RedPill ESP32-S3 – Pinout

Note: Use the UART port for default programming.

USB connector uses the GPIO19 (DN) and GPIO20 (DP) and has the 5k1 pulldown resistors in place.

The UART connector goes directly to the CP2102N USB-to-UART bridge. It also has 5k1 pulldown resistors in place.
The USB-to-UART bridge is connected to the ESP32-S3 UART pins 36 (RX) and 37 (TX).

Please check the module datasheet for pinout details.