def testDecode(self):
line = '$ANADS,L3 AIS ID,024829.51,V,0,I,I*39'
message = nmea_messages.DecodeLine(line)
self.assertEqual(
message,
{'alarm': '',
'id': 'L3 AIS ID',
'message': 'ADS',
'pos_src': 'I',
'talker': 'AN',
'time_src': 'I',
'time_sync_method': 0,
'when': datetime.time(2, 48, 29, 510000)})
line = '$BSADS,312670-BS,134839.00,A,3,N,N*22'
message = nmea_messages.DecodeLine(line)
self.assertEqual(
message,
{'alarm': '',
'id': '312670-BS',
'message': 'ADS',
'pos_src': 'N',
'talker': 'BS',
'time_src': 'N',
'time_sync_method': 3,
'when': datetime.time(13, 48, 39)})
def testDecode(self):
line = '$ANALR,000000.00,007,A,V,AIS: UTC Lost*75'
message = nmea_messages.DecodeLine(line)
self.assertEqual(
message,
{'ack_state': False,
'ack_state_raw': 'V',
'condition': True,
'condition_raw': 'A',
'id': '007',
'message': 'ALR',
'talker': 'AN',
'text': 'AIS: UTC Lost',
'time': datetime.time(0, 0)})
line = '$BSALR,134239.00,002,A,V,AIS: Antenna VSWR exceeds limit*45'
message = nmea_messages.DecodeLine(line)
self.assertEqual(
message,
{'ack_state': False,
'ack_state_raw': 'V',
'condition': True,
'condition_raw': 'A',
'id': '002',
'message': 'ALR',
'talker': 'BS',
'text': 'AIS: Antenna VSWR exceeds limit',
'time': datetime.time(13, 42, 39)})
line = '$BSALR,000000.00,006,V,V,AIS: General Failure*0D,rbs1,1206655746.11'
message = nmea_messages.DecodeLine(line)
self.assertEqual(
message,
{'ack_state': False,
'ack_state_raw': 'V',
'condition': False,
'condition_raw': 'V',
'id': '006',
'message': 'ALR',
'talker': 'BS',
'text': 'AIS: General Failure',
'time': datetime.time(0, 0)})
line = '$BSALR,000000.00,051,V,V,AIS: IEC Comm Error*02,rbs1,1206655746.23'
message = nmea_messages.DecodeLine(line)
self.assertEqual(
message,
{'ack_state': False,
'ack_state_raw': 'V',
'condition': False,
'condition_raw': 'V',
'id': '051',
'message': 'ALR',
'talker': 'BS',
'text': 'AIS: IEC Comm Error',
'time': datetime.time(0, 0)})
def testDecode(self):
line = '$INZDA,082015.0007,30,04,2009,,*73'
message = nmea_messages.DecodeLine(line)
self.assertEqual(
message,
{'message': 'ZDA',
'datetime': datetime.datetime(2009, 4, 30, 8, 20, 15, 700),
'talker': 'IN',
'zone_hours': None,
'zone_minutes': None})
def testDecode(self):
line = '$AITXT,01,01,91,FREQ,2087,2088*57'
message = nmea_messages.DecodeLine(line)
self.assertEqual(
message,
{'message': 'TXT',
'sen_num': 1,
'sen_tot': 1,
'seq_num': 91,
'talker': 'AI',
'text': 'FREQ,2087,2088'})
def testDecodeX(self):
line = '$ARFSR,b003669708,000004,X,488,0,,,,,*5B'
message = nmea_messages.DecodeLine(line)
self.assertEqual(
message,
{'chan': 'X',
'id': 'b003669708',
'message': 'FSR',
'slots_recv': 488,
'slots_self': 0,
'time': datetime.time(0, 0, 4)})
def testWithSingleDigitSentenceAndSequence(self):
line = '$AITXT,1,1,007,AIS: UTC clock lost*08'
message = nmea_messages.DecodeLine(line)
self.assertEqual(
message,
{'message': 'TXT',
'sen_num': 1,
'sen_tot': 1,
'seq_num': 7,
'talker': 'AI',
'text': 'AIS: UTC clock lost'})
def testWithCaret(self):
