💬 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.