ESP8266 Community Forum

- Fri Aug 19, 2022 6:22 am #95104 I recently wired up the ESP8266 wifi module and DHT22 to my arduino uno to do some humidity / temperature measurement and reading on a webpage with portforwarding. However I couldn't get the ESP working, because as soon as I connect the CH-PD (chip enable) pin over a pull-up to 3.3v the red led on the ESP turns off (power). I measured the supply voltage and it drops to 1v after connecting the CH-PD pin. I use a voltage divider for my supply voltage of 3.3v from 5v.

I'd be very happy, if anyone could help me with this. Thanks

- Tue Aug 23, 2022 2:45 am #95135 Don't use a voltage divider to power a esp8266, it's silly. An esp8266 can draw up to 500 mA. Use a regulator.