DFRobot FireBeetle ESP32-E - Page 6

Overview
FireBeetle ESP32-E has up to 22 physical GPIOs, of which the pins 34-39 are only used as input pins, and others can be used as both input and
output pins. All logic voltages are 3.3V.
Control: FireBeetle Enable/reset pin
Touch: pin with capacitive touch function
Analog: analog pin