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add select mode funtion for bl0939 #4711

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add select mode funtion for bl0939
ackPeng Feb 25, 2025
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Merge branch 'esphome:current' into test
ackPeng Mar 3, 2025
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Merge branch 'esphome:current' into test
ackPeng Mar 17, 2025
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Merge branch 'esphome:current' into test
ackPeng Mar 24, 2025
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ackPeng Mar 26, 2025
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jesserockz May 28, 2025
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5 changes: 3 additions & 2 deletions components/sensor/bl0939.rst
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Expand Up @@ -7,7 +7,7 @@ BL0939 Power Sensor
:keywords: bl0939, Sonoff Dual R3 v2

The ``bl0939`` sensor platform allows you to use your BL0939 voltage/current/power and energy
sensors with ESPHome. This sensor is commonly found in Sonoff Dual R3 v2.
sensors with ESPHome. This sensor has two modes, one is direct connection measurement mode, the other is current transformer measurement mode. This sensor is commonly found in Sonoff Dual R3 v2(direct measurement mode) and Seeed XIAO Power Monitor(Current transformer measurement mode).

.. note::

Expand All @@ -22,6 +22,7 @@ Additionally, you need to set the baud rate to 4800, parity to ``NONE`` and stop
# Example configuration entry
sensor:
- platform: bl0939
mode: 'current_transformer_mode'
voltage:
name: 'BL0939 Voltage'
current_1:
Expand All @@ -45,7 +46,7 @@ Additionally, you need to set the baud rate to 4800, parity to ``NONE`` and stop

Configuration variables:
------------------------

- **mode** (*Optional*): Select the working mode,divided into ``direct_measurement_mode`` and ``current_transformer_mode``. If this item is not filled in, the default is direct measurement mode.
- **voltage** (*Optional*): Use the voltage value of the sensor in V (RMS).
All options from :ref:`Sensor <config-sensor>`.
- **current_1** (*Optional*): Use the current value of the channel 1 in amperes. All options from
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