cambrionix.py

import serial, time

SERIALPORT = '/dev/tty.usbserial-DN001P7U'
BAUDRATE = 115200

serial_con = serial.Serial(SERIALPORT, BAUDRATE)

serial_con.bytesize = serial.EIGHTBITS
serial_con.parity = serial.PARITY_NONE
serial_con.stopbits = serial.STOPBITS_ONE
#ser.timeout = 2
serial_con.xonxoff = False   # Software flow control
serial_con.rtscts = False    # Hardware flow control
serial_con.dsrdtr = False    # Hardware flow control
serial_con.writeTimeout = 0

# Create output buffers
output = []
states = []
old_states = []

# Open if it isn't already
if serial_con.isOpen():

    try:
        # Flush input buffer, discarding all its contents
        serial_con.flushInput()
        # Flush output buffer, aborting current output
        serial_con.flushOutput()
    
        # Write a command
        serial_con.write('state\r\n')

        # Turn into list
        for port in range(0,16):
            output.append(serial_con.readline())
    
        for element in output:
            print element

        states = []
        # Find the third element of the each state
        for element in output:
            tmp = element.split()
            states.append(tmp[2])

        # If any states are 'R', device rebooted, send 'cff'
        for state in states:
            if state = 'R':
                print 'device rebooted, clearing output...'
                serial_con.write('state\r\n')

        for port in range(len(states)):
            if old_states[port] is not states[port]:
                # There's a difference!
                print output[port]

        # Update old states
        old_states = states

    # Actual code is done, clean things up and end program
    except Exception, e:
        print 'error communicating...: ' + str(e)

    # Close the serial port whether the except was triggerd or not
    finally:
        serial_con.close()
else:
    print 'cannot open serial port'