Mongoose OS DevKItC starter kit is recommended on AWS IoT portal and provides a quick way to start IoT development on microcontrollers.
This quick start guide and reference materials include the following:

  1. Install AWS CLI command line utility
  2. Follow AWS CLI configuration guide to setup your AWS credentials
  3. Make sure that aws iot list-things command works without errors
  1. Connect the device to your computer with a micro-USB cable
  2. Follow installation instructions to install mos tool on your computer
  3. Follow the Quickstart guide and finish steps 1-7. That should leave you with the device connected to your WiFi network
  4. Run mos aws-iot-setup command to provision your device to AWS IoT
Troubleshooting: post on Mongoose OS forum or talk on Mongoose OS chat