Connecting Arduino Uno with ThingSpeak using ESP 8266 Wi-Fi Module

Connecting Arduino Uno with ThingSpeak using ESP 8266 Wi-Fi Module

We will connect ARDUINO with ThingSpeak using TCP Connection and HTTP port with GET method.

Required:

1-      Arduino Uno

2-      ESP 8266

3-      Jumper Wires

4-      Account on ThingSpeak

Circuit Diagram:

·         ESP Vcc, and CH_PD PIN to Arduino 3.3V

·         ESP GND PIN to Arduino GND Pin

·         ESP RXD to Arduino pin 1 (TX)

·         ESP TXD to Arduino pin 0 (RX)

Testing circuit:

Open serial monitor and enter “AT”. The response should be “OK”, otherwise your circuit is not properly connected.

ACCOUNT on ThingSpeak:

Visit www.thingspeak.com and click on the "Get Started" button to make a free account.

Now click on the "New Channel" (second image above). Give it a name and select two fields. If you want you can fill more info about your channel, e.g. Latitude and Longitude of your sensor. If you want to share sensor info with your friends (and more...) click on the "Make Public?" check box option. Finally click on the "Save Channel" button.

Click on your new channel and select the API keys tab.

Copy GET Method for Write/ Send, using Write API Key, as follows:

“GET https://api.thingspeak.com/update?api_key=1XJX1M2RYNSTC2FW&field1=0”

Connecting with WIFI:

In serial monitor type following commands:

AT+CWMODE=1 // This is to program ESP for basic connection mode

AT+CWJAP="Android","12345678" // This command connects with SSID= Android with PW= 12345678

Creating a TCP Connection and sending data:

In serial monitor type following commands:

AT+CIPSTART="TCP","184.106.153.149",80 // The IP is for ThingSpeak website

AT+CIPSEND=52 // This is the length of the text we will send using GET Method

GET /update?api_key=QLOQF4XBLZPIOHIL&field1=65\r\n // In get method, use your API Write key and remove thingspeak domain address. Must add “\r\n” at the end.

If all above commands go well, the you will get some response, otherwise after some time connection will get closed.