AWS IOT CORE-ESP8266

Overview

AWS IoT provides the cloud services that connect your IoT devices to other devices and AWS cloud services. AWS IoT provides device software that can help you integrate your IoT devices into AWS IoT-based solutions. If your devices can connect to AWS IoT, AWS IoT can connect them to the cloud services that AWS provides. AWS IoT can provide support for your compatible devices to facilitate the development and integration of your devices with AWS IoT. To help you manage and support your IoT devices in the field, AWS IoT communication supports MQTT (Message Queuing and Telemetry Transport) and HTTPS (Hypertext Transfer Protocol - Secure).

Concept

I have used a publishand subscribe method for current demonstration.ESP8266-12E module incuded as a microcontroller for the communication with AWS IoT Core.

Here we have some points to note:

• You must need an AWS IoT Core console/account for the demonstation.Details on below section (Steps).
• This concept works on ESP8266 Arduino Core v2.4.2 and v2.4.0.
• Communications are secured by TLS version 1.2. Arduino IDE & ESP8266 Suports TLS V1.2.
• AWS IoT Core supports MQTT and MQTT over WSS protocols. We are using MQTT over WSS method with sigv4 authentication and port 443.

Software

• Arduino IDE for Windows, Linux or Mac OS.

Steps :

1. Download the repo.

2. For those who don't have an AWS IoT core 😇 download the AWS IOT CORE WITH ESP8266 named pdf from the DOC folder and carefully read it. Create a dashboard with at least one thing. Create your AWS account here.

3. Open LIB folder from the downloaded repo then extract the ZIP file and place the four folders into your Arduino local directory folder (libraries). Folders(libraries) with name given below :

   • aws-mqtt-websockets-master
   • AWS-SDK-ESP8266
   • PubSubClient
   • WebSockets

   You have an alternate option to download the library from the Arduino library manager. But I am not suggesting that way in this case 👎.

4. The source code for our ESP8266 simulation can be found in the CODE folder. Open source code from the downloaded repo and make some changes as mentioned below :

• Open global.h and provide your wifi router's ssid and password :

• Open aws.cpp and fill your credentials here 👇 . For more info refer the document page number 9.

Compatibility

This library was tested with the NodeMCU V1.0 & ESP8266-12E board. It should also work with other standard ESP8266 that are compatible with the Arduino IDE. ESP8266 core version that I have tested is 2.4.2.

Working & Testing

Demonstration of publish and subscribe between ESP8266 and AWS IoT Core dashboard described in the documentation from page No:10 to 13.

WiFi Connection status :

Initial Publish and Subscribe status:

Subscribed message on ESP8266 form AWS IoT Core :