ThunderBorg monsterweb.py for diablo

The timeout is controlled by measuring how long it has been since the last message from the web browser. Since the web browser loads images regularly it keeps sending messages while open.

The timeout checking is entirely controlled by this thread:

# Timeout thread
class Watchdog(threading.Thread):
    def __init__(self):
        super(Watchdog, self).__init__()
        self.event = threading.Event()
        self.terminated = False
        self.start()
        self.timestamp = time.time()

    def run(self):
        timedOut = True
        # This method runs in a separate thread
        while not self.terminated:
            # Wait for a network event to be flagged for up to one second
            if timedOut:
                if self.event.wait(1):
                    # Connection
                    print 'Reconnected...'
                    timedOut = False
                    self.event.clear()
            else:
                if self.event.wait(1):
                    self.event.clear()
                else:
                    # Timed out
                    print 'Timed out...'
                    timedOut = True
                    DIABLO.MotorsOff()

You can increase how long it waits for the next message which should reduce the amount of false timeout detections. The downside is that it will also increase how long the robot runs for before it detects a real disconnection.

To increase the delay change the 1 in the if self.event.wait(1): lines for a larger number. The number is how many seconds to wait.