I'm currently building a hygrometer (according to tutorials like this https://www.sweetpi.de/blog/436/luftfeuchtigkeit-und-temperatur-mit-dem-raspberry-pi-messen)
All tutorials are using the "normal" Pi. I use the RasPi Zero W. After 1,5 days trouble with this setup on Raspi zero, I tried the same on an old Raspi (the first Model-B which was released I think) and it works!
Now I'm searching for any differences between the Pi's? Hope one of you haves an idea.