ESP32-S3 4.2 Inch RLCD Development Board 300x400 Resolution XIAOZHI AI Voice Interaction WIFI Bluetooth 5 Dual-mode Communication with LCD Display

Specification:
Product Name: ESP32-S3 4.2inch RLCD Development Board
MCU: ESP32‑S3 dual‑core Xtensa LX7, Wi‑Fi 2.4 GHz + Bluetooth 5
Display: 4.2 inch reflective LCD, black & white, 300 × 400 pixels
Memory: 16 MB Flash, 8 MB PSRAM
Sensors & Chips: SHTC3 temperature & humidity sensor, PCF85063 RTC
Audio: Dual microphones for audio capture, onboard audio codec (I2S), 2‑pin speaker output
Storage: TF (micro‑SD) card slot
Interfaces: 20‑pin DIY expansion header (GPIO / I2C / I2S / UART / ADC / power), USB Type‑C for power & programming
Buttons: BOOT, PWR, user KEY (programmable)
Power Supply: USB Type‑C or single 18650 lithium battery holder onboard
Supported Platforms: ESP‑IDF, ArduinoIDE and other mainstream ESP32 development environments
Board Size (approx.): 92.5 × 70.1 × 13.5 mm (with case & stand, refer to drawing)
Working Mode Examples: clock, calendar, weather display, AI assistant front‑end, music player, information screen, etc.

Features:
1. High‑contrast 4.2" reflective LCD: clear black‑and‑white display, easy to read under strong ambient light, perfect for clocks, text and simple graphics.
2. AI voice interaction ready: built‑in microphones and speaker interface plus Wi‑Fi make it suitable as a smart assistant terminal for cloud large‑model applications.
3. Rich hardware resources: 16 MB Flash, 8 MB PSRAM and TF card slot give enough space for complex applications, fonts, images and audio files.
4. All‑in‑one desktop form factor: integrated 18650 battery holder, side USB‑C port and foldable acrylic stand allow direct use on the desk as a finished gadget.
5. Multiple connectivity options: Wi‑Fi, Bluetooth 5 and full GPIO/I2C/I2S/UART/ADC out let you add sensors, relays, lights and more for IoT prototypes.
6. Friendly for beginners & makers: works with ArduinoIDE and ESP‑IDF, example uses include e‑paper‑style clock, weather station, calendar, countdown timer and music player.

Package Includes:
Option A-With Battery
1 x ESP32‑S3 Development Board
1 x Rechargeable 18650 Lithium Battery
1 x 2PIN Speaker
2 x Acrylic Stand
1 x Screwdriver

Option B-Without Battery
1 x ESP32‑S3 Development Board
1 x 2PIN Speaker
2 x Acrylic Stand
1 x Screwdriver