LILYGO T-QTC6 – An ESP32-C6 IoT controller with a 0.85-inch touchscreen LCD

LILYGO T-QTC6 is a cute little IoT controller based on an ESP32-C6 WiFi 6, Bluetooth 5.4 LE, and 802.15.4 wireless microcontroller and a 0.85-inch touchscreen color LCD that can be powered via USB-C or a LiPo battery with the board also supporting charging.

The device, sometimes called “T-QT C6” (with a space), also comes with an 8-pin female connector with five GPIOs and a Qwiic connector for UART modules. It’s another addition to the T-QT family with ESP32 wireless microcontrollers and a tiny 0.85-inch display such as the T-QT Pro or the T-QT V1.1. But note that those are development boards, while the T-QTC6 feels more like a complete device.

LILYGO T-QTC6 specifications:

• Wireless Module – Espressif Systems ESP32-C6-MINI-1U
  • SoC – ESP32-C6-FH4 32-bit RISC-V microprocessor up to 160 MHz with 320KB ROM, 512KB HP SRAM, 16KB LP SRAM, 4MB flash
  • Memory – 4MB PSRAM (TBC)
  • Wireless
    • 2.4 GHz WiFi 6 with Target Wake Time (TWT) support
    • Bluetooth 5.4 LE and Mesh
    • 802.15.4 radio with Zigbee, Thread, and Matter
  • IPEX antenna connector
• Display – 0.85-inch TFT display with 128×128 resolution through GC9107 SPI driver; capacitive touchscreen via CST816T I2C chip
• USB – 1x USB-C port for power and programming
• Expansion
  • 8-pin female connector with 5x GPIO, 5V. 3.3V, GND
  • 4-pin Qwiic UART connector (3.3V)
• Misc
  • On/Off switch
  • Reset and Boot buttons
  • Breathing light (LED connected to IO09)
  • Version 1.2 – LSM6DSLTR 6-axis motion sensor (Not sold yet)
• Power Management
  • 5V/500mA via USB-C port
  • Version 1.0-1.1 – ETA4662 I2C PMIC (Sold on Aliexpress)
  • Version 1.2 – SGM41562 I2C PMIC (Not sold yet)
  • Battery level detection through ADC pin
  • Consumption – As low as 100uA in deep sleep mode
• Dimensions – 29 x 24 x 15mm; M1.4 mounting thread (TBC)

LILYGO provides support for Arduino/PlatformIO with several Arduino sketches including the factory testing program shown in the photo above relying on Arduino GFX and LVGL graphics libraries. You’ll find those along with the PDF schematics, firmware files, and tools on GitHub.

The LILYGO T-QTC6 ESP32-C6 IoT controller is sold for $24.98 on AliExpress with free shipping, a 2-wire power cable for a battery, and an 8-pin male header, and you’ll also find it on Amazon for $25. I understand it’s version V1.1, as the V1.2 model with a 6-axis IMU and a different PMIC is not for sale just yet.

Jean-Luc Aufranc (CNXSoft)

Jean-Luc started CNX Software in 2010 as a part-time endeavor, before quitting his job as a software engineering manager, and starting to write daily news, and reviews full time later in 2011.

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