How to receive data from Xbee Radio Module in AT Coordinator mode connected on Raspberry Pi

Hi friends, I am puzzled about reading data received on serial port on Raspberry Pi, I have connected Xbee Pro S2 in coordinator AT mode on usb that means my serial port is ttyUSB0 but I am unable to read data. My transmitter is Xbee Router AT mode on arduino Please help with some C code, python cod...

Thanks for all the replies but my question was not exactly answered.

If I am not implemeting GPS Module on UART, neither USB too then I have been left with SPI & I2C Interface

So please help with I2C and SPI GPS solutions

I have started using Raspberry Pi a few time ago, its interesting to use. I have some questions 1. I need to know GPS modules which I can interface with Raspberry Pi on I2C or SPI interface because my UART is busy 2. I studies a lot and found that I2C interface is slow but battery saver and SPI is f...