Espressif ESP32-C6-DevKitC-1
Official ESP32-C6 dev board with Wi-Fi 6, Thread, and BLE - ideal for Matter, secure IoT, and embedded development.
Espressif ESP32-C6-DevKitC-1 Pinout
32 pins · 2.54 mm pitch
| Pin | GPIO | Labels | Status | Capabilities | Notes |
|---|---|---|---|---|---|
| 1 | - | 3V33.3V | power | - | J1 header. 3.3V regulated power output. |
| 2 | - | RSTEN | control | - | J1 header. Chip enable/reset - high enables the chip, low disables it. |
| 3 | 4 | IO4MTMS | strapping | adc | J1 header. GPIO4; ADC1 channel 4; JTAG MTMS; LP GPIO/UART RXD. |
| 4 | 5 | IO5MTDI | strapping | adc | J1 header. GPIO5; ADC1 channel 5; JTAG MTDI; LP GPIO/UART TXD. |
| 5 | 6 | IO6MTCK | strapping | adc | J1 header. GPIO6; ADC1 channel 6; JTAG MTCK; LP I2C SDA. |
| 6 | 7 | IO7MTDO | strapping | - | J1 header. GPIO7; JTAG MTDO; LP I2C SCL. |
| 7 | 0 | IO0 | safe | adc | J1 header. GPIO0; ADC1 channel 0; 32 kHz crystal input (XTAL_32K_P). |
| 8 | 1 | IO1 | safe | adc | J1 header. GPIO1; ADC1 channel 1; 32 kHz crystal input (XTAL_32K_N). |
| 9 | 8 | IO8 | strapping | - | J1 header. GPIO8; drives the onboard addressable RGB LED; strapping pin (boot mode). |
| 10 | 10 | IO10 | safe | - | J1 header. GPIO10. |
| 11 | 11 | IO11 | safe | - | J1 header. GPIO11. |
| 12 | 2 | IO2 | safe | adc | J1 header. GPIO2; ADC1 channel 2. |
| 13 | 3 | IO3 | safe | adc | J1 header. GPIO3; ADC1 channel 3. |
| 14 | - | 5V | power | - | J1 header. 5V input/output (USB VBUS). |
| 15 | - | GND | ground | - | J1 header. Ground. |
| 16 | - | NC | - | J1 header. Not connected. | |
| 17 | - | GND | ground | - | J3 header. Ground. |
| 18 | 16 | TXIO16U0TXD | uart | uart | J3 header. GPIO16; UART0 TX (default serial console). |
| 19 | 17 | RXIO17U0RXD | uart | uart | J3 header. GPIO17; UART0 RX (default serial console). |
| 20 | 15 | IO15 | strapping | - | J3 header. GPIO15; strapping pin (JTAG signal source select). |
| 21 | 23 | IO23SDIO_DATA3 | safe | - | J3 header. GPIO23; SDIO data 3. |
| 22 | 22 | IO22SDIO_DATA2 | safe | - | J3 header. GPIO22; SDIO data 2. |
| 23 | 21 | IO21SDIO_DATA1 | safe | - | J3 header. GPIO21; SDIO data 1. |
| 24 | 20 | IO20SDIO_DATA0 | safe | - | J3 header. GPIO20; SDIO data 0. |
| 25 | 19 | IO19SDIO_CLK | safe | - | J3 header. GPIO19; SDIO clock. |
| 26 | 18 | IO18SDIO_CMD | safe | - | J3 header. GPIO18; SDIO command. |
| 27 | 9 | IO9 | strapping | - | J3 header. GPIO9; strapping pin (boot mode). |
| 28 | - | GND | ground | - | J3 header. Ground. |
| 29 | 13 | IO13 | uart | - | J3 header. GPIO13; USB D+ (native USB / USB-Serial-JTAG). |
| 30 | 12 | IO12 | uart | - | J3 header. GPIO12; USB D- (native USB / USB-Serial-JTAG). |
| 31 | - | GND | ground | - | J3 header. Ground. |
| 32 | - | NC | - | J3 header. Not connected. |
Start with these
12 pins with no boot or system involvementFreely assignable - no strapping, flash, USB or JTAG duties. Ideal first picks for buttons, sensors and LEDs.
Fine - with a little care
9 pins · 8 things to knowIO4IO5 Bootstrapping pins; JTAG TMS and TDI; flash data lines on internal-flash models Strapping
Used during boot; required for JTAG debugging; flash data in internal-flash models.
- IO4Bootstrapping pin; JTAG TMS; Flash data (FSPIHD in internal-flash models).
