CO2-Monitor AIRCO2NTROL MINI 31.5006

[fireball]

Hi,
i´m very new in this forum and hopfully i´m in the correct corner
I read a lot of websites the last time and i didt come to a solution.

My wish is, is it possible to use an TFA Dostman CO2 Meter together with ESPEasy?
https://www.tfa-dostmann.de/produkt/co2 ... i-31-5006/

I have 3x ESPEasy´s in my network and i want to use this software more but i found only a solution in relation to ESPHome.

Here some information i could collect:
https://www.hackerspace-bamberg.de/Co2_Monitor
This guys decoded the data and there some examples,

Maybe here are more infos?!
https://hackaday.io/project/5301-revers ... co-monitor
This guy decoded it too and then you can see many project based on this in the comments.

I used currently the Co2 Sensor via USB on my rasperrypi and can read this data into FHEM. But i want to use the CO2Meter anywhere in the house.

Some other links:
https://www.co2meter.com/products/co2mi ... ty-monitor
https://github.com/schinken/esp8266-co2monitor
https://github.com/schinken/esp8266-co2 ... onitor.ino

Greets
René

[TD-er]

Had to do quite a lot of clicks to finally get some idea of the price range of it.
At 85+ euro it is for sure not something I will order myself to be able to test it.

It does seem to use a very simple decoding function:

Triggered on the clock pin:
https://github.com/schinken/esp8266-co2 ... #L112-L132

Apparently if there has been no clock for 50 msec, then whatever comes in will be a new 'packet'.

When 5 bytes are received, the packet is decoded:
https://github.com/schinken/esp8266-co2 ... #L299-L326

Software-wise it is really not that hard.
However, some parts of this code have to be altered as there are some issues with it. For example the interrupt function does way too much (even calling no IRAM functions), so it cannot be copy/paste into some ESPEasy plugin.


Another thing I wonder about these sensors is what hardware they are using.
There is some mentioning of an NDIR sensor, but no idea which one.

[fireball]

Hi,

the product is sold under different labels, here i found more details:
https://www.co2meter.com/collections/ga ... ty-monitor

Also the ESPHome Guys have more infos about the sensors form ZyAura:
https://esphome.io/components/sensor/zyaura.html

Here one Link to ZyAura:
https://www.zyaura.com/product-detail/zgm053u/

The only thing i know from the FHEM Forum, there are some of this CO2Meters which use an encryption and new once you dont need to encrypt the data.
I have one with encryption and i used it via USB on Raspberry PI, but i want to use it independed from the RPI.
Maybe i get a second used one, only for 25€. So its maybe possible to send it to you for the development and after you send it back?!

The other way im thinking about is, to use ESPHome with MQTT, it should be possbile too... But i need to check.

VG
René

[TD-er]

I do live in the Netherlands. No idea how much the shipping costs will be to/from you?