr.length());
  ser.println(cmd);

  if (ser.find(">")) {
    ser.print(getStr);
  }
  else {
    ser.println("AT+CIPCLOSE");
    // alert user
    Serial.println("AT+CIPCLOSE");
  }

}