LILYGO T-Deck Pro: ESP32-S3 e-Paper Development Board with 4G and Voice Options

LILYGO has released the T-Deck Pro, an open-source, feature-phone-form-factor, all-in-one ESP32-S3-based development board. It includes a 3.1-inch 320 x 240 ESP32-S3 e-paper IPS touchscreen LCD, a built-in BlackBerry-style QWERTY keyboard, GPS module, speaker, microphone, 3.5mm audio jack, and integrated IMU and light sensors. With sensors onboard and touchscreen support, the board is suitable for IoT and portable device applications.

T-Deck Pro is offered in two models: A7682E (4G) and PCM5102A (Voice). The A7682E model employs the SIMCom A7682 module for audio operations, whereas the PCM5102A model has support for direct audio output via the ESP32-S3.

For low power consumption and large viewing angles, the ESP32-S3 e-paper display provides improved readability and efficiency. The board also contains the Bosch BHI260AP sensor—an AI smart IMU with a 16-bit 3-axis accelerometer and gyroscope for detecting motion.

LILYGO T-Deck Pro specifications:

• SoC: Espressif ESP32-S3FN16R8
  • CPU: Dual-core 32-bit Tensilica Xtensa LX7 microcontroller @ up to 240 MHz
  • Memory: 8MB PSRAM
  • Storage: 16MB SPI flash
• Storage: MicroSD card slot
• Display: 3.1-inch e-paper display (GDEQ031T10)
  • 320 x 240 resolution with Touchscreen support via CST328 chip
  • Full refresh: 3s; fast refresh: 1s; partial refresh: 0.5s
• Audio:
  • 3.5mm audio jack, Microphone, speaker
  • Optional PCM5102A audio codec (not in 4G LTE version, as the modem handles audio)
  • 112dB SNR and support for 32-bit, 384kHz PCM audio
• Wireless:
  • 2.4 GHz 802.11n Wi-Fi 4 and Bluetooth 5.0 LE connectivity (ESP32-S3)
  • SX1262 LoRa module @ 868/915 MHz; up to +22 dBm Tx power (built-in internal antenna and option for external antenna support)
  • U-blox MIA-M10Q GPS module
  • Optional 4G LTE module (Simcom A7682E) – Not available in version with PCM5102A
• USB: 1x USB Type-C port for power and programming
• User input: QWERTY keyboard using Texas Instruments TCA8418 keypad scan IC
• Sensors: Bosch BHI260AP AI smart sensor with built-in IMU, Lite-on LTR-553ALS light sensor
• Expansion: Qwiic connector
• Misc.:
  • Reset and Boot buttons
  • Vibration motor
• Power Supply:
  • 5V via USB Type-C port
  • 1,400 mAh battery; IO04 ADC pin for battery voltage; TP4065B battery charger chip (based on schematics)
• Dimensions: 120 x 66 x 13.5 mm

The board includes an extended Qwiic interface for connecting additional sensors and peripherals. It is powered by a built-in 1,500mAh battery, managed by the TI BQ25896 charger and BQ27220 fuel gauge for efficient power management.

LILYGO provides documentation and example projects on its GitHub repository, with support for development using PlatformIO, Arduino IDE, and the ESP-IDF framework.

Back in 2023, we covered the original LILYGO T-Deck — a compact, pocket-sized device designed to give developers a convenient, mobile platform for on-the-go programming. It featured a 2.8-inch 320×240 IPS LCD display and a smartphone-like form factor.

LILYGO T-Deck Pro is available in multiple configurations. The PCM5102A (voice) version is priced at $82.99, while the A7682E (4G) version costs $93.98. The device is listed on the LILYGO store, but it’s out of stock there. Alternatively, the 4G voice and audio model are available for purchase from AliExpress for $119.98 (4G-LTE) and for $106.98 (Audio). Currently, the audio model is unavailable on the Amazon store.

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