💬 Air Humidity Sensor - Si7021
texnic last edited by
The link to the 3.3 V module on AliExpress actually leads to the 5 V module.
@texnic the seller must have changed the items. I will look into it. Thanks for the hint!
Mark Hansen last edited by
Vice-versa, the link to the 5V module leads to a 3V (well, 1.9V to 3.6V) sensor unit
Latest Mailing List Banned last edited by
This post is deleted!
@mark-hansen I checked all links (Ebay & Ali) and they all link to the correct modules.
The sensor might support 1.9-3.6V, but the modules are for 3.3 and 5.0V IO levels respectively. The blue modules have a component marked 662K at the bottom, which is a XC6206P332MR voltage regulator. The 6-pin component next to it is a level shifter so the module operates at 5V levels on the outside, and 3.3V to the SI7021.
So please, explain why you think the links are wrong.
kiesel last edited by
I had the problem that the code wouldn't return when calling sensor.getCelsiusHundredths() while using the linked library. It works with this library: