This is a 1.75″ display development board based on the ESP32-S3, with a range of neat features, and three different hardware variants options!

The board is controlled by an ESP32-S3R8 Xtensa 32-bit LX7 dual-core processor with up to 240MHz main frequency, supported by 512KB of SRAM and 384KB ROM, with onboard 8MB PSRAM and an external 16MB Flash memory. It supports 2.4GHz Wi-Fi (802.11 b/g/n) and Bluetooth 5 (LE), with an onboard antenna.

The display is a 1.75″ AMOLED touchscreen panel with a 466×466 resolution, offering 16.7m colours. Compared to traditional LCDs, AMOLED offers better light control, with sharper detail and more vivid colours.

The rear of the board also features a dual microphone array for audio algorithms such as noise reduction and echo cancellation, suitable for accurate speech recognition and near-field / far-field voice wake-up applications. An 8 2W speaker is also included for the dedicated speaker header. There’s also a 6-axis IMU (3-axis accelerometer and 3-axis gyroscope), onboard RTC and a slot for a microSD card.

The board is powered and programmed via USB-C. Power can also be provided via the MX1.25/PicoBlade-compatible lithium battery recharge/discharge header (we sell compatible batteries in the store). IO is available via the onboard 8-pin header, providing 3x GPIO (16/17/18), UART (RX/TX) and power pins (VBUS/GND/3.3V).

Variants available

We offer this dev board in three different flavours:

• Standard version – Board + 8 2W speaker
• Case version -Board + 8 2W speaker + Case
• GPS version – Board + 8 2W speaker + GNSS ceramic antenna

Features

• ESP32-S3R8 dual-core Xtensa LX7 processor running at up to 240MHz
• 2.4GHz Wi-Fi (802.11 b/g/n) and Bluetooth 5 (LE) with onboard antenna
• 512KB SRAM and 384KB ROM, with onboard 8MB PSRAM and external 16MB Flash
• 1.75″ AMOLED capacitive touchscreen, 466 466 resolution, 16.7M colours
• AMOLED panel with high contrast, wide viewing angles, fast response and low power consumption
• CO5300 display driver (QSPI) and CST9217 capacitive touch controller (I2C)
• Dual microphone array for noise reduction, echo cancellation and voice wake-up applications
• 8 2W speaker output via dedicated speaker header
• QMI8658 6-axis IMU (3-axis accelerometer and 3-axis gyroscope)
• PCF85063 RTC with battery-backed operation via AXP2101 power management IC
• MicroSD slot for external storage and media playback
• USB-C port for power, programming and debugging
• MX1.25/PicoBlade-compatible 3.7V lithium battery charge/discharge header
• 8-pin 2.54mm header providing GPIO, UART and power connections, with additional expansion pads
• PWR and BOOT programmable buttons for custom function control

What’s onboard?

1. ESP32-S3R8
   • SoC with Wi-Fi and Bluetooth, operating at up to 240MHz, with onboard 8MB PSRAM
2. Onboard antenna
   • Supports 2.4GHz Wi-Fi (802.11 b/g/n) and Bluetooth 5 (LE)
3. IPEX1 connector
   • Allows switching to an external antenna by re-soldering an onboard resistor
4. PWR button
   • System power ON/OFF control, supports custom functions
5. BOOT button
   • Used for device start-up and function debugging
6. MX1.25 2-pin speaker header
7. TCA9554
   • GPIO expander chip
8. PCF85063
   • RTC chip
9. QMI8658
   • 6-axis IMU including a 3-axis gyroscope and 3-axis accelerometer
10. AXP2101
    • Highly integrated power management IC
11. 2.54mm 8-pin header
    • For debugging and connecting peripherals
12. Dual microphones
    • With onboard echo cancellation circuitry for improved audio capture quality
13. IPEX1 GPS connector
    • For connecting a GPS antenna (GPS version only, with built-in LC76G module)
14. USB-C port
    • ESP32-S3 USB interface for firmware flashing and log output
15. ES7210
    • Echo cancellation algorithm chip for reducing echo and improving audio capture accuracy
16. MX1.25 lithium battery header
    • MX1.25 2-pin connector for a 3.7V lithium battery, supports charging and discharging
17. TF card slot

Resources

• Product wiki
• Arduino IDE guide
• ESP-IDF guide
• Schematic
• Dimensions

Datasheets

• ESP32-S3 Series Datasheet
• QMI8658 Datasheet
• PCF85063 Datasheet
• AXP2101 Datasheet
• ES8311 Datasheet
• ES8311 User Guide

Package contents

Standard version:

• 1x ESP32-S3 1.75″ AMOLED Round Touch Display Dev Board (466×466)
• 1x 8 2W speaker

Case version:

• 1x ESP32-S3 1.75″ AMOLED Round Touch Display Dev Board (466×466)
• 1x 8 2W speaker
• 1x Protective Case

GPS version:

• 1x ESP32-S3 1.75″ AMOLED Round Touch Display Dev Board (466×466)
• 1x 8 2W speaker
• 1x GNSS ceramic antenna