mh-z19: Returns null - Need help

Hi there,

first of all thank you for your package. I have recently started playing around with a rpi 4 and wanted to connect a mh-z19b with your python package.

I made sure the serials are available:

serial0 -> ttyS0
serial1 -> ttyAMA0

Enabled i2c However i2c output is empty

And even made sure uart is enabled (as seen on another blog )

When I run sudo python -m mh_z19 I (most of the time) get back null

Sometimes, however there is also another message:

Here is my cabling set up.

I should mention, that the soldered pins at the mh-z19b where bent a bit due to delivery. But I don’t think (hope) this is a problem.

Do you have any ideas what else I could test to make it work?

Thanks in advance!