90 lines
2.6 KiB
Python
Executable File
90 lines
2.6 KiB
Python
Executable File
#!/usr/bin/env python3
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import base64
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import json
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import logging
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from random import randint
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import socket
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from board_config import LoraBoardDraguino
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import RPi.GPIO as GPIO
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logging.basicConfig(level=logging.DEBUG)
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# TODO: Move these to a settings file
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GATEWAY_SEND_ENABLED = False
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GATEWAY_HOST = "router.eu.thethings.network"
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GATEWAY_PORT = 1700
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def log_packet(self, board, packet):
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print("[{}] [receive] freq: {}, crc: {}, signal-noise-ratio: {}, signal strength: {} (packet: {}), {}".format(
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payload['datetime'].isoformat(),
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board.frequency,
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payload.get('crc'),
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payload.get('pkt_snr'),
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payload.get('rssi'),
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payload.get('pkt_rssi'),
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payload['payload'].hex()
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))
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def construct_semtec_udp(board, payload):
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# https://github.com/Lora-net/packet_forwarder/blob/d0226eae6e7b6bbaec6117d0d2372bf17819c438/PROTOCOL.TXT#L99
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frame = bytearray()
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frame.append(2) # Protocol version = 2
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frame.extend([randint(0, 255), randint(0, 255)]) # Random numbers
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frame.extend([
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0x80, 0xFA, 0x5C, 0xFF,
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0xFF, 0x69, 0x33, 0xBB
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]) # TODO: construct from hardware
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data = {
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"rxpk":
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{
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"time": payload['datetime'].isoformat(),
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"freq": board.frequency / 1000 / 1000,
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"stat": 1 if payload['crc'] is True else -1,
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"modu": "LORA",
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"datr": "SF7BW125", # TODO: configurable
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"codr": "4/5",
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"rssi": payload['pkt_rssi'],
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"lsnr": payload['pkt_snr'],
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"size": len(payload['payload']),
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"data": base64.standard_b64encode(payload['payload'])
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.decode("utf-8")
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}
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}
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frame.extend(map(ord, json.dumps(data)))
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return bytes(frame)
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if __name__ == "__main__":
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sock = None
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if GATEWAY_SEND_ENABLED:
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sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM) # UDP
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with LoraBoardDraguino(433300000, 7) as board:
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board.set_mode_rx()
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print("Listening at SF{} on {} MHz".format(
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board.sf,
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board.frequency / 1000000
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))
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while True:
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if GPIO.input(board._pin_dio0) != 1:
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continue
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payload = board.receive_package()
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if GATEWAY_SEND_ENABLED:
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semtec_udp = construct_semtec_udp(board, payload)
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sock.sendto(semtec_udp, (GATEWAY_HOST, GATEWAY_PORT))
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logging.info(semtec_udp)
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log_packet(board, payload)
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