CO2 Sensor MH-Z19 implementation

[JohnnyB1989]

Hi all,

I have some problems with the MH-Z19 Sensor, or better how to get it to work in TerrariumPI.

I can read it via ssh, but what do I have to type in for the sensor address?

Thanks in advance.

[theyosh]

It should be something like /dev/ttyS0 https://theyosh.github.io/TerrariumPI/hardware/sensor/mh-z19-co2-sensor/

[JohnnyB1989]

Hey Yosh,

already tried it, would not think about asking before reading the instructions :-)

I just get the response, the sensor could not be added.

[JohnnyB1989]

Okay... sorry to bother you, although it said its not possible to add the sensor, after two reboots, two CO2 sensors showed up :-)

[theyosh]

Did you try to add the sensors directly after a new install? Because after a first install a reboot is required. This CO2 sensor will not work if the Pi is not rebooted once after a new install.

[JohnnyB1989]

Could be :) but I´m not sure if I rebooted or not. Now its working, so thanks :-)