def __init__(self, aprs_information=None, context=None):
gr.hier_block2.__init__(
self,
self.__class__.__name__,
gr.io_signature(1, 1, gr.sizeof_float * 1),
gr.io_signature(1, 1, gr.sizeof_float * 1),
)
if aprs_information is not None:
self.__information = aprs_information
else:
self.__information = APRSInformation()
def receive(line):
# %r here provides robustness against arbitrary bytes.
log.msg(u'APRS: %r' % (line, ))
message = parse_tnc2(line, time.time())
log.msg(u' -> %s' % (message, ))
self.__information.receive(message)
self.__mm_demod = MultimonNGDemodulator(
multimon_demod_args=['-A'],
protocol=APRSProcessProtocol(receive),
context=context)
# APRS Voice Alert squelch -- see http://www.aprs.org/VoiceAlert3.html
self.__squelch_mode = None
self.__squelch_block = analog.ctcss_squelch_ff(
rate=int(self.__mm_demod.get_output_type().get_sample_rate()),
freq=100.0, # TODO: should allow the other Voice Alert tones
level=
0.05, # amplitude of tone -- TODO: sometimes opens for noise, needs adjustment
len=0, # use default
ramp=0, # no ramping
gate=False)
self.__router = blocks.multiply_matrix_ff([[0, 0]])
self.set_squelch(u'ctcss')
self.connect(self, self.__mm_demod, self.__squelch_block,
self.__router, self)
self.connect(self.__mm_demod, (self.__router, 1))
def setUp(self):
self.i = APRSInformation()
