Documentation for BL0939 (Sonoff Dual R3 v2) (#1970)
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BL0939 Power Sensor
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====================
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.. seo::
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:description: Instructions for setting up BL0939 power sensors for the Sonoff Dual R3 v2
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:image: bl0939.png
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:keywords: bl0939, Sonoff Dual R3 v2
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The ``bl0939`` sensor platform allows you to use your BL0939 voltage/current/power and energy
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sensors with ESPHome. This sensor is commonly found in Sonoff Dual R3 v2.
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.. note::
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SAFETY HAZARD: Some devices such as Sonoff POWs/Shelly/etc, have the digital GND connected directly to mains voltage so **the GPIOs become LIVE during normal operation**. Our advice is to mark these boards to prevent any use of the dangerous digital pins.
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As the communication with the BL0939 done using UART, you need
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to have an :ref:`UART bus <uart>` in your configuration with the ``tx_pin`` and ``rx_pin`` connected to the BL0939.
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Additionally, you need to set the baud rate to 4800, parity to ``NONE`` and stop_bits to 2.
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.. code-block:: yaml
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# Example configuration entry
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# Disable logging over serial
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logger:
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baud_rate: 0
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uart:
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tx_pin: GPIO25
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rx_pin: GPIO26
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baud_rate: 4800
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parity: NONE
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stop_bits: 2
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sensor:
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- platform: bl0939
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update_interval: 30s
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voltage:
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name: 'BL0939 Voltage'
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current_1:
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name: 'BL0939 Current 1'
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current_2:
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name: 'BL0939 Current 2'
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active_power_1:
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name: 'BL0939 Active Power 1'
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active_power_2:
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name: 'BL0939 Active Power 2'
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energy_1:
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name: 'BL0939 Energy 1'
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energy_2:
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name: 'BL0939 Energy 2'
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energy_total:
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name: 'BL0939 Energy Total'
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.. note::
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The configuration above should work for Sonoff Dual R3 v2.
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Configuration variables:
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------------------------
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- **voltage** (*Optional*): Use the voltage value of the sensor in V (RMS).
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All options from :ref:`Sensor <config-sensor>`.
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- **current_1** (*Optional*): Use the current value of the channel 1 in amperes. All options from
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:ref:`Sensor <config-sensor>`.
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- **current_2** (*Optional*): Use the current value of the channel 2 in amperes. All options from
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:ref:`Sensor <config-sensor>`.
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- **active_power_1** (*Optional*): Use the (active) power value of the channel 1 in watts. All options from
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:ref:`Sensor <config-sensor>`.
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- **active_power_2** (*Optional*): Use the (active) power value of the channel 2 in watts. All options from
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:ref:`Sensor <config-sensor>`.
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- **energy_1** (*Optional*): Use the energy counter value of the channel 1 in kWh. All options from
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:ref:`Sensor <config-sensor>`.
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- **energy_2** (*Optional*): Use the energy counter value of the channel 2 in kWh. All options from
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:ref:`Sensor <config-sensor>`.
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- **energy_total** (*Optional*): Use the energy counter value of both channels in kWh. All options from
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:ref:`Sensor <config-sensor>`.
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- **update_interval** (*Optional*, :ref:`config-time`): The interval to check the
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sensor. Defaults to ``60s``.
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- **uart_id** (*Optional*, :ref:`config-id`): Manually specify the ID of the :ref:`UART Component <uart>` if you want
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to use multiple UART buses.
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See Also
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--------
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- :ref:`sensor-filters`
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- :doc:`cse7761`
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- :doc:`bl0940`
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- :apiref:`bl0939/bl0939.h`
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- :ghedit:`Edit`
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@ -252,6 +252,7 @@ Electricity
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ADE7953, components/sensor/ade7953, ade7953.svg, Power
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ADE7953, components/sensor/ade7953, ade7953.svg, Power
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ATM90E32, components/sensor/atm90e32, atm90e32.jpg, Voltage & Current & Power
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ATM90E32, components/sensor/atm90e32, atm90e32.jpg, Voltage & Current & Power
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BL0939, components/sensor/bl0939, bl0939.png, Voltage & Current & Power & Energy
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BL0940, components/sensor/bl0940, bl0940.png, Voltage & Current & Power
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BL0940, components/sensor/bl0940, bl0940.png, Voltage & Current & Power
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CS5460A, components/sensor/cs5460a, cs5460a.png, Voltage & Current & Power
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CS5460A, components/sensor/cs5460a, cs5460a.png, Voltage & Current & Power
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CSE7761, components/sensor/cse7761, cse7761.svg, Voltage & Current & Power
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CSE7761, components/sensor/cse7761, cse7761.svg, Voltage & Current & Power
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