You cannot send Null, None or 'Invalid' to domoticz. Just dont send it.... Wait until the next valid value is received, not being Null or None. Thanks for the answer. However, now I'm even more confused. Judging on the code Sebastiaan Ebeltjes does seem to know how this should work. I find the next ...

Too bad to hear that upgrading Raspbian will break everything again... I finally sort of managed to fix the problems I had with reading the value's from my modbus devices. I added a wait period depending on the modbus address so the scripts don't try to access the devices at the same time. Not sure ...

i have an problem it is not working 2022-11-13 10:42:20.650 Error: Epever Batt Volt: (ModbusREAD) failed to load 'plugin.py', Python Path used was '/home/pi/domoticz/plugins/modbus-read/:/usr/lib/python39.zip:/usr/lib/python3.9:/usr/lib/python3.9/lib-dynload:/usr/local/lib/python3.9/dist-packages ...

Adding on the conversation, it is quite 'easy' to control a Brink HRV with OpenTherm. I used a board from Tindie as a control board. https://www.tindie.com/products/jiripraus/opentherm-gateway-arduino-shield/ I've done a full write up on how to control (and read the sensors) for a Brink HRV myself ...

Ps. There will be 2 universal plugins, one to READ and one to WRITE :D modbus domoticz universal write 01.png modbus domoticz universal write 02.png I never managed to get the WRITE function to work. I got some INT error. But now I see in this picture that the payload ON and payload OFF are (HEX ...

Just for some extra information: C3 is speed preset 1 C4 is speed preset 2 C5 is speed preset 3 C6 is dirty filter alarm indication. C3 can be skipped becaurse the unit goes to speed preset 1 by default when C4 or C5 are not connected. C6 is a +24Vdc too C2 when the filter is dirty. I used a solid ...

... My problem seem to be different. I tried restart, but got lots of errors. So what I did I set different polling rates for different parameters, prime numbers from 11 to 43 seconds. I suspect PLC (Siemens LOGO!) doesn't handle well several modbus request at same time. Mostly works. I only get ...

Just for some extra information: C3 is speed preset 1 C4 is speed preset 2 C5 is speed preset 3 C6 is dirty filter alarm indication. C3 can be skipped becaurse the unit goes to speed preset 1 by default when C4 or C5 are not connected. C6 is a +24Vdc too C2 when the filter is dirty. I used a solid ...