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307 lines
12 KiB
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VBus Component
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==============
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.. seo::
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:description: Instructions for integrating a solar energy collector controller using VBus protocol in ESPHome.
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:image: resol_deltasol_bs_plus.jpg
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:keywords: VBUS RESOL SOLAR
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The ``VBus`` Component provides status reading connectivity to solar heat energy collector controllers using VBus
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protocol. These devices are mainly produced by Resol, often also found under different brand names like Viessmann,
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Kioto, Wagner etc. The component currently supports natively the models in the table below
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but any device can be added via lambda by knowing `its packet structure <https://danielwippermann.github.io/resol-vbus>`__.
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.. figure:: ../images/resol_deltasol_bs_plus.jpg
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:align: center
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Supported Models
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----------------
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The following table shows the currently supported models of Vbus devices.
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.. csv-table:: Supported Models
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:header: "Name", "Config Value", "Hex Address", "Notes"
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"DeltaSol BS Plus","deltasol_bs_plus","4221"
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"DeltaSol BS 2009","deltasol_bs_2009","427B","DeltaSol BS Plus V2"
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"Dux H3214","deltasol_bs_2009","427B", "Pump 2 unsupported"
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"DeltaSol C","deltasol_c","4212"
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"DeltaSol CS2","deltasol_cs2","1121"
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"DeltaSol CS2 Plus","deltasol_cs2_plus","2211"
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The ``Config Value`` should be used for the ``model`` parameter in your ``sensor`` and ``binary_sensor`` entries.
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The ``Hex Address`` field is the value sent by a device in the ``from`` field of a message. To identify an unknown
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model, set the logger level to ``VERBOSE`` and look for lines like this in the log output:
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``[10:53:48][V][vbus:068]: P1 C0500 427b->0000: 0000 0000 (0)``
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The value before the ``->`` symbol is the device source address. If it matches one of the entries in the table above
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then that model should work with your unit.
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Hardware Connection
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-------------------
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The device must be connected via a :doc:`UART bus </components/uart>` supporting the receiving line only. The UART bus
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must be configured at the same speed of the module which is by default 9600bps. The controller outputs data every second.
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To connect to this and read data from the bus a level shifting is needed as the voltage is around 8V (direct connection
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would damage the MCU). For our read-only purposes it's
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sufficient to adapt the level appropriately to 3.3V using a circuit like below:
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.. figure:: ../images/resol_vbus_adapter_schematic.png
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:align: center
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An electrically isolated version using an opto-coupler:
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.. figure:: images/vbus_serial_optocoupler.png
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:align: center
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Another approach, with PCB design ready to be manufactured `can be found here <https://github.com/FatBeard/vbus-arduino-library/tree/master/pcb>`__.
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.. warning::
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Do not connect the GND pin of your module with the ground of Resol unit as that may damage the output port of it.
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The output of the device is symmetric, meaning that the signal is not referenced to the ground, but rather it's a
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differential signal between the two wires. However, the MCU references the signal against the ground, so the two
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grounds are not supposed to be connected to each other as can be seen in the circuit depicted above.
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Component
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---------
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.. code-block:: yaml
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# Example configuration entry
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uart:
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id: resol
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rx_pin: GPIO3
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baud_rate: 9600
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vbus:
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uart_id: resol
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logger:
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baud_rate: 0 # disable uart logger on ESP8266
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.. warning::
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If you are using the :doc:`logger` make sure you are not using the same pins for it or otherwise disable the UART
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logging with the ``baud_rate: 0`` option.
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Configuration variables:
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- **uart_id** (*Optional*, :ref:`config-id`): Manually specify the ID of the UART hub used to connect to the device.
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.. note::
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Functionality of the sensors depends on the type of the device and the scheme arrangement of the hydraulic
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system it controls. The actual arrangement number set up can be determined from the settings of the device. Please
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check the user manual and assess your arrangement to determine the functionality of each sensor and name them
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accordingly.
