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ESPHome truma_inetbox component

ESPHome component to remote control Truma CP Plus Heater by simulating a Truma iNet box.

See 1 and 2 for great documentation about how to connect an CP Plus to an ESP32 or RP2040.

Acknowledgements

This project is based on the work of the WomoLIN project and mc0110 inetbox.py, especially the initial protocol decoding and the inet box log files.

Example configuation

This example is just for connecting ESPHome to the CP Plus. See truma.yaml for an example config with all possible things configured.

esphome:
  name: "esphome-truma"

external_components:
  - source: github://Fabian-Schmidt/esphome-truma_inetbox
    components: ["truma_inetbox"]

esp32:
  board: mhetesp32devkit

uart:
  - id: lin_uart_bus
    baud_rate: 9600
    stop_bits: 2

truma_inetbox:
  uart_id: lin_uart_bus

binary_sensor:
  - platform: truma_inetbox
    name: "CP Plus alive"
    type: CP_PLUS_CONNECTED

sensor:
  - platform: truma_inetbox
    name: "Current Room Temperature"
    type: CURRENT_ROOM_TEMPERATURE
  - platform: truma_inetbox
    name: "Current Water Temperature"
    type: CURRENT_WATER_TEMPERATURE
  - platform: truma_inetbox
    name: "Target Room Temperature"
    type: TARGET_ROOM_TEMPERATURE
  - platform: truma_inetbox
    name: "Target Water Temperature"
    type: TARGET_WATER_TEMPERATURE

ESPHome components

This project contains the following ESPHome components:

  • truma_inetbox has the following settings:
    • cs_pin (optional) if you connect the pin of your lin driver chip.
    • fault_pin (optional) if you connect the pin of your lin driver chip.
    • on_heater_message (optional) ESPHome Trigger when a message from CP Plus is recieved.

Requires ESP Home 2023.4 or higher.

Binary sensor

Binary sensors are read-only.

binary_sensor:
  - platform: truma_inetbox
    name: "CP Plus alive"
    type: CP_PLUS_CONNECTED

The following type values are available:

  • CP_PLUS_CONNECTED
  • HEATER_ROOM
  • HEATER_WATER
  • HEATER_GAS
  • HEATER_DIESEL
  • HEATER_MIX_1
  • HEATER_MIX_2
  • HEATER_ELECTRICITY
  • HEATER_HAS_ERROR
  • TIMER_ACTIVE
  • TIMER_ROOM
  • TIMER_WATER

Climate

Climate components support read and write.

climate:
  - platform: truma_inetbox
    name: "Truma Room"
    type: ROOM
  - platform: truma_inetbox
    name: "Truma Water"
    type: WATER

The following type values are available:

  • ROOM
  • WATER

Number

Number components support read and write.

number:
  - platform: truma_inetbox
    name: "Target Room Temperature"
    type: TARGET_ROOM_TEMPERATURE

The following type values are available:

  • TARGET_ROOM_TEMPERATURE
  • TARGET_WATER_TEMPERATURE
  • ELECTRIC_POWER_LEVEL
  • AIRCON_MANUAL_TEMPERATURE

Select

Select components support read and write.

select:
  - platform: truma_inetbox
    name: "Fan Mode"
    type: HEATER_FAN_MODE_COMBI

The following type values are available:

  • HEATER_FAN_MODE_COMBI
  • HEATER_FAN_MODE_VARIO_HEAT
  • HEATER_ENERGY_MIX_GAS
  • HEATER_ENERGY_MIX_DIESEL

Sensor

Sensors are read-only.

sensor:
  - platform: truma_inetbox
    name: "Current Room Temperature"
    type: CURRENT_ROOM_TEMPERATURE

The following type values are available:

  • CURRENT_ROOM_TEMPERATURE
  • CURRENT_WATER_TEMPERATURE
  • TARGET_ROOM_TEMPERATURE
  • TARGET_WATER_TEMPERATURE
  • HEATING_MODE
  • ELECTRIC_POWER_LEVEL
  • ENERGY_MIX
  • OPERATING_STATUS
  • HEATER_ERROR_CODE

Actions

The following ESP Home actions are available:

  • truma_inetbox.heater.set_target_room_temperature
    • temperature - Temperature between 5C and 30C. Below 5C will disable the Heater.
    • heating_mode - Optional set heating mode: "OFF", ECO, HIGH, BOOST.
  • truma_inetbox.heater.set_target_water_temperature
    • temperature - Set water temp as number: 0, 40, 60, 80.
  • truma_inetbox.heater.set_target_water_temperature_enum
    • temperature - Set water temp as text: "OFF", ECO, HIGH, BOOST.
  • truma_inetbox.heater.set_electric_power_level
    • watt - Set electricity level to 0, 900, 1800.
  • truma_inetbox.heater.set_energy_mix
    • energy_mix - Set energy mix to: GAS, MIX, ELECTRICITY.
    • watt - Optional: Set electricity level to 0, 900, 1800
  • truma_inetbox.aircon.manual.set_target_temperature
    • temperature - Temperature between 16C and 31C. Below 16C will disable the Aircon.
  • truma_inetbox.timer.disable - Disable the timer configuration.
  • truma_inetbox.timer.activate - Set a new timer configuration.
    • start - Start time.
    • stop - Stop time.
    • room_temperature - Temperature between 5C and 30C.
    • heating_mode - Optional: Set heating mode: "OFF", ECO, HIGH, BOOST.
    • water_temperature - Optional: Set water temp as number: 0, 40, 60, 80.
    • energy_mix - Optional: Set energy mix to: GAS, MIX, ELECTRICITY.
    • watt - Optional: Set electricity level to 0, 900, 1800.
  • truma_inetbox.clock.set - Update CP Plus from ESP Home. You must have another clock source configured like Home Assistant Time, GPS or DS1307 RTC.

TODO

  • This file
  • Testing of Combi 4E / Combi 6E and Alde devices (I only have access to an Combi 4)
  • More Testing