Description M5Stack Chain Mono is a compact Chain series LED display node built around an 8x8 LED matrix with white monochrome LEDs. This M5Stack Chain Mono module supports independent pixel control, batch pixel writing, fast full-screen buffer refresh, ASCII character generation, string scrolling, brightness adjustment, and 0/90/180/270-degree screen rotation for dynamic pixel-light effects. Powered by the STM32G031G8U6 controller, M5Stack Chain Mono communicates through a UART daisy-chain LED display protocol at 115200bps. Two HY2.0-4P expansion interfaces allow the 8x8 LED matrix node to connect with other M5Stack Chain series devices, making it suitable for compact indicators, light signage, desktop ambient lighting, and smart-device feedback panels. Features M5Stack Chain series node: Chain Mono fits the modular Chain ecosystem and can be extended with compatible Chain series devices. 8x8 LED matrix: the white monochrome dot matrix is designed for icons, indicators, simple graphics, text effects, and pixel animations. STM32G031G8U6 controller: the onboard MCU handles Chain Mono display control and serial communication. Pixel and buffer control: supports independent pixel control, batch pixel writing, and 8-byte frame-buffer full-screen refresh. Text and animation functions: built-in ASCII character generation, string scrolling up to 256 characters per node, brightness adjustment, and multi-angle screen rotation. UART daisy-chain LED display protocol: communicates through UART 115200bps @ 8N1 for Chain series expansion. Dual HY2.0-4P interfaces: two expansion connectors support Chain series input and output wiring. Specifications Product M5Stack Chain Mono SKU U217 / M5-U217 MCU STM32G031G8U6 Input Power DC 5V Communication UART 115200bps @ 8N1 Interface 2 x HY2.0-4P Display 8x8 LED matrix LED Color White Standby Power DC 5V @ 8.13mA Operating Power DC 5V @ 22.29mA, max brightness with all LEDs on Operating Temperature 0 ~ 40?C Product Size 24.0 x 24.0 x 16.0mm Product Weight 6.2g Package Size 138.0 x 93.0 x 11.0mm Gross Weight 13.2g Applications Pixel light creation with a small white 8x8 LED matrix Desktop ambient lighting and compact light effects Creative light signage, symbols, counters, and scrolling text Smart device indicator lighting and embedded status feedback M5Stack Chain series interactive control panels with Chain DualKey and other Chain nodes Product List 1 M5Stack Chain Mono 1 Chain Bridge Other Content Chain Connection Use the Chain Bridge connector to link the main controller Chain DualKey with each Chain series input or display device. The triangular arrow on the Chain Bridge should point outward from the Chain DualKey. M5Stack Chain Mono can be placed in a Chain series layout with compatible nodes such as Chain Key, Chain Joystick, Chain Encoder, Chain Angle, and Chain ToF. UART PinMap Function STM32G031 Pin UART1 TXD1 PB6 UART1 RXD1 PB7 UART2 TXD2 PA2 UART2 RXD2 PA3 Related M5Stack Chain Products M5Stack Chain Dual Key with ESP32-S3 M5Stack Chain Bridge Connector for Chain Series M5Stack Chain Return Connector for Chain Series M5Stack Chain Mechanical Key Button M5Stack Chain Joystick Resources M5Stack Chain Mono Documentation M5Stack Chain Mono Schematic PDF M5Stack Chain Mono Model Size PDF M5Stack Chain Mono Arduino Tutorial M5Stack Chain Mono Arduino Library M5Stack Chain Mono Internal Firmware M5Stack Chain Mono Communication Protocol M5Stack M5Stack Chain Mono Product Video FAQ What is M5Stack Chain Mono used for? M5Stack Chain Mono is used for compact white LED indicators, pixel art, scrolling text, simple icons, desktop light effects, and smart-device status feedback. How does Chain Mono communicate with the host? M5Stack Chain Mono uses UART 115200bps @ 8N1 and follows the M5Stack Chain series daisy-chain communication protocol. Can several Chain Mono modules be used together? Yes. The two HY2.0-4P interfaces allow this UART daisy-chain LED display node to connect with compatible Chain series devices through Chain Bridge connectors. What is included with M5Stack Chain Mono? The package includes one M5Stack Chain Mono module and one Chain Bridge connector. What makes this different from a general LED matrix module? M5Stack Chain Mono is built for the M5Stack Chain ecosystem, with a compact enclosure, STM32G031G8U6 controller, Chain Bridge wiring, and firmware support for ASCII generation, scrolling strings, rotation, brightness control, and full-screen buffer refresh.
