M5Stack StopWatch 1.75-inch AMOLED

M5Stack said on May 22 that it had launched StopWatch, a round AMOLED touch development board aimed at portable and interactive projects. The company described the device as an “expressive interface” for interactive IoT applications and said it was built around Espressif’s ESP32-S3R8. The launch was published on M5Stack’s Shopify news page and paired with a live product listing on its store. (shop.m5stack.com) The board is available at $45 on M5Stack’s Shopify storefront, which showed more than 10 units in stock when checked on Friday. ### What exactly did M5Stack put on sale on May 22? M5Stack’s May 22 announcement described StopWatch as a compact development board with a 1.75-inch round AMOLED touch display, programmable buttons, vibration feedback, audio input and output, motion sensing and real-time clock support. The company said the product was designed for portable smart devices, wearable projects and lightweight IoT terminals. The Shopify product page lists the board as “M5Stack Stopwatch Dev Kit (ESP32-S3)” under SKU C152. (shop.m5stack.com) The same listing says the device includes two programmable buttons, one power button, a lanyard hole and rear magnetic attachment support. ### Which chips and components are inside the board? The core processor is an ESP32-S3R8, which M5Stack says is paired with 16MB of flash and 8MB of PSRAM. The company also lists 2.4GHz Wi-Fi, a 6-axis BMI270 inertial measurement unit, an RX8130CE real-time clock chip, an ES8311 audio codec, a MEMS microphone and an AW8737A amplifier. (shop.m5stack.com) The display is specified at 1.75 inches with a 466x466 resolution, using a CO5300 driver chip and QSPI interface, according to the product page. Touch input is handled by a CST820B driver chip. (shop.m5stack.com) ### How portable is it as a wearable-style dev board? M5Stack lists the StopWatch at 52.0 x 52.0 x 15.5 mm and 39.0 grams, with a built-in 450mAh battery and USB Type-C power input. The company said the board uses its M5PM1 multi-level power management system for standalone operation. (shop.m5stack.com) The hardware layout also includes a HY2.0-4P expansion interface and rear expansion buses labeled 2.54-7P and 2.54-6P. M5Stack said those interfaces are intended for prototyping and peripheral integration. (shop.m5stack.com) ### What kinds of projects is M5Stack targeting? M5Stack’s announcement names portable smart devices, electronic badges and lightweight IoT terminals as target applications. The company also said the combination of motion sensing, haptic feedback, timekeeping and audio support could be used for wearable devices, handheld controllers and context-aware embedded applications. (shop.m5stack.com) The blog post says the board supports libraries and examples compatible with LVGL and SquareLine Studio, which are commonly used for embedded user-interface work. (shop.m5stack.com) That positions the device as a display-first board rather than a general-purpose controller without a built-in interface. ### Where can buyers get it now? M5Stack’s Shopify store listed the StopWatch at $45 and marked it as in stock on May 22. M5Stack’s main storefront also names AliExpress among its official purchase channels, and the social briefing tied the launch to an M5Stack post on X on the same day. (shop.m5stack.com) M5Stack’s next step for buyers is straightforward: the Shopify listing includes immediate purchase and checkout options, and the product page links to documentation for development work. (shop.m5stack.com 1) (shop.m5stack.com 2)