import time
from pyad2 import AD2
from pyad2.devices import SerialDevice

# Configuration values
SERIAL_DEVICE = '/dev/ttyUSB0'
BAUDRATE = 115200

def main():
    """
    Example application that opens a serial device and prints messages to the terminal.
    """
    try:
        # Retrieve the specified serial device.
        device = AD2(SerialDevice(interface=SERIAL_DEVICE))

        # Set up an event handler and open the device
        device.on_message += handle_message

        # Override the default SerialDevice baudrate since we're using a USB device
        # over serial in this example.
        with device.open(baudrate=BAUDRATE):
            while True:
                time.sleep(1)

    except Exception, ex:
        print 'Exception:', ex

def handle_message(sender, *args, **kwargs):
    """
    Handles message events from the AD2.
    """
    msg = kwargs['message']

    print sender, msg.raw

if __name__ == '__main__':
    main()