AnovaMaster

AnovaMaster acts as a bridge between an Anova immersion sous vide device and an MQTT bus. It broadcasts current status of the cooker on a given MQTT channel, and receives commands to control the device.

It was written to integrate with Home Assistant using the MQTT HVAC component. But should work well with any other automation system.

Requirements

• Any Bluetooth adapter supported by Linux should work. I've only ever tested this running on a Raspberry Pi Zero W, though.
• Python 2. Sorry.

Installation

• Check out the code and change in to the new directory.

• Install dependencies

  $ sudo apt-get install libglib2.0-dev virtualenv

• Create and activate a python virtual environment

  $ virtualenv venv
  $ . venv/bin/activate

• Install dependencies

  $ pip install -r requirements.txt

• Create a configuration file. Refer to comments in the config file for how to set it up.

  $ cp config/AnovaMaster.cfg.sample config/AnovaMaster.cfg
  $ nano config/AnovaMaster.cfg

• Run it.

  $ ./run.py

Status packet

AnovaMaster broadcasts regular status messages to MQTT. The payload of these is a JSON packet with the following format:

    {
      "state": "running",
      "current_temp": "140",
      "target_temp": "140",
      "temp_unit": "F"
    }

state

The state field will be one of

• "stopped"
• "running"
• "disconnected"

Temperatures

Temperatures are represented as a string, accurate to one decimal place. The temp_unit field will be one of

• "C"
• "F"

Timer status packet

AnovaMaster broadcasts regular timer status messages to MQTT. The payload of these is a JSON packet with the following format:

    {
     "timer": "1440",
     "timer_state": "running"
    }

timer_state

The state field will be one of

• "stopped"
• "running"

timer

timer is the current value in minutes.

Sending commands

AnovaMaster currently supports turning the Anova on/off, and setting the temperature. Each can be done by sending a message with the topic as configured in the config file.

Setting state

The payload should be one of these strings

• "stopped" - turn the Anova off
• "running" - turn the Anova on

Setting temperature

The payload should be a float. AnovaMaster will set it as the desired temperature in whichever unit the Anova is currently set to. The temperature must be inside these limits, otherwise it will be discarded:

Setting timer

The payload should be an integer. AnovaMaster will set it as the desired timer

Setting timer state

The payload should be one of these strings

• "stopped" - turn the timer off
• "running" - turn the timer on

Integration with Home Assistant

I'm using the following in my configuration.yaml to integrate with this script:

climate:
  - platform: mqtt
    name: Sous vide
    modes:
      - "off"
      - heat
    current_temperature_topic: anova/status
    current_temperature_template: "{{ value_json.current_temp }}"
    temperature_state_topic: anova/status
    temperature_state_template: "{{ value_json.target_temp }}"
    mode_state_topic: anova/status
    mode_state_template: "{{ value_json.state }}"
    mode_command_topic: anova/command/run
    temperature_command_topic: anova/command/temp
    send_if_off: true
    min_temp: 30
    max_temp: 250
    temp_step: 0.5

sensor:
  - platform: mqtt
    name: Sous vide
    state_topic: anova/timer
    value_template: "{{ (value_json.timer | int) }}"
    icon: 'mdi:timer'

switch:
  - platform: mqtt
    name: Sous Vide Timer
    state_topic: anova/timer
    command_topic: anova/command/timer_run
    payload_on: heat
    payload_off: "off"
    state_on: heat
    state_off: "off"
    optimistic: false
    retain: true
    value_template: "{{ value_json.timer_state }}"
    icon: 'mdi:timer'

sudo cp anova.service /lib/systemd/system/
sudo systemctl enable anova.service
sudo systemctl start anova.service