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Add note about RS485 converter (#1372)

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Jesse Hills 2021-08-10 23:36:54 +12:00 committed by GitHub
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components/sensor/sdm_meter.rst
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@ -16,7 +16,8 @@ with ESPHome.
SDM220M Energy Monitor.
The communication with this integration is done over a :ref:`UART bus <uart>` using :ref:`Modbus <modbus>`.
The communication with this integration is done over a :ref:`UART bus <uart>` using the :ref:`Modbus protocol <modbus>`
over RS485 wiring. You will need an RS485 to UART converter for communication.
You must therefore have a ``uart:`` entry in your configuration with both the TX and RX pins set
to some pins on your board and the baud rate set to 9600.