The ESP32-DevKitC-1 development board is one of Espressif's official boards. This board is based on the ESP32-WROVER-E module, with the ESP32 as the core.
- Wi-Fi 802.11 b/g/n (802.11n up to 150 Mbps)
- Bluetooth v4.2 BR/EDR and BLE specification
- Built around ESP32 series of SoCs
- Integrated 4 MB SPI flash
- Integrated 8 MB PSRAM
- Peripherals
- SD card
- UART
- SPI
- SDIO
- I2C
- LED PWM
- Motor PWM
- I2S
- IR
- Pulse Counter
- GPIO
- Capacitive Touch Sensor
- ADC
- DAC
- Two-Wire Automotive Interface (TWAI®, compatible with ISO11898-1)
- Onboard PCB antenna or external antenna connector
Note
Not all of the chip pins are exposed to the pin headers.
| No. | Name | Type | Function |
|---|---|---|---|
| 1 | 3V3 | P | 3.3 V power supply |
| 2 | EN | I | CHIP_PU, Reset |
| 3 | IO36 | I | GPIO36, ADC1_CH0, S_VP |
| 4 | IO39 | I | GPIO39, ADC1_CH3, S_VN |
| 5 | IO34 | I | GPIO34, ADC1_CH6, VDET_1 |
| 6 | IO35 | I | GPIO35, ADC1_CH7, VDET_2 |
| 7 | IO32 | I/O | GPIO32, ADC1_CH4, TOUCH_CH9, XTAL_32K_P |
| 8 | IO33 | I/O | GPIO33, ADC1_CH5, TOUCH_CH8, XTAL_32K_N |
| 9 | IO25 | I/O | GPIO25, ADC1_CH8, DAC_1 |
| 10 | IO26 | I/O | GPIO26, ADC2_CH9, DAC_2 |
| 11 | IO27 | I/O | GPIO27, ADC2_CH7, TOUCH_CH7 |
| 12 | IO14 | I/O | GPIO14, ADC2_CH6, TOUCH_CH6, MTMS |
| 13 | IO12 | I/O | GPIO12, ADC2_CH5, TOUCH_CH5, MTDI |
| 14 | GND | G | Ground |
| 15 | IO13 | I/O | GPIO13, ADC2_CH4, TOUCH_CH4, MTCK |
| 16 | IO9 | I/O | GPIO9, D2 |
| 17 | IO10 | I/O | GPIO10, D3 |
| 18 | IO11 | I/O | GPIO11, CMD |
| 19 | 5V0 | P | 5 V power supply |
| No. | Name | Type | Function |
|---|---|---|---|
| 1 | GND | G | Ground |
| 2 | IO23 | I/O | GPIO23 |
| 3 | IO22 | I/O | GPIO22 |
| 4 | IO1 | I/O | GPIO1, U0TXD |
| 5 | IO3 | I/O | GPIO3, U0RXD |
| 6 | IO21 | I/O | GPIO21 |
| 7 | GND | G | Ground |
| 8 | IO19 | I/O | GPIO19 |
| 9 | IO18 | I/O | GPIO18 |
| 10 | IO5 | I/O | GPIO5 |
| 11 | IO17 | I/O | GPIO17 |
| 12 | IO16 | I/O | GPIO16 |
| 13 | IO4 | I/O | GPIO4, ADC2_CH0, TOUCH_CH0 |
| 14 | IO0 | I/O | GPIO0, ADC2_CH1, TOUCH_CH1, Boot |
| 16 | IO2 | I/O | GPIO2, ADC2_CH2, TOUCH_CH2 |
| 17 | IO15 | I/O | GPIO15, ADC2_CH3, TOUCH_CH3, MTDO |
| 17 | IO8 | I/O | GPIO8, D1 |
| 18 | IO7 | I/O | GPIO7, D0 |
| 19 | IO6 | I/O | GPIO6, SCK |
P: Power supply; I: Input; O: Output; T: High impedance.
Some of the GPIO's have important features during the booting process. Here is the list of the strapping pins on the ESP32.
| GPIO | Default | Function | Pull-up | Pull-down |
|---|---|---|---|---|
| IO12 | Pull-down | Voltage of Internal LDO (VDD_SDIO) | 1V8 | 3V3 |
| IO0 | Pull-up | Booting Mode | SPI Boot | Download Boot |
| IO2 | Pull-down | Booting Mode | Don't Care | Download Boot |
| IO15 | Pull-up | Enabling/Disabling Log Print During Booting and Timing of SDIO Slave | U0TXD Active | U0TXD Silent |
| IO5 | Pull-up | Timing of SDIO Slave | See ESP32 | See ESP32 |
Be aware when choosing which pins to use.
Some of the GPIO's are used for the external flash and PSRAM. These GPIO's cannot be used:
| GPIO | Shared Function |
|---|---|
| IO6 | External SPI Flash |
| IO7 | External SPI Flash |
| IO8 | External SPI Flash |
| IO9 | External SPI Flash |
| IO10 | External SPI Flash |
| IO11 | External SPI Flash |
Other GPIO's are INPUT ONLY and cannot be used as output pin:
| GPIO | Function |
|---|---|
| IO34 | GPIO34, ADC1_CH6, VDET_1 |
| IO35 | GPIO35, ADC1_CH7, VDET_2 |
| IO36 | GPIO36, ADC1_CH0, S_VP |
| IO39 | GPIO39, ADC1_CH3, S_VN |
- ESP32 (Datasheet)
- ESP32-WROVER-E (Datasheet)
- ESP32-DevKitC (Schematic)