The ESP32-S3-RLCD-4.2 is a powerful AIoT development board built around the ESP32-S3, combining a low-power 4.2-inch reflective LCD with wireless connectivity, audio, sensors, and expandable interfaces.
Its 300 × 400 reflective display does not require a backlight and uses ambient light for visibility, providing an e-paper-like reading experience while offering faster refresh rates.
Key Features
- ESP32-S3 dual-core processor up to 240 MHz
- 16 MB Flash + 8 MB PSRAM
- 2.4 GHz Wi-Fi and Bluetooth 5 LE
- 4.2-inch reflective LCD
- 300 × 400 resolution
- Black-and-white display with no backlight
- Built-in SHTC3 temperature and humidity sensor
- Real-time clock (RTC) with PCF85063
- Dual microphone array with echo-cancellation support
- Built-in ES8311 audio codec
- Speaker connector
- TF/microSD card slot for external storage
- 18650 battery holder with charging and power management
- Programmable KEY and BOOT buttons
- USB Type-C for programming and serial logging
- UART, I²C and GPIO interfaces for expansion
- 2 × 8-pin expansion header with 2.54 mm pitch
Ideal for R1BBIT
The board is particularly suitable for projects requiring a large low-power display, sensors, wireless connectivity, and audio in a single device. It can be used for smart dashboards, electronic calendars, environmental monitors, AI assistants, IoT controllers, and interactive desktop devices.
With R1BBIT, the ESP32-S3-RLCD-4.2 can become an accessible platform for creating these projects without requiring complex low-level programming.
