Update README.md

README.md

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 UsbSerial
 =========
 
-Usb serial controller for Android
+Usb serial controller for Android.
+
+Devices Supported
+--------------------------------------
+[CP210X devices](http://www.silabs.com/products/mcu/pages/usbtouartbridgevcpdrivers.aspx) Default: 9600,8,1,None,flow off
+
+[Bluegiga BLED112 Dongle](https://www.bluegiga.com/en-US/products/bluetooth-4.0-modules/bled112-bluetooth-smart-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);
+~~~
+
+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()); // Important: This operation is synchronous
+~~~
+
+TO-DO
+--------------------------------------
+- Add more devices (pretty obvious)
+- RTS/CTS and DSR/DTR functions needed to raise hardware flow control signals
+- Eventually, write(byte[] buffer) function will be asynchronous
+- 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
+
+
+
+