def __init__(self, state, meta=None):
"""Instantiate an Atom to the given state.
state -- any object
meta -- meta data to attach"""
super(Atom, self).__init__(meta)
self._state = AtomicReference(state)
DEBUG_NET_COMM = False
DEBUG_ARDUINO_COMM = False
DEBUG_PROCESSOR = True
ARDUINO_WRITE_FREQ = 100 # approximate Hz
# add command line option for port number
define("port", default=8080, help="run on the given port", type=int)
## state variables
# threadsafe queue of received data
data_queue = Queue.Queue(maxsize=0) # maxsize=0 means unlimited capacity
# threadsafe container with the state to tell the arduino to be.
# see ArduinoState for data format
arduino_state = AtomicReference(
ArduinoState(pump_power=0, ledR=0, ledG=0, ledB=0))
# data processor (not threadsafe)
# the processor stores persistent data and figures out how
# to turn data received into an output state
processor = Processor(arduino_state)
# a list of known substrings of serial addresses to try to connect to.
# if None, then skip connecting
serial_addr_subs = ["ACM", "usbmodem", "usbserial"]
# serial connection to arduino, could be None if connection fails
arduino_serial = None
# response handler for web sockets
class WebSocketHandler(tornado.websocket.WebSocketHandler):