MH-Z19B sensor sporadically working: Bad checksum error

Hello, i have a error in the daemon log that shows like that:

2022-11-26 22:51:34,255 - INFO - mycodo.controllers.controller_input_c5bc31a8 - Activated in 261.2 ms
2022-11-26 22:51:34,311 - ERROR - mycodo.inputs.mh_z19b_c5bc31a8 - Bad checksum

After that is showing good the value but after some minutes became None again and again.
I create a Trigger function to activate and desactivate every 5 minutes for fix for the moment.
Anyone know where can be the problem?


Sounds like a connection issue. Make sure all wires are short and securely connected.