The M5Stack Atomic ToUnit Base adapts Atom series bottom I/O to a male HY2.0-4P connector, letting you connect M5Stack Unit modules directly. A built-in DIP switch makes signal routing simple for clean, flexible expansions. The M5Stack Atomic ToUnit Base is an interface adapter board made for M5Stack Atom series controllers. It converts the Atom controller’s bottom expansion I/O into a male HY2.0-4P connector, allowing you to connect directly to M5Stack Unit series modules without extra wiring. A built-in DIP switch provides flexible configuration of the Atom bottom I/O connections, making it easier to route signals depending on the Unit device you’re using. With this adapter, Atom and Unit series hardware can be expanded and interconnected cleanly, opening up a wider range of project and application options. Features * Atom controller bottom I/O expansion for Unit devices * Built-in DIP switch for flexible IO pin configuration Specifications * Size: 30.2 x 24.0 x 13.1mm * Weight: 4.6g Resources * Documents Package Contents * 1 x Atomic ToUnit Base * 1 x Hex Key L-Shape 1.5mm (For M2 Screw) * 1 x M2 * 10mm Screw (pan head, self-tapping) * 1 x DIP Switch Label Sticker