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#!/usr/bin/env python3
# -*- coding: utf-8 -*-
# Copyright 2016 Daniel Estevez <daniel@destevez.net>
#
# This file is part of gr-satellites
#
# SPDX-License-Identifier: GPL-3.0-or-later
#
import struct
from gnuradio import gr
import numpy
import pmt
class beesat_classifier(gr.basic_block):
"""docstring for block beesat_classifier"""
def __init__(self):
gr.basic_block.__init__(
self,
name='beesat_classifier',
in_sig=[],
out_sig=[])
self.message_port_register_in(pmt.intern('in'))
self.set_msg_handler(pmt.intern('in'), self.handle_msg)
self.message_port_register_out(pmt.intern('BEESAT-1'))
self.message_port_register_out(pmt.intern('BEESAT-2'))
self.message_port_register_out(pmt.intern('BEESAT-4'))
self.message_port_register_out(pmt.intern('BEESAT-9'))
self.message_port_register_out(pmt.intern('TECHNOSAT'))
def handle_msg(self, msg_pmt):
msg = pmt.cdr(msg_pmt)
if not pmt.is_u8vector(msg):
print('[ERROR] Received invalid message type. Expected u8vector')
return
packet = bytes(pmt.u8vector_elements(msg))
satellite = None
if len(packet) < 2 + 6 + 2:
# 2byte header, 6byte callsign, 2byte callsign crc
return
callsign = struct.unpack('6s', packet[2:8])[0]
if callsign == 'DP0BEE':
satellite = 'BEESAT-1'
elif callsign == 'DP0BEF':
satellite = 'BEESAT-2'
elif callsign == 'DP0BEH':
satellite = 'BEESAT-4'
elif callsign == 'DP0BEM':
satellite = 'BEESAT-9'
elif callsign == 'DP0TBA':
satellite = 'TECHNOSAT'
if satellite:
self.message_port_pub(pmt.intern(satellite), msg_pmt)
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