Best ESP32 INPUT pins AND Best ESP32 OUTPUT pins

MH-ET LIVE D1 minikit ESP32
ESP32 PINOUT
GPIO Input Output Notes
0 pulled up OK outputs PWM signal at boot
1 TX pin OK debug output at boot
2 OK OK connected to on-board LED
3 OK RX pin HIGH at boot
4 OK OK  
5 OK OK outputs PWM signal at boot
6 x x connected to the integrated SPI flash
7 x x connected to the integrated SPI flash
8 x x connected to the integrated SPI flash
9 x x connected to the integrated SPI flash
10 x x connected to the integrated SPI flash
11 x x connected to the integrated SPI flash
12 OK OK boot fail if pulled high
13 OK OK  
14 OK OK outputs PWM signal at boot
15 OK OK outputs PWM signal at boot
16 OK OK  
17 OK OK  
18 OK OK  
19 OK OK  
21 OK OK  
22 OK OK  
23 OK OK  
25 OK OK  
26 OK OK  
27 OK OK  
32 OK OK  
33 OK OK  
34 OK   input only
35 OK   input only
36 OK   input only
39 OK   input only

ESP32 SPI FLASH PINS

  • GPIO 6 (SCK/CLK)
  • GPIO 7 (SDO/SD0)
  • GPIO 8 (SDI/SD1)
  • GPIO 9 (SHD/SD2)
  • GPIO 10 (SWP/SD3)
  • GPIO 11 (CSC/CMD)

ESP32 CAPACITIVE TOUCH GPIOS

  • T0 (GPIO 4)
  • T1 (GPIO 0)
  • T2 (GPIO 2)
  • T3 (GPIO 15)
  • T4 (GPIO 13)
  • T5 (GPIO 12)
  • T6 (GPIO 14)
  • T7 (GPIO 27)
  • T8 (GPIO 33)
  • T9 (GPIO 32)

ESP32 ADC PINS (18x12bits ADC)

  • ADC1_CH0 (GPIO 36)
  • ADC1_CH1 (GPIO 37)
  • ADC1_CH2 (GPIO 38)
  • ADC1_CH3 (GPIO 39)
  • ADC1_CH4 (GPIO 32)
  • ADC1_CH5 (GPIO 33)
  • ADC1_CH6 (GPIO 34)
  • ADC1_CH7 (GPIO 35)
  • ADC2_CH0 (GPIO 4)
  • ADC2_CH1 (GPIO 0)
  • ADC2_CH2 (GPIO 2)
  • ADC2_CH3 (GPIO 15)
  • ADC2_CH4 (GPIO 13)
  • ADC2_CH5 (GPIO 12)
  • ADC2_CH6 (GPIO 14)
  • ADC2_CH7 (GPIO 27)
  • ADC2_CH8 (GPIO 25)
  • ADC2_CH9 (GPIO 26)

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