ESP32-S3 Pin Definitions

    
        GPIO#
        Funtion
        Mode
      
        0
        Boot0
         
        1
        Stepper Driver 2 RST
        Output
      
        2
        Stepper Driver 2 STEP
        Output
      
        3
        LCD Backlight
        Output
      
        4
        Rotary Encoder SW
        Input (Active Low)
      
        5
        SPI MISO / I2C SCL
         
        6
        SPI MOSI / I2C SDA
         
        7
        SPI CLK
         
        8
        Rotary Encoder A
        Input
      
        9
        ADC Current
        Analog Input
      
        10
        ADC VIN
        Analog Input
      
        11
        Buzzer
        Output (Active High)
      
        12
        Current Fault
        Input (Active Low)
      
        13
        ZVS High Current On/Off
        Output (Pulsed 100Hz+)
      
        14
        Unused
         
        15
        SPI CS
        Output
      
        16
        LCD A0
        Output
      
        17
        LCD RST
        Output
      
        18
        Rotary Encoder B
        Input
      
        19
        USB D-
        USB
      
        20
        USB D+
        USB
      
        21
        Cooling Pump Tach
        Input
      
        35
        Drop Solenoid
        Output (Active High)
      
        36
        Case Detector IR Out
        Output (Active High)
      
        37
        Case Detector Input
        Input (Active Low)
      
        38
        Stepper Driver 1 STEP
        Output
      
        39
        Stepper Driver 1 RST
        Output
      
        40
        DS18B20 One Wire
        Input/Output
      
        41
        Stepper Drivers FLT
        Input (Active Low)
      
        42
        Stepper Drivers DIR
        Output
      
        43
        Case Height Adjustment Home Switch
        Input (Active Low)
      
        44
        Start/Stop Button
        Input (Active Low)
      
        46
        ZVS Control (Low Current)
        Output (Active High)
      
        47
        Pump On/Off
        Output (Active High)
      
        48
        Fans On/Off
        Output (Active High)

GPIO#	Funtion	Mode
0	Boot0
1	Stepper Driver 2 RST	Output
2	Stepper Driver 2 STEP	Output
3	LCD Backlight	Output
4	Rotary Encoder SW	Input (Active Low)
5	SPI MISO / I2C SCL
6	SPI MOSI / I2C SDA
7	SPI CLK
8	Rotary Encoder A	Input
9	ADC Current	Analog Input
10	ADC VIN	Analog Input
11	Buzzer	Output (Active High)
12	Current Fault	Input (Active Low)
13	ZVS High Current On/Off	Output (Pulsed 100Hz+)
14	Unused
15	SPI CS	Output
16	LCD A0	Output
17	LCD RST	Output
18	Rotary Encoder B	Input
19	USB D-	USB
20	USB D+	USB
21	Cooling Pump Tach	Input
35	Drop Solenoid	Output (Active High)
36	Case Detector IR Out	Output (Active High)
37	Case Detector Input	Input (Active Low)
38	Stepper Driver 1 STEP	Output
39	Stepper Driver 1 RST	Output
40	DS18B20 One Wire	Input/Output
41	Stepper Drivers FLT	Input (Active Low)
42	Stepper Drivers DIR	Output
43	Case Height Adjustment Home Switch	Input (Active Low)
44	Start/Stop Button	Input (Active Low)
46	ZVS Control (Low Current)	Output (Active High)
47	Pump On/Off	Output (Active High)
48	Fans On/Off	Output (Active High)