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228 lines
7.7 KiB
ReStructuredText
228 lines
7.7 KiB
ReStructuredText
MicroNova based pellet stove
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============================
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.. seo::
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:description: Instructions for setting up a MicroNova board based pellet stove in ESPHome.
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The MicroNova component allows you to integrate a pellet stove with a MicroNova board in ESPHome.
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It uses :ref:`UART <uart>` for communication.
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The :ref:`UART <uart>` must be configured with a baud rate 1200, 8 data bits, 2 stop bits, no parity, no flow control.
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.. warning::
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MicroNova bords come in various flavours. This code is only tested on an ExtraFlame Ketty Evo 2.0 stove. The protocol is not
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documented but has been reverse engineerd by others. See the links below for all the info that helped me.
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The different sensors, buttons and stove switch may require specific **memory_location** and **memory_address** parameters that
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match your MicroNova specific board.
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Also, switching your stove on or off can behave different on the various MicroNova flavours.
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Use this component at your own risk.
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Connecting your stove
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---------------------
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Most MicroNova based pellet stoves have a serial output. In most cases this output has 4 pins: GND, 5v, 20V and DATA.
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.. figure:: images/micronova_serial.png
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:align: center
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:width: 50.0%
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.. figure:: images/micronova_serial_layout.png
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:align: center
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:width: 50.0%
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You will have to build a simple circuit to interface with your stove. It is based on optocouplers for galvanic separation and logic
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level shifting between 5v and 3V3.
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.. figure:: images/micronova_optocouplers.png
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:align: center
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:width: 100.0%
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Optocoupler interface circuit (credit: philibertc)
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See the references below for all the details about te circuit.
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You can use the 5V output from the stove to power the ESP module, but you will have to put a voltage regulator in between to
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get 3v3.
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Component/Hub
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-------------
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.. code-block:: yaml
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micronova:
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enable_rx_pin: REPLACEME
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Configuration variables:
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~~~~~~~~~~~~~~~~~~~~~~~~
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- **enable_rx_pin** (**Required**, :ref:`config-pin`): Output pin to be used to switch the line between RX and TX.
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- **update_interval** (*Optional*, :ref:`config-time`): The interval that the sensors should be checked.
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Defaults to 60 seconds.
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.. note::
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For all text sensors, sensors, numbers, buttons and switches hereafter most of the the default **memory_location** and **memory_address** parameters will work so you should
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not specify them. However your Micronova boad may require you to specify alternate values. So every text sensor, button,
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switch or number accepts these parameters:
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- **memory_location** (*Optional*): The memory location where the parameter must be read. For most stoves this is 0x00 for RAM
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or 0x20 for EPROM.
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- **memory_address** (*Optional*): The address where the parameter is stored.
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Text Sensors
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------------
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.. code-block:: yaml
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text_sensor:
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- platform: micronova
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stove_state:
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name: Stove status
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Configuration variables:
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~~~~~~~~~~~~~~~~~~~~~~~~
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- **stove_state** (*Optional*): The current stove state.
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All options from :ref:`Text Sensor <config-text_sensor>`.
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Sensors
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-------
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.. code-block:: yaml
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sensor:
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- platform: micronova
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room_temperature:
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name: Room temperature
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fumes_temperature:
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name: Fumes temperature
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stove_power:
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name: Stove power level
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fan_speed:
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fan_rpm_offset: 240
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name: Fan RPM
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water_temperature:
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name: Water temperature
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water_pressure:
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name: Water pressure
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memory_address_sensor:
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memory_location: 0x20
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memory_address: 0x7d
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name: Custom Address sensor
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Configuration variables:
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~~~~~~~~~~~~~~~~~~~~~~~~
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- **room_temperature** (*Optional*): Sensor that reads the stoves ambient room temperature.
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All options from :ref:`Sensor <config-sensor>`.
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- **fumes_temperature** (*Optional*): Fumes temperature.
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All options from :ref:`Sensor <config-sensor>`.
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- **stove_power** (*Optional*): Current stove power.
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All options from :ref:`Sensor <config-sensor>`.
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- **fan_speed** (*Optional*): Current fan speed. The raw value from the stove is multiplied by 10 + ``fan_rpm_offset``.
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- **fan_rpm_offset** (*Optional*, integer): Offset the reported RPM value. Must be between 0 and 255. Defaults to 0.
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- All other options from :ref:`Sensor <config-sensor>`.
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- **water_temperature** (*Optional*): Internal boiler water termperature.
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All options from :ref:`Sensor <config-sensor>`.
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- **water_pressure** (*Optional*): Internal boiler water pressure.
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All options from :ref:`Sensor <config-sensor>`.
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- **memory_address_sensor** (*Optional*): Can be any **memory_location** / **memory_address** you want to track. Usefull
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when you don't know where the parameter is for your stove is.
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All options from :ref:`Sensor <config-sensor>`.
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Numbers
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-------
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.. code-block:: yaml
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number:
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- platform: micronova
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thermostat_temperature:
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name: Thermostat temperature
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step: 0.5
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power_level:
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name: Thermostat temperature
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Configuration variables:
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~~~~~~~~~~~~~~~~~~~~~~~~
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- **thermostat_temperature** (*Optional*): Number that holds the current stove thermostat value.
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- **step** (*Optional*): Temperature step. This value is used to multiply/devide the raw value when setting/reading the **thermostat_temperature**
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- All other options from :ref:`Number <config-number>`.
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- **power_level** (*Optional*): Number that sets/reads the requested stove power.
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All options from :ref:`Number <config-number>`.
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.. note::
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Besides **memory_location** and **memory_address** you can specify a specific **memory_write_location** parameter.
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This parameter is a hex value for the **memory_location** where the new thermostat value must be written.
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- **memory_write_location** (*Optional*): The **memory_location** where to write the new thermostat value.
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Buttons
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-------
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.. code-block:: yaml
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button:
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- platform: micronova
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custom_button:
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name: Custom button
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memory_location: 0x20
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memory_address: 0x7d
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memory_data: 0x08
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Configuration variables:
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~~~~~~~~~~~~~~~~~~~~~~~~
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- **custom_button** (*Optional*): Write the hex value **memory_data** to a **memory_location** and **memory_address**
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All options from :ref:`Button <config-button>`.
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.. note::
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Besides **memory_location** and **memory_address** you must specify a specific **memory_data** parameter.
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- **memory_data** (*Required*): The hex value to be written to the **memory_location** and **memory_address**.
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Switches
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--------
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.. code-block:: yaml
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switch:
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- platform: micronova
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stove:
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name: Stove on/off switch
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Configuration variables:
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~~~~~~~~~~~~~~~~~~~~~~~~
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- **stove** (*Optional*): Turn the stove on or off. This switch will also reflect the current stove state.
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If the **stove_state** is "Off" the switch will be off, in all other states, the switch wil be on.
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All options from :ref:`Switch <config-switch>`.
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.. note::
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Besides **memory_location** and **memory_address** you can specify specific **memory_data_on** and **memory_data_off** parameters.
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These parameters contain the hex value to be written to the **memory_location** and **memory_address** when the switch
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turns on or off.
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- **memory_data_on** (*Optional*): The data to write when turning the switch on.
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- **memory_data_off** (*Optional*): The data to write when turning the switch off.
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See Also
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--------
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- `ridiculouslab micronova <https://www.ridiculouslab.com/arguments/iot/stufa/micronova_en.php>`__
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- `philibertc / micronova_controller <https://github.com/philibertc/micronova_controller/>`__
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- `eni23 / micronova-controller <https://github.com/eni23/micronova-controller>`__
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- :ghedit:`Edit`
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