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The USB  2.0 has HOST (master device) and SLAVE(slave device). Only when a master device and a slave device are connected together, the data transmission can be achieved. With a USB host shield,  you could use your Arduino to interface and control any USB slave device – mouse, keyboard, bluetooth dongles, and much more![/vc_column_text][/vc_column][/vc_row][vc_row][vc_column width=”1/1″][vc_tour][vc_tab title=”Parts List” tab_id=”1395377685-1-69″][vc_column_text]

1. 1 x Arduino Uno
2. 1 x USB Host Shield
3. 1 x 9VDC  Wall Adapter
4. 1 x USB Mouse

[/vc_column_text][/vc_tab][vc_tab title=”Test” tab_id=”1395377685-2-19″][vc_column_text]1. Insert USB Host Shield onto the Arduino Uno, and apply power to the board.

2. Download test library (USB_Host_Shield), copy to directory “arduino-1.5.5/libraries”:

3.  Open the sample code (click on File -> USB_Host_Shield -> HID-> USBHID_desc), and uoload the code to Arduino:

4. After loading the code, connect 9VDC power and USB mouse :

5. Open the serial port monitor (baud rate: 115200), move the mouse, you can see the serial output coordinate information and key events:

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