[werk_ag]

If I can fully trust the description, it should be the first version, not B.

Thank you,
It seems equal to mine, version B is slightly different.

[tobyportugal]

Hello

I think (with my bad English) have there an early response.
[/url]
https://github.com/letscontrolit/ESPEasy/issues/466

https://github.com/letscontrolit/ESPEasy/pull/472

[url=https://github.com/letscontrolit/ESPEasy/pull/472]

[werk_ag]

Hi Tobby, good morning

As most as I know, the ABC function referred on those discussions, its only available on the MH-Z19B models, however that's exactly the reason why I'm trying to know if someone is using a model B.
Since some time that I'm waiting for a model B, as soon as it arrives I will start to compare the readings from both.

[tobyportugal]

Since some time that I'm waiting for a model B, as soon as it arrives I will start to compare the readings from both.

Normally I should receive, in October, 2 version B (1 for me, 1 for Paulo).
If you want, I can lend you one.

Have a nice week end.

[JT118]

Looking at the spec sheets; (which I am sure all have read, just included here for sake of completeness)

http://www.winsen-sensor.com/d/files/PDF...Ver1.0.pdf

http://www.winsen-sensor.com/d/files/inf...ver1_0.pdf

the modules seem to be able to measure from 0-2000ppm (a minimum of 0ppm) rather than a minimum of 400ppm. 400ppm being the point at which they are calibrated. (if a "B" model then self calibrates every 24 hours, Automatic Baseline Correction ) and 327199; https://thingspeak.com/channels/327199 regularly reads below 400ppm most days. It seems as if 327199 has the most realistic diurnal range of 390ppm to 490ppm. Why is this so different to the rest of us is worth asking. Hornychz??

Both sensors seem to be able to measure a bigger range of 0-5000ppm, quite how this is decided I am not sure; but I am sure Werk has built this decision into the code if that is the way the range decision is made.

[zitoune]

Hello all,

i also created my channel - somehow I cannot see the CO2 values, though they appear on my RX. Would it be because the value is very low (about 10)?

Thanks!
Zitoune

[JT118]

My CO2 graph took some time to appear, 12 hours if I remember correctly. your levels are very low, In Singapore I think you should expect mid 400's ppm and possibly a lot more unless they are putting in more oil palm in Indonesia. It is, I think, your "dry" season so any burning will be happening about now. Your PM2.5 and PM10 will be very interesting.

[JT118]

My MH-Z19.

   

this was the picture used by my seller on ebay;

   

Not sure if one is an "B" model or not.

[JT118]

   
AQI monitor as currently working:

[werk_ag]

Both sensors seem to be able to measure a bigger range of 0-5000ppm, quite how this is decided I am not sure; but I am sure Werk has built this decision into the code if that is the way the range decision is made.

Currently the code doesn't do any change to the default measure range of the sensor, so each sensor is at its default values, which I think its 0-5000ppm.

Some time ago, I did some tests trying changing the measure range of my MH-Z19, to 0-2000, but I never reached any conclusion, as the measured values  apparently haven't changed.  Honestly I haven't had enough time to return to my researches with the MH-Z19. So, this is an open field for investigation...