- IO5Bootstrapping pin; JTAG TDI; Flash data (FSPIWP in internal-flash models).
IO6 JTAG TCK; Used for flash clock (internal-flash models). JTAG
Required for JTAG debugging; connected to flash clock in internal-flash models.
IO7 JTAG TDO; Used for flash data (FSPI DO in internal-flash models). JTAG
Required for JTAG debugging; connected to flash data in internal-flash models.
IO8 Boot mode strapping pin; also gates ROM boot message printing (UART_PRINT_CONTROL efuse). Strapping
Determines boot mode; pulling low at reset can prevent normal boot.
TXGPIO16 UART0 TX; Flash CS0 (internal-flash models). UART
Default UART0 transmit pin; using it may interfere with serial console or programming.
RXGPIO17 UART0 RX. UART
Default UART0 receive pin; using it may interfere with serial console or programming.
IO15 JTAG source selection pin. JTAG
Controls JTAG input source at boot; avoid altering its state.
IO9 Boot mode strapping pin. Strapping
Pulling low on reset forces the ESP32-C6 into download mode instead of normal boot.
Only if you know the tricks
2 pins · 1 thing to knowIO13IO12 USB differential data pair (D- and D+) USB
Dedicated to USB communication; avoid if using USB functionality.
- IO13USB D+ (USB communication).
- IO12USB D- (USB communication).
Across 32 pins (2.54 mm pitch), the Espressif ESP32-C6-DevKitC-1 exposes 23 GPIO plus 3V3, 5V and GND for power.
For peripherals, TX/RX on GPIO16 and GPIO17 cover serial logging and flashing.
On the analog side there are 7 ADC-capable pins for sensors and battery monitoring.
If you want zero surprises, IO0, IO1, IO10, IO11 and 8 more are free of any such role - the safest first picks. 9 of the exposed pins carry boot-time or system duties on the ESP32-C6 (IO4, IO5, IO6 and 6 more).
Getting started
flash your first firmware in ~2 minutesBoard: ESP32C6 Dev Module USB CDC On Boot: Enabled Flash Size: 8MB (64Mb) Flash Mode: DIO Partition Scheme: 8M with spiffs (3MB APP/1.5MB SPIFFS) Upload Speed: 921600
// toggle GPIO0 - wire an LED and resistor to it
void setup() {
pinMode(0, OUTPUT);
}
void loop() {
digitalWrite(0, HIGH); delay(500);
digitalWrite(0, LOW); delay(500);
}[env:esp32-c6-devkitc-1]
platform = https://github.com/pioarduino/platform-espressif32/releases/download/stable/platform-espressif32.zip
board = esp32-c6-devkitc-1
framework = arduino
monitor_speed = 115200
upload_speed = 921600esp32-c6-devkitc-1 - or type it after board =.esp32:
board: esp32-c6-devkitc-1
variant: esp32c6
framework:
type: esp-idf
# blink - GPIO0
output:
- platform: gpio
pin: 0
id: led_out
light:
- platform: binary
name: "LED"
output: led_outesp32-c6-devkitc-1 (same ids as PlatformIO).esptool.py --chip esp32c6 --port /dev/ttyACM0 \
--baud 921600 write_flash 0x0 firmware.bin--port = your /dev/tty* (macOS/Linux) or COMx (Windows).Downloads
Free for non-commercial use, credit espboards.dev · License
Board illustration
The bare Espressif ESP32-C6-DevKitC-1 board drawn to scale at 51.8 × 25.4 mm, with no pin labels on it. Made for slide decks, wiring diagrams and project write-ups where a photo is too busy. Take the scalable SVG for print or editing, the high-resolution PNG to drop straight in, or the transparent PNG when you need it with no background behind it.
Pinout diagram
Every pin on both sides of the board with its functions, drawn by ESPboards from the ESP32-C6 Series Datasheet v1.5 - the same sheet shown at the top of this page. The PNG is a high-resolution image for screens, the SVG is vector so it stays sharp at any size, and the PDF is laid out to print on A4 or Letter.
Yours to use, share and adapt for non-commercial work, as long as you credit espboards.dev - the full terms and ready-made credit lines are here.
Specifications
ESP32-C6 · 51.8 × 25.4 mm · vs other ESP32 chips →Dimensions
About this board
At its core is the ESP32-C6 - a RISC-V part adding Wi-Fi 6 plus Thread/Zigbee radios.
Expect to pay about $9.00 - in line with other ESP32-C6 boards.
Onboard you'll find an addressable RGB LED (GPIO8) and Boot/Reset buttons.
Where to buy
prices are typical street pricesResources
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