ESP32 C6 Zero Mini
Minimal ESP32-C6 board with RISC-V and modern wireless - ideal for cost-sensitive, compact Matter-based builds.
ESP32 C6 Zero Mini Pinout
25 pins · 2.54 mm pitch
| Pin | GPIO | Labels | Status | Capabilities | Notes |
|---|---|---|---|---|---|
| 1 | - | 5V | power | - | 5V power input for the board |
| 2 | - | GND | ground | - | Ground connection |
| 3 | - | 3V33.3V | power | - | 3.3V power output for peripherals |
| 4 | 16 | TX | uart | uart | TX |
| 5 | 17 | RX | uart | uart | RX |
| 6 | 0 | IO0GP0 | safe | adc | GPIO, ADC pin |
| 7 | 1 | IO1GP1 | safe | adc | GPIO, ADC pin |
| 8 | 2 | IO2GP2 | safe | adc | GPIO, ADC pin |
| 9 | 3 | IO3GP3 | safe | adc | GPIO, ADC pin |
| 10 | 4 | IO4GP4 | strapping | adc | GPIO, ADC pin |
| 11 | 5 | IO5GP5 | strapping | adc | GPIO, ADC pin |
| 12 | 6 | IO6GP6 | strapping | adc | GPIO, ADC pin |
| 13 | 7 | IO7GP7 | strapping | - | GPIO |
| 14 | 8 | IO8GP8 | strapping | - | GPIO, LED |
| 15 | 9 | IO9GP9 | strapping | - | GPIO, BOOT |
| 16 | 12 | IO12GP12 | uart | - | GPIO |
| 17 | 13 | IO13GP13 | uart | - | GPIO |
| 18 | 14 | IO14GP14 | safe | - | GPIO |
| 19 | 15 | IO15GP15 | strapping | - | GPIO |
| 20 | 18 | IO18GP18 | safe | - | GPIO |
| 21 | 19 | IO19GP19 | safe | - | GPIO |
| 22 | 20 | IO20GP20 | safe | - | GPIO |
| 23 | 21 | IO21GP21 | safe | - | GPIO |
| 24 | 22 | IO22GP22 | safe | - | GPIO |
| 25 | 23 | IO23GP23 | safe | - | GPIO |
Start with these
11 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 knowTXGPIO16 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.
IO4IO5 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.
IO9 Boot mode strapping pin. Strapping
Pulling low on reset forces the ESP32-C6 into download mode instead of normal boot.
IO15 JTAG source selection pin. JTAG
Controls JTAG input source at boot; avoid altering its state.
Only if you know the tricks
2 pins · 1 thing to knowIO12IO13 USB differential data pair (D- and D+) USB
Dedicated to USB communication; avoid if using USB functionality.
- IO12USB D- (USB communication).
- IO13USB D+ (USB communication).
The ESP32 C6 Zero Mini breaks out 25 pins in total: 22 GPIO for your project, with 5V, GND and 3V3 handling 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, IO2, IO3 and 7 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 (TX, RX, IO4 and 6 more).
Getting started
flash your first firmware in ~2 minutesBoard: ESP32C6 Dev Module USB CDC On Boot: Enabled Flash Size: 4MB (32Mb) Flash Mode: QIO Partition Scheme: Default 4MB with spiffs (1.2MB 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-zero-mini]
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 ESP32 C6 Zero Mini board drawn to scale at 23.5 × 18 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 · 23.5 × 18 mm · vs other ESP32 chips →Dimensions
About this board
At 23.5 × 18 mm it's the smallest Zero-format board we've measured.
Inside sits the ESP32-C6 - a RISC-V part adding Wi-Fi 6 plus Thread/Zigbee radios. Sibling Zero-format boards cover the ESP32-C3 and ESP32-S3, so you can change radios or horsepower without changing the footprint.
It's the only ESP32-C6 option in the Zero-format family.
Expect to pay about $10.00 - above the ~$6.27 typical for Zero-format boards.
Onboard you'll find an addressable RGB LED (GPIO8) and Reset/Boot buttons.
It flashes over native USB - no serial-converter driver needed.
- ESP32-C6FH4: Built-in dual processors, main frequency is up to 160 MHz
- USB Type-C Port for downloading programme and debugging
- ME6217C33M5G low dropout LDO, 800mA (Max)
- WS2812 RGB LED
- 2.4G ceramic antenna
- BOOT button: Press it and then press the RESET button to enter download mode
- RESET button
- ESP32-C6FH4 pins
Where to buy
prices are typical street pricesResources
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