ESP32-S3 board features 1.91-inch AMOLED display and QMI8658 6-axis motion sensor

Waveshare has launched an ESP32-S3 1.91-inch AMOLED development board with a 6-axis motion sensor designed for the rapid prototyping of IoT and portable projects with interactive displays. The board is built around the ESP32-S3R8 chip, featuring a 32-bit LX7 dual-core processor running at up to 240MHz, with integrated 2.4GHz Wi-Fi and Bluetooth BLE 5. It also includes 16MB Flash, 8MB PSRAM, 512KB SRAM, and 384KB ROM for efficient processing and memory management.

At the core of its display capabilities is a 1.91-inch AMOLED screen with a 240×536 resolution, supporting 16.7 million colors. Powered by the RM67162 controller and connected via the QSPI interface, the display is ideal for running GUI applications like LVGL. The board is available in both touch and non-touch versions, with the touch-enabled models using the FT3168 touch IC. Other features include a QMI8658 6-axis IMU, a microSD card slot, and a Lithium battery header.

The ESP32-S3 1.91-inch AMOLED development board is quite similar to LILYGO’s T-Display-S3 AMOLED</a> with only a few minor differences, such as additional GPIO pins, the inclusion of a microSD card slot, and a 6-axis motion sensor.

Waveshare ESP32-S3-AMOLED-1.91 board specifications:

Wireless MCU – Espressif Systems ESP32-S3R8
- CPU dual-core Tensilica LX7 @ up to 240 MHz with vector instructions for AI acceleration
- Memory – 512KB SRAM and 8MB PSRAM on-chip
- Storage – 384KB ROM
Storage
- 16MB flash
- MicroSD card slot for external storage
Display
- 1.91-inch 536×240 AMOLED display with RM67162 QSPI interface driver; 160-degree wide viewing angle; 16.7M colors
- Brightness – 350 cd/m2
- Contrast Ratio – 100000:1
- FT3168 Touch IC for touch version only
Wireless connectivity
- 2.4 GHz Wi-Fi (802.11 ax/b/g/n) with 40 MHz of bandwidth
- Bluetooth Low Energy subsystem supports Bluetooth 5 (LE) and Bluetooth Mesh
- Ceramic chip antenna and external u.FL antenna connector
USB – 1x USB Type-C port for power and programming
Sensor – QMI8658 6-axis IMU (3-axis accelerometer and 3-axis gyroscope) for detecting motion gestures, counting steps, etc.
Expansion – 2x 20-pin headers with up to 27x GPIO, 8x ADC, 2x I2C, SPI, display and touch interfaces, 5V, 3.3V, and GND
Misc
- Reset and Boot button
- Charging LED indicator
Power Supply
- 5V via USB Type-C port
- Lithium battery recharge/discharge header (MX1.25 3.7V)
Dimensions
- Without touch version – 57.5 mm x 24.5 mm
- With touch version – 59.6 mm x 28.5 mm

The next-generation AMOLED display offers precise light control, delivering improved color accuracy, enhanced picture details, and more vivid video compared to traditional LCDs. The ESP32-S3-AMOLED-1.91 board supports development using the ESP-IDF framework and the Arduino IDE. Designed for Human-Machine Interface (HMI) applications, the display is also compatible with Raspberry Pi Pico HATs. Additionally, it supports the LVGL open-source graphics library enabling efficient embedded GUI development with low memory usage. Detailed information such as schematics, Arduino setup, library installation, and demo code should soon be added to the company’s wiki (Currently empty).

The ESP32-S3 1.91-inch AMOLED development board is available in four variants: with or without touch, and with or without pre-soldered headers. It can be purchased on AliExpress starting at $31.49 plus shipping, or on the Amazon Waveshare store for $39.99 and up. The board is also available on the Waveshare store priced between $29.99 and $35.99.

Sayantan Nandy

Sayantan Nandy, an electronics engineer with over four years of hands-on experience in PCB design, circuit development and power electronics, is proficient in EAGLE CAD, Ki-Cad, and Altium. He has a proven track record of delivering efficient and effective systems. His expertise extends from R&D, and prototyping to production support, making him a valuable asset to any engineering team.