Domoticz Community Forum - Support & Discussion

Does anyone know how to connect a water pressure sensor (in the heating system) to Domoticz?
There is an i2c sensor xdb401. (There is a datasheet from the manufacturer for it).
As a last resort - an analog one with an output of 0-5 volts, for example.

Check the https://esphome.io/ project where you can connect sensors to all kind of cheap wifi microcontrollers and have the data sent to Domoticz over MQTT Autodiscover protocol
https://esphome.io/components/mqtt.html ... t-entities
Domoticz MQTT Autodiscover:
https://wiki.domoticz.com/MQTT#Add_hard ... Gateway%22

Answered you in 4pda

Got one working. Any questions - welcome

If the xdb401 is I2C, you’ll need a microcontroller such as an ESP8266 or ESP32 to read it and forward the data to Domoticz, with ESPHome and MQTT autodiscovery being a straightforward approach; if you opt for a 0–5V analog sensor instead, ensure the ADC supports that range or use a voltage divider since most ESP boards are limited to 3.3V input (it’s also helpful to review general heating system configurations and pressure requirements https://www.mesa-plumbing.com/heating/ to ensure the sensor’s range and output are appropriate), and in both cases Domoticz will ultimately receive the measurements via MQTT.

I used a Dombus12 module to do this from my well (pressure transducer).