Description M5Stack Chain RGB is a compact 8x8 full-color RGB LED matrix node in the M5Stack Chain series. It combines a 64-pixel WS2812E RGB LED matrix, an STM32G031G8U6 controller and UART daisy-chain communication in a 24.0 x 24.0 x 16.0 mm display module for pixel art, scrolling text, status indicators and interactive lighting. The Chain RGB matrix supports individual pixel control, batch pixel writing and high-speed full-screen buffer refresh. With RGB565 color format, a 64-pixel RGB565 frame buffer, built-in ASCII character font engine, multi-level brightness adjustment and screen rotation at 0, 90, 180 and 270 degrees, M5-U218 is suitable for small LED signage, desktop ambience lighting, maker dashboards and modular M5Stack Chain input or display systems. Developers looking for an M5Stack RGB matrix, 8x8 LED matrix, WS2812E matrix, UART LED display, RGB565 pixel display, Chain RGB module, HY2.0-4P lighting node or daisy-chain LED indicator can use M5-U218 to build repeatable visual feedback with clear software resources, Arduino support, communication protocol documentation and official schematic files. Features M5Stack Chain series full-color LED dot matrix display node for modular lighting and status display projects. 8x8 RGB LED matrix with 64 x WS2812E addressable LEDs for pixel art, icons, animations and pattern effects. STM32G031G8U6 core MCU handles LED refresh, character rendering and UART serial communication. RGB565 individual pixel control and batch writing for efficient custom pattern updates. 64-pixel RGB565 frame buffer supports high-speed full-screen refresh for smoother LED animation. Built-in ASCII character font engine supports scrolling text display with fixed color or gradient effects. Scrolling text supports up to 32 characters per Chain RGB node according to the official documentation. Screen rotation supports 0, 90, 180 and 270 degrees for flexible panel orientation and viewing angles. UART daisy-chain communication protocol works at 115200bps 8N1 for serial Chain series control. 2 x HY2.0-4P expansion ports make it easy to connect Chain Bridge and additional M5Stack Chain devices. 5V input, low standby current and compact 6.5 g body support portable indicators and embedded enclosures. Official warning recommends about 50 percent brightness for long operation to reduce heat, power consumption and LED stress. Specifications SKU M5-U218 Product name M5Stack Chain RGB Matrix with 8x8 LEDs Series M5Stack Chain series MCU STM32G031G8U6 Input power DC 5V Communication UART 115200bps at 8N1 Interface 2 x HY2.0-4P expansion ports RGB LED 64 x WS2812E Matrix layout 8 x 8 full-color RGB LED dot matrix Color format RGB565 Frame buffer 64-pixel RGB565 frame buffer Text engine Built-in ASCII character font engine, scrolling string display up to 32 characters per node Rotation 0, 90, 180 and 270 degrees Standby power DC 5V at 13.46mA Working power DC 5V at 127.51mA, max brightness white Working temperature 0 to 40 degrees C Product size 24.0 x 24.0 x 16.0 mm Product weight 6.5 g Package size 138.0 x 93.0 x 11.0 mm Gross weight 13.5 g Applications Pixel light art, icon panels and compact RGB animation displays for maker projects. Desktop ambience lighting, notification lamps and small programmable mood-light installations. Creative signage, scrolling text labels, interactive badges and embedded LED message boards. Smart device status indicators for IoT prototypes, test rigs, automation panels and dashboard nodes. M5Stack Chain series teaching demos that explain UART daisy-chain control, RGB565 color and addressable LED matrices. Product List 1 x Chain RGB 1 x Chain Bridge Other Content These official visual resources help explain how the Chain RGB module is connected, wired and mounted in an M5Stack Chain system. Chain connection direction. Use the Chain Bridge connector to connect the controller and Chain series devices; the triangle arrow direction helps prevent reversed Chain wiring. Schematic preview. The schematic reference is useful when checking UART routing, STM32G031 pins, HY2.0-4P connections and power design for integration work. Model size drawing. The mechanical drawing shows the compact 24.0 x 24.0 x 16.0 mm body, which helps when planning enclosures, panels and multi-node LED layouts. Resources Official M5Stack Chain RGB documentation Chain RGB Arduino guide M5Stack M5Chain Arduino library on GitHub Chain RGB internal firmware on GitHub Chain RGB communication protocol PDF Chain RGB schematic PDF Chain RGB model size PDF Chain RGB product introduction video FAQ What is M5-U218 used for? M5-U218 is used as an 8x8 RGB LED matrix for pixel art, scrolling text, creative signage, device status indication and compact lighting feedback in M5Stack Chain projects. Which LEDs does the Chain RGB use? It uses 64 x WS2812E RGB LEDs arranged as an 8x8 full-color LED dot matrix. How does it communicate? The module uses UART serial daisy-chain communication at 115200bps 8N1 through two HY2.0-4P Chain ports. Can it display text? Yes. It includes an ASCII character font engine and supports scrolling text with fixed colors or color gradient effects, up to 32 characters per node. Can I run it at full brightness continuously? For long operation, the official guidance recommends about 50 percent brightness to reduce heat, power consumption and stress on the WS2812E LEDs.
