diff --git a/components/sensor/cse7761.rst b/components/sensor/cse7761.rst
new file mode 100644
index 000000000..999047aa8
--- /dev/null
+++ b/components/sensor/cse7761.rst
@@ -0,0 +1,74 @@
+CSE7761 Power Sensor
+====================
+
+.. seo::
+    :description: Instructions for setting up CSE7761 power sensors for the Sonoff Dual R3 v1.x
+    :image: cse7761.png
+    :keywords: cse7761, Sonoff Dual R3
+
+The ``cse7761`` sensor platform allows you to use your CSE7761 voltage/current and power sensors
+with ESPHome. This sensor is commonly found in Sonoff Dual R3 v1.x.
+
+.. note::
+
+    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.
+
+As the communication with the CSE7761 done using UART, you need
+to have an :ref:`UART bus <uart>` in your configuration with the ``tx_pin`` and ``rx_pin`` connected to the CSE7761.
+Additionally, you need to set the baud rate to 38400 and parity to ``EVEN``.
+
+.. code-block:: yaml
+
+    # Example configuration entry
+    # Disable logging over serial
+    logger:
+      baud_rate: 0
+
+    uart:
+      tx_pin: GPIO25
+      rx_pin: GPIO26
+      baud_rate: 38400
+      parity: EVEN
+
+    sensor:
+      - platform: cse7761
+        voltage:
+          name: 'CSE7761 Voltage'
+        current_1:
+          name: 'CSE7761 Current 1'
+        current_2:
+          name: 'CSE7761 Current 2'
+        active_power_1:
+          name: 'CSE7761 Active Power 1'
+        active_power_2:
+          name: 'CSE7761 Active Power 2'
+        update_interval: 5s
+
+.. note::
+
+    The configuration above should work for Sonoff Dual R3 v1.x.
+
+Configuration variables:
+------------------------
+
+- **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
+  :ref:`Sensor <config-sensor>`.
+- **current_2** (*Optional*): Use the current value of the channel 2 in amperes. All options from
+  :ref:`Sensor <config-sensor>`.
+- **active_power_1** (*Optional*): Use the (active) power value of the channel 1 in watts. All options from
+  :ref:`Sensor <config-sensor>`.
+- **active_power_2** (*Optional*): Use the (active) power value of the channel 2 in watts. All options from
+  :ref:`Sensor <config-sensor>`.
+- **update_interval** (*Optional*, :ref:`config-time`): The interval to check the
+  sensor. Defaults to ``60s``.
+- **uart_id** (*Optional*, :ref:`config-id`): Manually specify the ID of the :ref:`UART Component <uart>` if you want
+  to use multiple UART buses.
+
+See Also
+--------
+
+- :ref:`sensor-filters`
+- :apiref:`cse7761/cse7761.h`
+- :ghedit:`Edit`
diff --git a/devices/sonoff.rst b/devices/sonoff.rst
index 0c4004c49..9bb2eca46 100644
--- a/devices/sonoff.rst
+++ b/devices/sonoff.rst
@@ -102,6 +102,22 @@ Sonoff Dual R2 v1.4
     GPIO10, Button on the case,
     GPIO13, Blue LED (inverted)
 
+Sonoff Dual R3 v1.x
+-------------------
+
+.. pintable::
+
+    GPIO27, Relay #1,
+    GPIO14, Relay #2,
+    GPIO0, Button,
+    GPIO13, Blue LED (inverted),
+    GPIO32, SW Input #1 (inverted),
+    GPIO33, SW Input #2 (inverted),
+    GPIO25, UART TX pin (for power sensor)
+    GPIO26, UART RX pin (for power sensor)
+
+See :doc:`/components/sensor/cse7761` for measuring power.
+
 Sonoff Pow R1
 -------------
 
diff --git a/images/cse7761.svg b/images/cse7761.svg
new file mode 100644
index 000000000..697d4d0fb
--- /dev/null
+++ b/images/cse7761.svg
@@ -0,0 +1,49 @@
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diff --git a/index.rst b/index.rst
index 330bff03b..73e8f2908 100644
--- a/index.rst
+++ b/index.rst
@@ -238,6 +238,7 @@ Electricity
     ADE7953, components/sensor/ade7953, ade7953.svg, Power
     ATM90E32, components/sensor/atm90e32, atm90e32.jpg, Voltage & Current & Power
     CS5460A, components/sensor/cs5460a, cs5460a.png, Voltage & Current & Power
+    CSE7761, components/sensor/cse7761, cse7761.svg, Voltage & Current & Power
     CSE7766, components/sensor/cse7766, cse7766.svg, Voltage & Current & Power
     CT Clamp, components/sensor/ct_clamp, ct_clamp.jpg, AC current
     Daly BMS, components/sensor/daly_bms, daly_bms.png, Voltage & Current & Power
diff --git a/svg2png/cse7761.png b/svg2png/cse7761.png
new file mode 100644
index 000000000..60190d126
Binary files /dev/null and b/svg2png/cse7761.png differ