M5Stack StopWatch – ESP32-S3 Round AMOLED Touch Development Board

M5Stack StopWatch

StopWatch is a round AMOLED touch development board designed for portable and interactive scenarios. It features an ESP32-S3R8 main controller with 16MB Flash and 8MB PSRAM, supports 2.4GHz Wi-Fi wireless communication. The device integrates a 1.75″ AMOLED round touch display, programmable buttons, and vibration feedback to provide an intuitive human-machine interaction experience. It also provides audio input/output, IMU attitude sensing, RTC timekeeping, and multiple expansion interfaces. Together with the M5PM1 multi-level power management system and a 450mAh battery, it can meet diverse development needs such as portable smart control, wearable human-machine interaction, and lightweight IoT terminals.

Key Features

• ESP32-S3R8 Core: Dual-core Xtensa LX7, up to 240MHz, 16MB Flash, 8MB PSRAM, 2.4GHz Wi-Fi
• 1.75″ AMOLED Round Display: 466×466 resolution, CO5300 driver, QSPI interface with CST820B touch
• Rich Interaction: 2× programmable buttons + 1× power button, built-in vibration motor
• Audio System: ES8311 codec, MEMS microphone, AW8737A amplifier
• Motion & Time: BMI270 6-axis IMU, RX8130CE RTC clock chip
• Expansion: HY2.0-4P (Grove-compatible) port, rear 2.54mm expansion bus
• Power: M5PM1 multi-level power management, 450mAh battery, USB Type-C charging
• Design: Lanyard hole + rear magnetic attachment for versatile mounting

Applications

• Portable smart devices & wearables
• Electronic badges & displays
• Lightweight IoT terminals
• Stopwatch / timer projects
• Interactive UI development

Package Contents

• 1× StopWatch