MHZ19-C CO2 Sensor Value disappears after one measurement (Live Measurement/Dashboard)

[metapunk85]

raspberrypi - 8.15.6

Please list specific setup details that are involved and the steps to reproduce the behavior:

raspberry pi3 B; Mycodo 8.15.6, Winsen MHZ19-C

1. setup input, select MHZ19B
2. the settings wheel and configure input
3. in Live Measurement delivering no ppm value
4. when the name (in input configuration) is changed and saved in the correct order, mycodo is displaying the sensor value correct for one data point. Then the setup breaks again

Expected behavior

The software should display the sensor value constantly. It used to work out fine for some days. Sensor values can be fetched with terminal

Screenshots

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Additional context

[metapunk85]

no bug, user problem. :) if serial console is ON in the raspi config, the serial port is used by the sensor and the console, which leads to a conflict.