Sonoff PSF-B01 - Pin definition

3.3Pin definition
Pin definition and function description
Pin
Name
Features
1
ANT
Wi-Fi Antenna Note: PSF-B01 cannot be used
2
ADC
ADC interface, input range: 0-1V
3
EN
Chip enable terminal high level: valid; low level: closed. Note: An
external pull-up resistor of 1~10K, connect a 100nF capacitor to the
ground.