The Chain Joystick is a high-precision Hall effect joystick module with X/Y analogue input, Z-axis key input, RGB status LED and Chain-series expansion support ideal for robot control and interactive projects. The Chain Joystick is a high-precision Hall effect joystick input node in the M5Stack Chain series. It supports three-axis control, with analogue input on the X and Y axes and a digital key input on the Z axis. By using a Hall effect joystick to detect changes in magnetic fields, it delivers accurate, responsive control without physical contact. This non-contact design provides excellent wear resistance, high accuracy and strong immunity to interference, helping ensure stable performance and a long service life. A programmable RGB LED is also built in, allowing clear status indication and interactive visual feedback. The Chain Joystick is well suited to applications such as humanmachine interfaces, robot control, and other interactive control systems. At its core, the device integrates an STM32G031G8U6 microcontroller and uses a UART-based serial cascading communication protocol. With two HY2.0-4P expansion ports, it can be easily connected to other Chain series modules, making it simple to build more complex and feature-rich interactive setups. Features M5Stack Chain series High-precision Hall effect joystick STM32G031G8U6 core controller X/Y/Z three-axis input 1x RGB LED UART serial cascading communication protocol 2x HY2.0-4P expansion interfaces supporting Chain series extensions Specifications MCU STM32G031G8U6 Input Power DC 5V Communication Interface UART Interface Type 2x HY2.0-4P RGB LED 1x WS2812C Operating Power Consumption 25.4mA Operating Temperature 0 ~ 40C Product Size Product Weight 23.9 x 23.9 x 30.4mm 8.6g Resources Documents Package Contents 1 x Chain Joystick 1 x Chain Bridge