Esp32-S3 Motherboard Pins Pin Use 0 Boot 1 Servo 15 2 Servo 14 3 Servo 13 4 Servo 12 5 Fuse 4 ADC 6 Fuse 1 ADC 7 Servo 0 8 Servo 1 9 Servo 2 10 Servo 3 11 Fuse 2 ADC 12 Servo 4 13 Servo 5 14 Servo 6 15 6V ADC 16 Batt Voltage ADC 17 Fuse 3 ADC 18 Fuse 5 ADC 19 USB - 20 USB + 21 Servo 7 26 AD Servo 1 33 AD Servo 3 34 AD Servo 4 35 Batt Serial TX 36 Heart Beat LED 37 Servo 8 38 Servo 9 39 Servo 10 40 Servo 11 41 SDA 42 SCL 43 TX 44 RX 45 46 47 AD Servo 2 48 Batt Serial RX I2C i2c (SCL 42, SDA 41) - BNO055 Serial Serial 0: Tx 43, Rx 44 Serial 1: Tx 35, Rx 48