HI,
I'll try your serial interface code later.
It seems to be an accurate sensor, however - the values are a bit "bouncy". I'll incorporate a "running average" on the measurements - to calm it down.
I am always tempted to add more sensors to the nodes, but in this case it is not possible.
My casing design would not even allow for one additional resistor...

HI,
I'll try your serial interface code later.
It seems to be an accurate sensor, however - the values are a bit "bouncy". I'll incorporate a "running average" on the measurements - to calm it down.
I am always tempted to add more sensors to the nodes, but in this case it is not possible.
My casing design would not even allow for one additional resistor...

@alowhum. Yes it does. I've built a combined Co2, humidity and temp sensor using mh-z19 and dht22. it shows current values on an oled and reports back to openhab. will use a number of these for ventilation control.If anyone is interested I'll post the complete build when done (currently waiting for more components from China).