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 466x466 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 8Ω 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 + 8Ω 2W speaker * Case version - Board + 8Ω 2W speaker + Case * GPS version - Board + 8Ω 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 * 8Ω 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? * ESP32-S3R8 * SoC with Wi-Fi and Bluetooth, operating at up to 240 MHz, with onboard 8MB PSRAM * Onboard antenna * Supports 2.4 GHz Wi-Fi (802.11 b/g/n) and Bluetooth 5 (LE) * IPEX1 connector * Allows switching to an external antenna by re-soldering an onboard resistor * PWR button * System power ON/OFF control, supports custom functions * BOOT button * Used for device start-up and function debugging * MX1.25 2-pin speaker header * TCA9554 * GPIO expander chip * PCF85063 * RTC chip * QMI8658 * 6-axis IMU including a 3-axis gyroscope and 3-axis accelerometer * AXP2101 * Highly integrated power management IC * 2.54 mm 8-pin header * For debugging and connecting peripherals * Dual microphones * With onboard echo cancellation circuitry for improved audio capture quality * IPEX1 GPS connector * For connecting a GPS antenna (GPS version only, with built-in LC76G module) * USB-C port * ESP32-S3 USB interface for firmware flashing and log output * ES7210 * Echo cancellation algorithm chip for reducing echo and improving audio capture accuracy * MX1.25 lithium battery header * MX1.25 2-pin connector for a 3.7 V lithium battery, supports charging and discharging * 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 (466x466) * 1x 8Ω 2W speaker Case version: * 1x ESP32-S3 1.75" AMOLED Round Touch Display Dev Board (466x466) * 1x 8Ω 2W speaker * 1x Protective Case GPS version: * 1x ESP32-S3 1.75" AMOLED Round Touch Display Dev Board (466x466) * 1x 8Ω 2W speaker * 1x GNSS ceramic antenna