Mongoose OS & AWS IoT - UART and Thing Shadow example (Javascript)

Overview

This app does two things.

• Reading UART 0 of ESP8266 and sending it to AWS IoT
• Sending device metadata and two pins state to AWS IoT

How to install this app

Step 1: Import

Via MOS UI tool

• Install and start mos tool
• Switch to the Project page, find and import this app(if available otherwise follow the steps below), build and flash it:

Flash the app through command line

• Clone this repo git clone https://github.com/mongoose-os-apps/aws-uart
• Go into the directory aws-uart and run mos build --arch esp8266 ( Change the arch respectively )
• After that, you should see a build directory in the current directory which will have the fw.zip binary
• Run mos flash which flashes the current build
• Run mos console and check

Step 2: Set up Wi-Fi

• You can do this via mos tool UI or use command mos wifi WIFI_NAME WIFI_PASSWORD

Note that mos talks to the device using RPC mechanism. RPC can talk over serial (uart), http, mqtt. By default, mos talks via uart. but aws-uart example takes over uart, therefore mos RPC does not work. You need to use another RPC channel - for example websocket. Therefore, update mos.yml, put your wifi credentials there, then build/flash, see what IP address is assigned to your board, and start mos as mos --port ws://IP_ADDRESS/rpc.

Step 3: Set up and Provision AWS IoT thing, Policy

• You can do this via mos tool UI or use command mos aws-iot-setup --aws-iot-policy mos-default
• Create a thing in AWS IoT and you are done
• Test this by going into AWS IoT MQTT test Console by subscribing to mos/# with QoS 1

Video