The Arduino USB Host Shield is an add-on board that gives your Arduino the ability to act as a USB host, so it can talk to USB devices directly instead of only being controlled by a computer. It supports the Google Android ADK (Accessory Development Kit), which makes it a popular choice for connecting an Android phone or tablet to an Arduino-based project. It suits hobbyists, students, electronics makers, and anyone building smart control, automation, or sensor projects — including DIY garden and irrigation controllers.
Key features
- Adds USB host functionality to a standard Arduino board.
- Compatible with the Google Android ADK for Android device communication.
- Stackable shield form factor that sits on top of your Arduino.
- Lets your project read from or control USB peripherals.
- Great for learning embedded USB and rapid prototyping.
Typical uses
- Linking an Android phone or tablet to an Arduino project.
- Connecting USB devices such as keyboards, controllers, or adapters.
- Building interactive control panels and custom automation.
- Educational and maker projects that need USB host support.
How to choose / tips
- Confirm the shield matches your Arduino board's pin layout before stacking.
- Use the matching ADK or USB Host libraries for your sketches.
- Keep wiring tidy and double-check power needs of connected USB devices.
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