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

0_1623533101105_Mesures5.png