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The ESP module can read a SI7021/HTU21D temperature/Humidity sensor using the I2C protocol. (The HTU21D Sensor does have the same specification and communications protocol and even the same I2C address so it is drop-in replacements for the SI7021)


The sensor needs to be connected to a the I2C pins on the ESP module. These pins can be configured on the hardware tab.



Custom Sketch

ESP Easy

Use the device tab on the ESP Easy webinterface and create a new task by editing one of the available tasks. Select "Temp + Hum SI7021" from the dropdown box.


Enter the IDX found in the Domoticz device page. That should be all.

Optional settings

Use of formulas

Use of value names