Comfoair Q 350 MQTT bridge

This node script let you use a RaspBerry PI + usb tin to interact with the Comfoair Q 350 unit.

It does expose all known informations through MQTT and let you control the air flow via MQTT as well.

It does allow you to integrate the unit on Home Assistant as depicted below:

You can find the configuration YAML files in the docs folder.

How to run this

Provided you've the necessary hardware, you need to create the .env file based on the .env-sample file with the proper environment variables.

Prerequisites:

• node.js > 10
• pm2 installed (npm i pm2 -g)

Steps:

• clone this repository
• run npm i or yarn
• use pm2 start pm2.config.js

If you want to enable this project to run at startup then issue pm2 startup

MQTT commands

The following commands are available. just issue whatever payload you want to ${prefix}/commands/${key}

where ${key} is:

• ventilation_level_0
• ventilation_level_1
• ventilation_level_2
• ventilation_level_3
• boost_10_min
• boost_20_min
• boost_30_min
• boost_60_min
• boost_end
• auto
• manual
• bypass_activate_1h
• bypass_deactivate_1h
• bypass_auto
• ventilation_supply_only
• ventilation_supply_only_reset
• ventilation_extract_only
• ventilation_extract_only_reset
• ventilation_balance
• temp_profile_normal
• temp_profile_cool
• temp_profile_warm

Along with these above you can also use the ventilation_level key with the string 0 or 1, 2, 3 to set the desired fan speed level. There is also set_mode which accepts auto or manual as payload.

Credits

A lot of this repo was inspired by the reverse engineering here. If you'd like to know more how the unit communicates, head over

• here
• and here