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IFTTT + Twitter + Arduino + ESP8266 = #IOTcoolness

Intro:

It’s been really long since my last post. Well, I couldn’t find something worth sharing, or should I say , I wasn’t working on something cool which is worth sharing.

Finally, after such a long silence, I have something to share, which seems cool to me.

I used Arduino Uno coupled with ESP8266 wifi module to post tweets of sensor values on twitter using IFTTT & Maker Channel.

Background story:

After reading & watching couple of blog posts & videos about, how hackers from around the world have built really smart and kickass IoT & home automation applications using IFTTT, I couldn’t wait myself to jump start building one. I just can’t stop myself thinking of unlimited possibilities that you can built around it.
And thanks to Maker Channel, you need nothing more than an Arduino and Internet Connectivity to build cool IoT IFTTT application.

Action Plan:

For starters, I decided to build a simple application, which involves Arduino Uno + ESP-01 + couple of sensors and with help of IFTTT + Maker Channel, post a tweet of current sensor reading, periodically.

Execution:

First, Arduino configures ESP-01 module and joins Access Point.
In this case, ESP-01 set to softAP+station mode and joins Smartphone Hotspot point.

Arduino Uno will process sensor signals. In this case, Reads Analog pins A0, A1 & A2.
Next, Arduino will take care of assembling the GET request, with right event name & sensor values [upto three allowed] and Secret key.

[Secret key is generated, when you connect your account to the maker channel and create recipe using that. Visit ifttt.com to learn more.]

In this case, packet with right GET request is assembled which will trigger maker channel.
[Packet = GET /trigger/”your-trigger-name”/with/key/”your-secret-key”/?value1=” ”&value2=” ”&value3=” ” HTTP/1.1\r\nHost: maker.ifttt.com\r\n\r\n]

Further, Arduino will transmit assembled packet over ESP-01 WiFi, connected to internet.

Here, ESP-01 starts TCP/IP connection and triggers Maker Channel with real-time sensor values, on every minute. Further, triggers to Maker Channel, fires Tweet.

Hardware Used:
  • Arduino Uno.
  • ESP-01[V1.4 AT SDK]
  • Photo sensor – LDR.
  • Temperature Sensor - LM35.
  • Smartphone with Internet + Hotspot.
  • Cup of Tea.

Software Used:
  • Codeblocks Arduino IDE.
  • ESP8266 library [modified for V1.4 AT SDK].
  • IFTTT Account with My IF recipe.
  • Music player with deadmau5 Mix.

Results:

Future Plans:

Pollution is one of the biggest threat in front of India and World. I am going to build a device which will monitor pollution levels in surrounding, using gas & dust sensor and post a tweet of current levels. I am looking forward to build it as an Open Source project, and promote it with support of community & crowdfunding.  Let’s build something Innovative.

Resources:

http://randomnerdtutorials.com/posting-a-tweet-with-the-esp8266/

https://developer.mbed.org/users/mbedAustin/code/IFTTT/file/935972c2f628/ifttt.cpp [Line no 107 only]

www.ifttt.com


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