@ckuehnel said in TTGO T-Higrow:

https://ckarduino.wordpress.com/2021/11/16/messung-von-umgebungsbedingungen-fur-pflanzen-mit-lilygottgo-t-higrow-sensor/

Hallo! Thanks for the detailed information in your review.

Did you notice any whine when running off battery?
I have a similar devkit (diy more) but there is a high-pitched whine from the esp32 module, even in deep sleep mode.
And the battery drains rather quickly (3 days or so, wake every 30m).

Is the Lilygo one silent?