Energy (AC) - CSE7766¶
This plugin is specifically made for Sonoff devices Sonoff S31, Sonoff Pow R2 and Sonoff POW/Dual R3 models.
Type: Energy (AC)
Used libraries: ESPEasySerial
This device is intended to be connected to mains power (110V/220V). Safety is of utmost importance, so the unit should not be connected to a computer if it also connected to the mains power, and it should be sufficiently isolated to prevent touching parts that can be connected to mains power!
Sonoff S31, Sonoff Pow R2, Sonoff POW R3xx(D), Sonoff Dual R3
To measure the power used by an electric device, the Sonoff POW units, running either on an ESP8266 or ESP32, can be used. The installed power-sensor is the CSE7766, that makes the measured data available via a serial output at 4800 baud.
This plugin can read the measured data, and apply a correction value to show calibrated values for Voltage, Power and Current, and it will also make available a pulse count.
Name A unique name should be entered here.
Enabled The device can be disabled or enabled. When not enabled the device should not use any resources.
U Ref: The calibration value for the Voltage measurement. When set to 0, a default value of
1950will be used, see Calibration, below.
I Ref: The calibration value for the Current measurement. When set to 0, a default value of
3500will be used, see Calibration, below.
P Ref: The calibration value for the Power measurement. When set to 0, a default value of
12530will be used, see Calibration, below.
Single event with all values, Send to Controller and Interval settings are standard available configuration items. Send to Controller only when one or more Controllers are configured.
Interval By default, Interval will be set to 0 sec. as this is optional for this plugin.
The measured values are available in
Pulses. A formula can be set to recalculate. The number of decimals is by default set to 2, and can be set to 0 for
Pulses, as no decimals are provided from the measurement. When enabling the Stats checkbox for a value, statistics will be gathered and a graph of the last 16 (ESP8266) or 64 (ESP32) measurements will be shown.
Easiest way to calibrate the plugin is to connect a known (resistive) load to the unit, measure the actual voltage, calculate the current from the power and voltage (
current = power/voltage) and use the
csecalibrate,<voltage>,<current>,<power> command (the Command input on the Tools page in the web UI will doen fine for that) to set the calibration values.
Will set the used calibration reference factors to some known current value.
For example, if the device using this sensor is plugged into mains power, it may report 200 Volt AC, while it actually is 229V.
So the value given to this command should then be
The last two parameters are optional, but their position determines what unit it represents.
If the setting for current has to be updated, at least 2 parameters must be given of which the first must then be set to
Will reset the calibration values to the default values, causing auto-calibration.
Changed in version 2.0: …
changed 2023-02-11 Use ESPEasySerial to allow more flexible Serial/GPIO configuration and support new Sonoff POW models (ESP32)
added Major overhaul for 2.0 release.
New in version 1.0: …
added Initial release version.