mirror of
https://github.com/DJ2LS/FreeDATA
synced 2024-05-14 08:04:33 +00:00
116 lines
4 KiB
Python
116 lines
4 KiB
Python
import structlog
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import threading
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import helpers
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import time
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import modem
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import base64
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import ujson as json
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class broadcastHandler:
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"""Terminal Node Controller for FreeDATA"""
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log = structlog.get_logger("BROADCAST")
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def __init__(self, config, event_queue) -> None:
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self.mycallsign = config['STATION']['mycall']
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self.fec_wakeup_callsign = bytes()
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self.longest_duration = 6
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self.wakeup_received = False
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self.broadcast_timeout_reached = False
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self.broadcast_payload_bursts = 1
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self.broadcast_watchdog = threading.Thread(
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target=self.watchdog, name="watchdog thread", daemon=True
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)
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self.broadcast_watchdog.start()
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self.event_queue = event_queue
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def received_fec_wakeup(self, data_in: bytes):
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self.fec_wakeup_callsign = helpers.bytes_to_callsign(bytes(data_in[1:7]))
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self.wakeup_mode = int.from_bytes(bytes(data_in[7:8]), "big")
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bursts = int.from_bytes(bytes(data_in[8:9]), "big")
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self.wakeup_received = True
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modem.RECEIVE_DATAC4 = True
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self.send_data_to_socket_queue(
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freedata="modem-message",
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fec="wakeup",
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mode=self.wakeup_mode,
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bursts=bursts,
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dxcallsign=str(self.fec_wakeup_callsign, "UTF-8")
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)
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self.log.info(
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"[Modem] FRAME WAKEUP RCVD ["
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+ str(self.fec_wakeup_callsign, "UTF-8")
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+ "] ", mode=self.wakeup_mode, bursts=bursts,
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)
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def received_fec(self, data_in: bytes):
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print(self.fec_wakeup_callsign)
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self.send_data_to_socket_queue(
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freedata="modem-message",
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fec="broadcast",
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dxcallsign=str(self.fec_wakeup_callsign, "UTF-8"),
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data=base64.b64encode(data_in[1:]).decode("UTF-8")
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)
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self.log.info("[Modem] FEC DATA RCVD")
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def send_data_to_socket_queue(self, **jsondata):
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"""
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Send information to the UI via JSON and the sock.SOCKET_QUEUE.
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Args:
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Dictionary containing the data to be sent, in the format:
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key=value, for each item. E.g.:
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self.send_data_to_socket_queue(
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freedata="modem-message",
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arq="received",
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status="success",
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uuid=self.transmission_uuid,
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timestamp=timestamp,
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mycallsign=str(self.mycallsign, "UTF-8"),
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dxcallsign=str(Station.dxcallsign, "UTF-8"),
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dxgrid=str(Station.dxgrid, "UTF-8"),
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data=base64_data,
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)
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"""
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# add mycallsign and dxcallsign to network message if they not exist
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# and make sure we are not overwrite them if they exist
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try:
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if "mycallsign" not in jsondata:
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jsondata["mycallsign"] = str(self.mycallsign, "UTF-8")
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except Exception as e:
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self.log.debug("[Modem] error adding callsigns to network message", e=e)
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# run json dumps
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json_data_out = json.dumps(jsondata)
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self.log.debug("[Modem] send_data_to_socket_queue:", jsondata=json_data_out)
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# finally push data to our network queue
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self.event_queue.put(json_data_out)
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def watchdog(self):
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while 1:
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if self.wakeup_received:
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timeout = time.time() + (self.longest_duration * self.broadcast_payload_bursts) + 2
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while time.time() < timeout:
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threading.Event().wait(0.01)
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self.broadcast_timeout_reached = True
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self.log.info(
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"[Modem] closing broadcast slot ["
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+ str(self.fec_wakeup_callsign, "UTF-8")
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+ "] ", mode=self.wakeup_mode, bursts=self.broadcast_payload_bursts,
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)
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# TODO We need a dynamic way of modifying this
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modem.RECEIVE_DATAC4 = False
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self.fec_wakeup_callsign = bytes()
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self.wakeup_received = False
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else:
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threading.Event().wait(0.01)
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