UsbSerial

Usb serial controller for Android.

Devices Supported

CP210X devices Default: 9600,8,1,None,flow off

Bluegiga BLED112 Dongle Default 115200,8,1,None,flow off

How to use it?

Instantiate a new object of the desired device you want to handle

UsbDevice device;
UsbDeviceConnection usbConnection;
...
CP2102SerialDevice cp2102 = new CP2102SerialDevice(device, usbConnection);
//UsbSerialDevice bled112 = new BLED112SerialDevice(device, usbConnection);

Open the device and set it up as desired

cp2102.open();
cp2102.setBaudRate(115200);
cp2102.setDataBits(UsbSerialInterface.DATA_BITS_8);
cp2102.setParity(UsbSerialInterface.PARITY_ODD);

There is no need to be polling if you want to perform a bulk transaction to a IN endpoint. Define a simply callback

private UsbSerialInterface.UsbReadCallback mCallback = new UsbSerialInterface.UsbReadCallback() {

		@Override
		public void onReceivedData(byte[] arg0) 
		{
			// Code here :)
		}
		
};

And pass a reference of it

cp2102.read(mCallback);

Write something

cp2102.write("DATA".getBytes()); // Async-like operation now! :)

Close the device:

cp2102.close();

In Android usb api, when a usb device has been close it must be reopened

UsbDevice device;
...
UsbManager manager = (UsbManager) getSystemService(Context.USB_SERVICE);
manager.openDevice(UsbDevice device)

TO-DO

• Add more devices (pretty obvious)
• RTS/CTS and DSR/DTR functions needed to raise hardware flow control signals
• A serious refactoring is needed to move common logic to UsbSerialDevice (This would help other people to add new devices)
• Whatever you think can be a good addition

A little history about why I am doing this