# TODO(schwehr): ^2C should be replaced by a special character in decoding.
line = '$AITXT,01,01,70,Leaving a DSC Receivable Window^2C Chan A*7E'
message = nmea_messages.DecodeLine(line)
self.assertEqual(
message,
{'message': 'TXT',
'sen_num': 1,
'sen_tot': 1,
'seq_num': 70,
'talker': 'AI',
'text': 'Leaving a DSC Receivable Window^2C Chan A'})
def testDecode(self):
line = '$ANABK,,A,8,4,3*15'
message = nmea_messages.DecodeLine(line)
self.assertEqual(
message,
{'ack_type': 3,
'chan': 'A',
'mmsi': None,
'message_id': 8,
'message': 'ABK',
'seq_num': 4,
'talker': 'AN'})
def testDecodeA(self):
line = '$ARFSR,r17MANP1,000001,A,0005,0,0035,,,-128,*66'
message = nmea_messages.DecodeLine(line)
self.assertEqual(
message,
{'chan': 'A',
'crc_fails': 35,
'id': 'r17MANP1',
'message': 'FSR',
'noise_db': -128,
'slots_recv': 5,
'slots_self': 0,
'time': datetime.time(0, 0, 1)})
def testDecode(self):
line = '!UPBBM,1,1,2,0,8,Fv4:3s3QJr<R@GoB64vT80,4*22'
message = nmea_messages.DecodeLine(line)
self.assertEqual(
message,
{'body': 'Fv4:3s3QJr<R@GoB64vT80',
'chan': 0,
'fill_bits': 4,
'message': 'BBM',
'message_id': 8,
'sen_num': 1,
'sen_tot': 1,
'seq_num': 2,
'talker': 'UP'})
def testDecodeFull(self):
line = '$SAFSR,D09MN-SM-GULBS1,000000,B,115,3,5,86,3,-121,124*1F'
message = nmea_messages.DecodeLine(line)
self.assertEqual(
message,
{'chan': 'B',
'crc_fails': 5,
'id': 'D09MN-SM-GULBS1',
'message': 'FSR',
'noise_db': -121,
'slots_above_noise': 124,
'slots_recv': 115,
'slots_reserved': 86,
'slots_reserved_self': 3,
'slots_self': 3,
'time': datetime.time(0, 0)})
def testDecode(self):
line = (
'$GPGGA,174246.00,7119.6369,N,15640.8432,W,1,06,2.39,00011,M,000,M,,'
'*7D')
message = nmea_messages.DecodeLine(line)
self.assertEqual(
message,
{'antenna_height': 11,
'antenna_height_units': 'M',
'geoidal_height': 0,
'geoidal_height_units': 'M',
'gps_quality': 1,
'hdop': 2.39,
'latitude': 71.32728166666666,
'longitude': -156.68072,
'message': 'GGA',
'satellites': 6,
'time': datetime.time(17, 42, 46)})
def put(self, line, line_num=None):
"""Add a line of NMEA or raw text to the queue."""
