Firebase Webhook (IFTTT) -> MQTT bridge

A simple firebase bridge that will take the topic and payload posted to a webhook and send it to a MQTT broker.

This is very helpful when connecting Google Home/Alexa/whatever to Home Assistant.

Some inspiration came from the IFTTT/Maker plugin for control4 and the HTTP to MQTT bridge for home assistant.

Getting started

• Create a project at Firebase.com
• firebase init

Configure firebase

Install Firebase tools:

$ npm install -g firebase-tools

Instantiate your project:

$ firebase init

Firebase has a lot of documentation on how to set up projects - we just followed their recommendations. Your mileage may very and do what you want to do ;)

App/MQTT Configuration

You will have to configure a handful of firebase config vars.

• firebase functions:config:set mqtt.server.port=12345
• firebase functions:config:set mqtt.server.host=mqtt://mxx.cloudmqtt.com
• firebase functions:config:set mqtt.server.user=username
• firebase functions:config:set mqtt.server.password=password
• firebase functions:config:set access.api_key=secretapikey

Deploy

After you configure your vars, you can then deploy:

$ firebase deploy

Like so:

harper@ {~/src/node-ifttt-mqtt-bridge/functions}$ firebase deploy 

=== Deploying to 'mqtttest'...

i  deploying functions
i  functions: ensuring necessary APIs are enabled...
i  runtimeconfig: ensuring necessary APIs are enabled...
✔  functions: all necessary APIs are enabled
✔  runtimeconfig: all necessary APIs are enabled
i  functions: preparing functions directory for uploading...
i  functions: packaged functions (2.29 KB) for uploading
✔  functions: functions folder uploaded successfully
i  starting release process (may take several minutes)...
i  functions: updating function post...
✔  functions[post_message]: Successful update operation.
✔  functions: all functions deployed successfully!

✔  Deploy complete!

Project Console: https://console.firebase.google.com/project/mqtttest/overview
Function URL (post_message): https://us-central1-mqtttest.cloudfunctions.net/post

Usage

Once you deploy you will get a URL: https://us-central1-mqtttest.cloudfunctions.net/post

You can use this url to send a topic and payload to the MQTT:

curl https://us-central1-mqtttest.cloudfunctions.net/post -d "topic=IFTTT/goodnight" -d "message=on" -d "key=apikey"

response:

payload posted sent!

You can send any topic or payload you want.

For instance:

curl https://us-central1-mqtttest.cloudfunctions.net/post -d "topic=IFTTT/goodnight" -d "message=on" -d "key=apikey"

IFTTT

You can put this into IFTTT Webhooks :

Choose your trigger (Google Home, SMS, etc). For the that you will need to choose the webhooks action:

You want to use the webhooks action.

Enter your URL: https://us-central1-mqtttest.cloudfunctions.net/post

Choose method POST

Choose content type application/x-www-form-urlencoded

enter your params: key=apikey&message=on&topic=ifttt/goodnight&created= {{CreatedAt}}

Hit save

Then execute your trigger (Hey Google, goodnight)

It should send the ifttt/goodnight topic to the MQTT broker. Home assistant or whatever can execute based on that topic.

Why firebase?

Firebase is easy to use, and more importantly, is free for our usage.

Contribute

1. Fork the repo
2. Make a pull request
4. Profit