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Sensor
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------
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.. code-block:: yaml
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# Example configuration entry
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sensor:
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- platform: vbus
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model: deltasol_bs_plus
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temperature_1:
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name: Temperature 1
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temperature_2:
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name: Temperature 2
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temperature_3:
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name: Temperature 3
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temperature_4:
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name: Temperature 4
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pump_speed_1:
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name: Pump Speed 1
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pump_speed_2:
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name: Pump Speed 2
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operating_hours_1:
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name: Operating Hours 1
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operating_hours_2:
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name: Operating Hours 2
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heat_quantity:
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name: Heat Quantity
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time:
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name: Device Time
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version:
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name: Device firmware version
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Configuration variables:
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- **model** (**Required**): Specify the model of the connected controller. Choose one of the config values listed in the table of supported models above.
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Supported sensors:
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- for **deltasol_bs_plus** and **deltasol_bs_2009**: ``temperature_1``, ``temperature_2``, ``temperature_3``, ``temperature_4``, ``pump_speed_1``, ``pump_speed_2``, ``operating_hours_1``, ``operating_hours_2``, ``heat_quantity``, ``time``, ``version``.
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- for **deltasol_c**: ``temperature_1``, ``temperature_2``, ``temperature_3``, ``temperature_4``, ``pump_speed_1``, ``pump_speed_2``, ``operating_hours_1``, ``operating_hours_2``, ``heat_quantity``, ``time``.
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- for **deltasol_cs2**: ``temperature_1``, ``temperature_2``, ``temperature_3``, ``temperature_4``, ``pump_speed``, ``operating_hours``, ``heat_quantity``, ``version``.
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- for **deltasol_cs_plus**: ``temperature_1``, ``temperature_2``, ``temperature_3``, ``temperature_4``, ``temperature_5``, ``pump_speed_1``, ``pump_speed_2``, ``operating_hours_1``, ``operating_hours_2``, ``heat_quantity``, ``time``, ``version``, ``flow_rate``.
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All sensors are *Optional* and support all other options from :ref:`Sensor <config-sensor>`.
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.. note::
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Sensors are updated every time a data packet is sent by the device. Some models send data very often, possibly every second. If you are
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concerned about the load on the receiving database, you can add a ``throttle`` filter to the sensors.
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Binary Sensor
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-------------
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.. code-block:: yaml
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# Example configuration entry
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binary_sensor:
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- platform: vbus
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model: deltasol_bs_plus
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relay1:
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name: Relay 1 On
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relay2:
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name: Relay 2 On
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sensor1_error:
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name: Sensor 1 Fault
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sensor2_error:
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name: Sensor 2 Fault
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sensor3_error:
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name: Sensor 3 Fault
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sensor4_error:
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name: Sensor 4 Fault
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collector_max:
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name: Option Collector Max
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collector_min:
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name: Option Collector Min
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collector_frost:
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name: Option Collector Frost
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tube_collector:
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name: Option Tube Collector
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recooling:
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name: Option Recooling
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hqm:
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name: Option Heat Quantity Measurement
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Configuration variables:
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- **model** (**Required**): Specify the model of the connected controller. Choose one of the config values listed in the table of supported models above.
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Supported models:
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- **``deltasol_bs_plus``**: ``relay1``, ``relay2``, ``sensor1_error``, ``sensor2_error``, ``sensor3_error``, ``sensor4_error``, ``collector_max``, ``collector_min``, ``collector_frost``, ``tube_collector``, ``recooling``, ``hqm``.
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- **``deltasol_bs_2009``**: ``sensor1_error``, ``sensor2_error``, ``sensor3_error``, ``sensor4_error``, ``frost_protection_active``.
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- **``deltasol_c``**: ``sensor1_error``, ``sensor2_error``, ``sensor3_error``, ``sensor4_error``.
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- **``deltasol_cs2``**: ``sensor1_error``, ``sensor2_error``, ``sensor3_error``, ``sensor4_error``.
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- **``deltasol_cs_plus``**: ``sensor1_error``, ``sensor2_error``, ``sensor3_error``, ``sensor4_error``.
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- **``custom``**: See below.
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All binary sensors are *Optional* and support all other options from :ref:`Binary Sensor <config-binary_sensor>`.