if line_num is not None:
self.line_num = line_num
else:
self.line_num += 1
line_num = self.line_num
line = line.rstrip()
match = Parse(line)
if not match:
logger.info('No VDM match for line: %d, %s', line_num, line)
msg = {'line_nums': [line_num], 'lines': [line]}
decoded = nmea_messages.DecodeLine(line)
if decoded:
msg['decoded'] = decoded
else:
logger.info('No NMEA match for line: %d, %s', line_num, line)
Queue.Queue.put(self, msg)
return
sentence_total = int(match['sen_tot'])
if sentence_total == 1:
body = match['body']
fill_bits = int(match['fill_bits'])
try:
decoded = ais.decode(body, fill_bits)
except ais.DecodeError as error:
logger.error('Unable to decode message: %s\n %d %s', error,
line_num, line)
return
decoded['md5'] = hashlib.md5(body.encode('utf-8')).hexdigest()
Queue.Queue.put(
self, {
'line_nums': [line_num],
'lines': [line],
'decoded': decoded,
'matches': [match]
})
return
sentence_num = int(match['sen_num'])
group_id = int(match['seq_id'])
if sentence_num == 1:
if group_id in self.groups:
logger.error(
'Incomplete message overwritten by new start. '
'Dropped:\n %s', self.groups[group_id])
self.groups[group_id] = {
'line_nums': [line_num],
'lines': [line],
'matches': [match]
}
return
if group_id not in self.groups:
logger.error(
'Do not have the prior lines in group_id %d. '
'Dropping: \n %s', group_id, line)
return
entry = self.groups[group_id]
if len(entry['lines']) != sentence_num - 1:
logger.error('Out of sequence message. Dropping: %d != %d \n %s',
len(entry['lines']), sentence_num - 1, line)
return
entry['lines'].append(line)
entry['matches'].append(match)
entry['line_nums'].append(line_num)
if sentence_num != sentence_total:
# Nothing more to do in the middle of a sequence of sentences.
return
body = ''.join([match['body'] for match in entry['matches']])
fill_bits = int(entry['matches'][-1]['fill_bits'])
try:
decoded = ais.decode(body, fill_bits)
except ais.DecodeError as error:
logger.error('Unable to decode message: %s\n%s', error, entry)
return
decoded['md5'] = hashlib.md5(body.encode('utf-8')).hexdigest()
entry['decoded'] = decoded
# Found the final message in a group.
Queue.Queue.put(self, entry)
self.groups.pop(group_id)
def testAlmostReal(self): line = '$AAZZZ,JUNK*73' message = nmea_messages.DecodeLine(line) self.assertIsNone(message)
def testEmpty(self): line = '' message = nmea_messages.DecodeLine(line) self.assertIsNone(message)
def testJunk(self):
line = '!@#$($#&^%('
message = nmea_messages.DecodeLine(line)
self.assertIsNone(message)
def put(self, line, line_num=None):
if line_num is not None:
self.line_num = line_num
else:
self.line_num += 1
line = line.rstrip()
match = Parse(line)
if not match:
Queue.Queue.put(self, {
'line_nums': [self.line_num],
'lines': [line],
})
return
time = util.MaybeToNumber(match['time'])
if not match['group']:
msg = {
'line_nums': [self.line_num],
'lines': [line],
'matches': [match],
'times': [time],
}
decoded = DecodeTagSingle(msg)
if decoded:
msg['decoded'] = decoded
else:
logger.info('Unable to decode. Passing without decoded block.')
decoded = nmea_messages.DecodeLine(match['payload'])
if decoded:
msg['decoded'] = decoded
else:
logger.info('No NMEA match for line: %d, %s', line_num,
line)
Queue.Queue.put(self, msg)
return
sentence_num = int(match['sentence_num'])
sentence_total = int(match['sentence_tot'])
group_id = int(match['group_id'])
if sentence_num == 1:
self.groups[group_id] = {
'line_nums': [self.line_num],
'lines': [line],
'matches': [match],
'times': [time],
}
return
if group_id not in self.groups:
logger.error('group_id not in groups: %d', group_id)
return
entry = self.groups[group_id]
entry['line_nums'].append(self.line_num)
entry['lines'].append(line)
entry['matches'].append(match)
entry['times'].append(time)
if sentence_num != sentence_total:
# Found the middle part of a message.
return
# Found the final message in a group.
decoded = DecodeTagMultiple(entry)
if decoded:
entry['decoded'] = decoded
else:
logger.info('Unable to process: %s', entry)
Queue.Queue.put(self, entry)
self.groups.pop(group_id)
