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Board overview
ESP32-DevKitC V4
Espressif · ESP32
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Showing 38 of 38 pins
Simplified technical illustration. Pin data is source-backed; verify against the linked documentation before wiring.
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Mapped source · ESP32-DevKitC V4 user guideOfficial- Official Espressif header numbering for ESP32-DevKitC V4; J2 and J3 each use positions 1 through 19.
- D0, D1, D2, D3, CMD, and CLK connect to module flash and are not recommended for general use.
- GPIO16 and GPIO17 are available on ESP32-WROOM/SOLO modules but reserved on ESP32-WROVER modules.
All 38 pins
| # | Signal | Role | Net | Also / notes |
|---|---|---|---|---|
| 1 | Power | 3V3 | ||
| 2 | System | |||
| 3 | ADC | GPIO36 / ADC1_CH0 · Input only | ||
| 4 | ADC | GPIO39 / ADC1_CH3 · Input only | ||
| 5 | ADC | GPIO34 / ADC1_CH6 · Input only | ||
| 6 | ADC | GPIO35 / ADC1_CH7 · Input only | ||
| 7 | ADC | GPIO32 / ADC1_CH4 / Touch9 | ||
| 8 | ADC | GPIO33 / ADC1_CH5 / Touch8 | ||
| 9 | DAC | GPIO25 / ADC2_CH8 / DAC1 | ||
| 10 | DAC | GPIO26 / ADC2_CH9 / DAC2 | ||
| 11 | GPIO | GPIO27 / ADC2_CH7 / Touch7 | ||
| 12 | Debug | JTAG | GPIO14 / ADC2_CH6 / Touch6 / MTMS | |
| 13 | System | GPIO12 / ADC2_CH5 / Touch5 / MTDI · Boot strap | ||
| 14 | Ground | GND | ||
| 15 | Debug | JTAG | GPIO13 / ADC2_CH4 / Touch4 / MTCK | |
| 16 | Reserved | GPIO9 / Flash HD · Connected to module flash | ||
| 17 | Reserved | GPIO10 / Flash WP · Connected to module flash | ||
| 18 | Reserved | GPIO11 / Flash CMD · Connected to module flash | ||
| 19 | Power | 5V | ||
| 1 | Ground | GND | ||
| 2 | SPI | SPI | GPIO23 | |
| 3 | I2C | I2C | GPIO22 | |
| 4 | UART | UART | GPIO1 / U0TXD | |
| 5 | UART | UART | GPIO3 / U0RXD | |
| 6 | I2C | I2C | GPIO21 | |
| 7 | Ground | GND | ||
| 8 | SPI | SPI | GPIO19 | |
| 9 | SPI | SPI | GPIO18 | |
| 10 | System | GPIO5 · Boot strap | ||
| 11 | UART | UART | GPIO17 · Reserved on ESP32-WROVER modules | |
| 12 | UART | UART | GPIO16 · Reserved on ESP32-WROVER modules | |
| 13 | GPIO | GPIO4 / ADC2_CH0 / Touch0 | ||
| 14 | System | GPIO0 / ADC2_CH1 / Touch1 / BOOT · Boot strap | ||
| 15 | System | GPIO2 / ADC2_CH2 / Touch2 · Boot strap | ||
| 16 | System | GPIO15 / ADC2_CH3 / Touch3 / MTDO · Boot strap | ||
| 17 | Reserved | GPIO8 / Flash SD1 · Connected to module flash | ||
| 18 | Reserved | GPIO7 / Flash SD0 · Connected to module flash | ||
| 19 | Reserved | GPIO6 / Flash CLK · Connected to module flash |