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* remove migrated documentation All of these are present now on our https://devices.esphome.io/ site. The missing ones were pushed with https://github.com/esphome/esphome-devices/pull/385, and the rest ones were already in, thus removing here the duplicates. * Update modbus.rst * Update modbus.rst * Update modbus_controller.rst * Update ltr390.rst * Update ltr390.rst * Update modbus_controller.rst * fix broken links * Update index.rst * Update index.rst
52 lines
1.9 KiB
ReStructuredText
52 lines
1.9 KiB
ReStructuredText
.. _modbus:
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Modbus Component
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================
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.. seo::
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:description: Instructions for setting up Modbus in ESPHome.
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:keywords: Modbus
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The Modbus protocol is used by many consumer and industrial devices for communication.
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This component allows components in ESPHome to communicate to those devices.
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Modbus requires a :ref:`UART Bus <uart>` to communicate.
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.. code-block:: yaml
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# Example configuration entry
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uart:
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...
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modbus:
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Configuration variables:
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------------------------
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- **flow_control_pin** (*Optional*, :ref:`config-pin`): The pin used to switch flow control.
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This is useful for RS485 transceivers that do not have automatic flow control switching,
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like the common MAX485.
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- **send_wait_time** (*Optional*, :ref:`config-time`): Time in milliseconds before a new modbus command is sent if an answer from a previous command is pending. Defaults to 250 ms.
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If multiple modbus devices are attached increasing this value can help avoiding to to overlapping reads.
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When 2 devices are sending a command at the same the response read from uart can't be assigned to the proper design.
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This value defines the maximum queuing time for a command before it is send anyways.
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- **disable_crc** (*Optional*, boolean): Ignores a bad CRC if set to ``true``. Defaults to ``false``
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See Also
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--------
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- :doc:`/components/modbus_controller`
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- :doc:`/components/sensor/modbus_controller`
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- :doc:`/components/binary_sensor/modbus_controller`
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- :doc:`/components/text_sensor/modbus_controller`
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- :doc:`/components/switch/modbus_controller`
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- :doc:`/components/number/modbus_controller`
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- :doc:`/components/output/modbus_controller`
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- `EPEVER MPPT Solar Charge Controller (Tracer-AN Series) <https://devices.esphome.io/devices/epever_mptt_tracer_an>`__
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- `Modbus RTU Protocol Description <https://www.modbustools.com/modbus.html>`__
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- :ref:`uart`
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- :apiref:`modbus/modbus.h`
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- :ghedit:`Edit`
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