A snipped of imagenode.py

imagenode.py

#imagenode.py snippet
#  (all the imports, logging setup hidden for now)
settings = Settings()  # get settings for node cameras, ROIs, GPIO
node = ImageNode(settings)  # start ZMQ, cameras and other sensors
# forever event loop
while True:
    node.get_sensor_data()  # grab camera images and other sensor data
    node.process_sensor_data()  # detect motion, etc.
    while len(node.msg_q) > 0:
        try:
            with Patience(settings.patience):  # wait for hub response
                text, image = node.msg_q.popleft()
                hub_reply = node.send_frame(text, image)
        except Patience.Timeout:  # except no timely response from hub
             hub_reply = node.fix_comm_link()
        node.process_hub_reply(hub_reply)