Lambda handler for the AWS IoT Button

(https://aws.amazon.com/iot/button/)

The IoT button sends 3 different events corresponding to the type of click. Single, Double or Long click. Right now I don't do anything special with these events other than sending a Slack notification.

Installation is somewhat manual at this point:

1. edit makefile to use proper AWS account number

2. copy config.json.example to config.json and edit (see below for encrypted Slack URL)

3. Make and deploy:

  make init
  make deploy-new

4. configure IoT button (see below)

5. set event source on lambda to the proper IoT button

  cp config.json.example config.json

configure the Slack channel, emoji, username etc to your liking

make a KMS key in the proper region, I called mine 'DefaultKey'

  aws kms encrypt --key-id alias/DefaultKey --plaintext "hooks.slack.com/services/....... (whatever your Slack webhook URL is)"

take that CiphertextBlob and drop it in config.json

TODO: need to fill this section in

• Logging to Dynamo
• Home Automation system integration
• SMS notifications