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LilyGO T7-C6
Feature-rich ESP32-C6 board with extended I/O and USB-C - great for prototyping connected devices with Matter support.
41 × 27 mm
ESP32-C6
RISC-V MCU
160MHz
clock
4MB
flash
512KB
SRAM
17· 7 ADC
GPIO
BLE 5.3+ WiFi
radio
Pinout
25 pins · 2.54 mm pitch
| Pin | GPIO | Labels | Status | Capabilities | Notes |
|---|---|---|---|---|---|
| 1 | 23 | IO23SDIO-D3 | safe | - | Left header. GPIO; SDIO data 3. |
| 2 | 22 | IO22SDIO-D2 | safe | - | Left header. GPIO; SDIO data 2. |
| 3 | 21 | IO21SDIO-D1 | safe | - | Left header. GPIO; SDIO data 1, FSPI chip select. |
| 4 | 20 | IO20SDIO-D0 | safe | - | Left header. GPIO; SDIO data 0, FSPI chip select. |
| 5 | 19 | IO19SDIO-CLK | strapping | - | Left header. GPIO; SDIO clock, FSPI chip select. |
| 6 | 18 | IO18SDIO-CMD | strapping | - | Left header. GPIO; SDIO command, FSPI chip select. |
| 7 | - | GND | ground | - | Left header. Ground. |
| 8 | - | 5V | power | - | Left header. 5V input/output (USB VBUS). |
| 9 | 8 | IO8 | strapping | - | Left header. GPIO; strapping pin (boot mode). |
| 10 | 15 | IO15 | strapping | - | Left header. GPIO; strapping pin. |
| 11 | - | RST | control | - | Right header. Chip reset (active low). |
| 12 | 3 | IO3 | safe | adc | Right header. GPIO; ADC1 channel 3. |
| 13 | 4 | IO4MTMS | strapping | adc | Right header. GPIO; ADC1 channel 4, JTAG MTMS. |
| 14 | 5 | IO5MTDI | strapping | adc | Right header. GPIO; ADC1 channel 5, JTAG MTDI. |
| 15 | 0 | IO0 | safe | adc | Right header. GPIO; ADC1 channel 0. |
| 16 | 1 | IO1 | safe | adc | Right header. GPIO; ADC1 channel 1. |
| 17 | 6 | IO6MTCK | strapping | adc | Right header. GPIO; ADC1 channel 6, JTAG MTCK. |
| 18 | - | 3V33.3V | power | - | Right header. 3.3V regulated output. |
| 19 | 7 | IO7MTDO | strapping | - | Right header. GPIO; JTAG MTDO. |
| 20 | 14 | IO14 | safe | - | Right header. GPIO. |
| 21 | - | VBUS | power | - | Center USB pad. USB-C VBUS (5V). |
| 22 | - | G | ground | - | Center USB pad. Ground. |
| 23 | 12 | D- | usb | - | Center USB pad. USB-C D- data line (native USB). |
| 24 | 13 | D+ | usb | - | Center USB pad. USB-C D+ data line (native USB). |
| 25 | 2 | IO2 | safe | adc | Onboard battery voltage divider (reads LiPo voltage / 2); not broken out to a header. |
Start with these
9 pins with no boot or system involvementIO23SDIO-D3IO22SDIO-D2IO21SDIO-D1IO20SDIO-D0IO3IO0IO1IO14IO2
Freely assignable - no strapping, flash, USB or JTAG duties. Ideal first picks for buttons, sensors and LEDs.
Fine - with a little care
sampled at boot or shared with debug/serial| Pin | Label | What to know | Role |
|---|---|---|---|
| IO8 | GPIO8 | Determines boot mode; pulling low at reset can prevent normal boot. | Strapping |
| IO15 | JTAG_SEL | Controls JTAG input source at boot; avoid altering its state. | JTAG |
| IO4 | MTMS | Used during boot; required for JTAG debugging; flash data in internal-flash models. | Strapping |
| IO5 | MTDI | Used during boot; required for JTAG debugging; flash data in internal-flash models. | Strapping |
| IO6 | MTCK | Required for JTAG debugging; connected to flash clock in internal-flash models. | JTAG |
| IO7 | MTDO | Required for JTAG debugging; connected to flash data in internal-flash models. | JTAG |
Only if you know the tricks
wired to flash or USB - expect a fight| Pin | Label | What to know | Role |
|---|---|---|---|
| IO19 | FSPID | Connected to internal flash; using as GPIO can disrupt flash operations. | Flash |
| IO18 | FSPIQ | Connected to internal flash; using as GPIO can disrupt flash operations. | Flash |
| D- | USB_D- | Dedicated to USB communication; avoid if using USB functionality. | USB |
| D+ | USB_D+ | Dedicated to USB communication; avoid if using USB functionality. | USB |
These are recommendations, not hard rules - with the right pull-ups, timing and boot-state awareness most pins can be made to work. When in doubt, start green.
