I used this technique to send data from the cell-phone to an ESP32 using the pho...

		floitsch on June 20, 2024 \| parent \| context \| favorite \| on: Two ways to use an LED as a light sensor with Ardu... I used this technique to send data from the cell-phone to an ESP32 using the phone's flashlight: https://www.reddit.com/r/esp32/comments/wfea4r/send_data_wit...