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``custom`` VBus sensors
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-----------------------
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Devices on a VBus are identified with a source address. There can be multiple devices on the same bus,
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each device type has a different address.
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.. code-block:: yaml
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sensor:
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- platform: vbus
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model: custom
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dest: 0x10
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source: 0x1234
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command: 0x100
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sensors:
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- id: temp1
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name: Temp 1
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lambda: return ((x[1] << 8) + x[0]) / 10.0;
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Configuration variables:
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- **dest** (**Required**): The ``DFA`` value corresponding to your device (see below).
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- **source** (**Required**): The address corresponding to ``your device model`` (see below).
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- **command** (**Required**): The ``command`` corresponding to your device (see below).
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- **sensors** (**Required**): A list of :ref:`Sensor <config-sensor>` definitions that include a ``lambda`` to do the decoding and return a ``float`` value.
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- **lambda** (**Required**, :ref:`lambda <config-lambda>`): Code to parse a value from the incoming data packets and return it.
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The data packet is in a ``std::vector<uint8_t>`` called ``x``.
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``custom`` VBus binary sensors
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------------------------------
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Configuration variables:
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- **dest** (**Required**): The ``DFA`` value corresponding to your device (see below).
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- **source** (**Required**): The address corresponding to ``your device model`` (see below).
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- **command** (**Required**): The ``command`` corresponding to your device (see below).
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- **binary_sensors** (**Required**): A list of :ref:`Binary Sensor <config-binary_sensor>` definitions that include a ``lambda`` to do the decoding and return a ``bool`` value.
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- **lambda** (**Required**, :ref:`lambda <config-lambda>`): Code to parse a value from the incoming data packets and return it.
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The data packet is in a ``std::vector<uint8_t>`` called ``x``.
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To determine the correct values for the parameters above, visit `packet definitions list <http://danielwippermann.github.io/resol-vbus/#/vsf>`__. In the search field of the **Packets** table, enter the name of your device.
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To extract the values with a :ref:`lambda <config-lambda>`, look in the packet structure by clicking the **Bytes** link in the table. Each value is placed at an ``offset`` within the packet.
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For ``float`` values, let's look at the temperature example: the value is stored as a ``16``-bit value in ``2`` bytes little-endian format. Since it's always the second byte containing the upper byte, it needs to be shifted by ``8`` bits (multiplied by ``256``) (e.g. ``0x34, 0x12 -> 0x1234``). The result needs to be multiplied by the factor, which is ``0.1``, to obtain the correct values: ``((x[1] << 8) + x[0]) * 0.1f)``. The number within the square brackets is the ``[offset]``.
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For ``binary`` values, multiple binary values are stored within a single numeric value encoded with a bitmask. To extract the binary value all you have to do is to apply *bitwise AND* operator ``&`` between the value at the corresponding offset and the ``mask`` shown in the table.
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For example to decode some sensors of `DeltaSol BS Plus` via lambdas:
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.. code-block:: yaml
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# Example configuration entry
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sensor:
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- platform: vbus
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model: custom
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dest: 0x10
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source: 0x4221
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command: 0x100
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sensors:
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- id: scheme
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name: Arrangement scheme
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icon: mdi:pipe-wrench
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accuracy_decimals: 0
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entity_category: diagnostic
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lambda: return x[14]; // Configured arrangement scheme
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- id: temp2
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name: Temperature DHW
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state_class: measurement
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unit_of_measurement: "°C"
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lambda: return ((x[3] << 8) + x[2]) * 0.1f; // Temperature 2
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binary_sensor:
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- platform: vbus
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model: custom
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dest: 0x10
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source: 0x4221
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command: 0x100
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binary_sensors:
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- name: Heat Quantity Measurement On
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id: bin_hqm
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icon: mdi:counter
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lambda: return x[15] & 0x20; // Option Heat Quantity Measurement enabled
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See Also
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--------
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- :doc:`/components/uart`
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- :doc:`/components/binary_sensor/index`
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- :doc:`/components/sensor/index`
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- `Resol manuals <https://www.resol.de/en/dokumente>`__
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- `VBus protocol <https://danielwippermann.github.io/resol-vbus>`__
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- :ghedit:`Edit`
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