Pinout notes The LilyGO T7-C6 pinout brings out 25 pins at a 2.54 mm pitch - 17 usable GPIO alongside the GND , 5V , 3V3 , VBUS and G power rails. Beyond plain digital I/O…
The LilyGO T7-C6 pinout brings out 25 pins at a 2.54 mm pitch - 17 usable GPIO alongside the GND, 5V, 3V3, VBUS and G power rails.
Beyond plain digital I/O you get 7 ADC-capable pins for sensors and battery monitoring.
6 of the exposed pins carry boot-time or system duties on the ESP32-C6 (IO8, IO15, IO4 and 3 more) - check the guidance above before wiring anything to them. IO23, IO22, IO21, IO20 and 5 more are free of any such role - the safest first picks.
Getting started
flash your first firmware in ~2 minutes1
Connect over USB
Native USB - no driver, no serial chip. Not detected? Hold BOOT while plugging in.
2
Flash with your tool
Arduino IDE, PlatformIO, ESPHome or esptool - copy the settings on the right.
3
Verify it runs
The blink example uses GPIO23 - swap for your board's LED pin if different.
Board: T7 C6
USB CDC On Boot: Enabled
Flash Size: 4MB · QIO
Upload Speed: 921600
// blink
pinMode(23, OUTPUT);
digitalWrite(23, LOW); // on (often inverted)[env:t7-c6]
platform = espressif32
board = esp32-c6-devkitc-1
framework = arduino
monitor_speed = 115200
upload_speed = 921600esp32:
board: esp32-c6-devkitc-1
variant: T7_C6
framework:
type: esp-idf
# blink - GPIO23
output:
- platform: gpio
pin: 23
id: led_out
light:
- platform: binary
name: "LED"
output: led_outesptool.py --chip esp32c6 --port /dev/ttyACM0 \
write_flash 0x0 firmware.binBuild details: sketch space 1966080 B · data 655360 B · QIO
Good to know
board-specific quirks worth 60 seconds
Specifications
ESP32-C6 · 41 × 27 mmCompute
MCU
ESP32-C6 · RISC-V
Clock
160 MHz
SRAM · Flash
512 KB · 4MB
Radio
Wi-Fi
802.11 ax b/g/n
Bluetooth
5.3 LE
Antenna
PCB
I/O
GPIO · ADC
17 · 7
UART · I²C · SPI
2 · 2 · 2
PWM
6 channels
Power
USB
USB-C
Serial
Native (CDC)
Boot address
0x0
Flashing
Upload · OTA
esptool_py · esp_ota
Flash · Boot mode
QIO · QIO
Sketch · Data
1.88 MB · 640 KB
41 × 27 mm · pin pitch 2.54 mm
The LilyGO T7-C6 uses esptool_py for firmware uploads, esp_ota for over-the-air (OTA) updates. Flash mode is QIO with QIO boot mode. The maximum sketch size is 1.88 MB with 640 KB available for data.
About this board
Inside sits the ESP32-C6 - a RISC-V part adding Wi-Fi 6 plus Thread/Zigbee radios.
At $15.00 it's on the expensive side for an ESP32-C6 board - most land around $10.
Around the module: a Qwiic connector, battery charging (TP4065) via JST-GH 1.25 and Boot/Reset buttons.
It flashes over native USB - no serial-converter driver needed, which isn't a given among ESP32-C6 boards.
- RISC-V ESP32-C6 processor with ultra-low power consumption
- Supports WiFi 6, Bluetooth 5 (LE), and Zigbee
- Compact design ideal for IoT and sensor applications
- USB-C for programming and power
Where to buy
prices are typical street pricesLilyGO T7-C6
$15.00per unit, typical
Resources
Schematic github.com↗ 3D model github.com↗ ESP32-C6 datasheet espressif.com↗ LilyGO T7-C6 Product Page lilygo.cc↗Xinyuan-LilyGO/T7-C6 GitHub (schematic, specs, TP4065 datasheet) github.com↗LILYGO T7-C6 Overview - Electronics-Lab electronics-lab.com↗LILYGO T7-C6 User Manual with official PINMAP - manuals.plus manuals.plus↗Espressif ESP32-C6 Series Datasheet (pin functions, ADC1, strapping) espressif.com↗
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