Units CO2/TVOC

pierre.halleux

Hi,
I'm trying the Units CO2/TVOC M5Stack Sick C.

I'm just copy/pasting the code from the demo https://docs.m5stack.com/#/en/unit/tvoc
And
eCO2 stays blocked = 400ppm
TVOC stay bloced at 0
H2 moving a bit around 13580

Any idea ?
Does not seems to work fine.... I have another device Neatmo measuring CO2. It says it's not 400 but almost 1300ppm

COuld you help?
thanks,

mauwii

You need to find the right calibration (baseline) values for your unit, so only initialize it, but do not define a baseline, then you will see a difference. Also it should be clean air in the room, f.e. not smoking with closed windows for days.

for debugging purpose output the current baseline values as well, I think you will see a big difference to the ones in the sample then.

Serge

hi,
don't know why but if you set that line n°31 in comment, it seems to work

"# tvoc0.set_iaq_baseline(35187, 35502)
while True:

you may try to use the sample loop that you find in UIflow_Unit TVOC.

As you can see on the picture below, TOVC/eCO2 can be use in a classroom context and it works fine
I initialized it outside the window and came inside after