Description from https://github.com/tobadia/petGPS/tree/master/resources
"""
-from datetime import datetime
+from datetime import datetime, timezone
from inspect import isclass
from logging import getLogger
from struct import pack, unpack
-__all__ = ("handle_packet", "make_response")
+__all__ = (
+ "handle_packet",
+ "make_object",
+ "make_response",
+ "set_config",
+ "UNKNOWN",
+ "LOGIN",
+ "SUPERVISION",
+ "HEARTBEAT",
+ "GPS_POSITIONING",
+ "GPS_OFFLINE_POSITIONING",
+ "STATUS",
+ "HIBERNATION",
+ "RESET",
+ "WHITELIST_TOTAL",
+ "WIFI_OFFLINE_POSITIONING",
+ "TIME",
+ "MOM_PHONE",
+ "STOP_ALARM",
+ "SETUP",
+ "SYNCHRONOUS_WHITELIST",
+ "RESTORE_PASSWORD",
+ "WIFI_POSITIONING",
+ "MANUAL_POSITIONING",
+ "BATTERY_CHARGE",
+ "CHARGER_CONNECTED",
+ "CHARGER_DISCONNECTED",
+ "VIBRATION_RECEIVED",
+ "POSITION_UPLOAD_INTERVAL",
+)
log = getLogger("gps303")
class _GT06pkt:
PROTO: int
+ CONFIG = None
def __init__(self, *args, **kwargs):
assert len(args) == 0
@classmethod
def from_packet(cls, length, proto, payload):
- adjust = 2 if proto == STATUS.PROTO else 4 # Weird special case
- if length > 1 and len(payload) + adjust != length:
- log.warning(
- "length is %d but payload length is %d", length, len(payload)
- )
- return cls(length=length, proto=proto, payload=payload)
+ return cls(proto=proto, payload=payload, length=length)
def response(self, *args):
if len(args) == 0:
class _GPS_POSITIONING(_GT06pkt):
-
@classmethod
def from_packet(cls, length, proto, payload):
self = super().from_packet(length, proto, payload)
self.dtime = payload[:6]
- # TODO parse the rest
+ if self.dtime == b"\0\0\0\0\0\0":
+ self.devtime = None
+ else:
+ self.devtime = datetime(
+ *unpack("BBBBBB", self.dtime), tzinfo=timezone.utc
+ )
+ self.gps_data_length = payload[6] >> 4
+ self.gps_nb_sat = payload[6] & 0x0F
+ lat, lon, speed, flags = unpack("!IIBH", payload[7:18])
+ self.gps_is_valid = bool(flags & 0b0001000000000000) # bit 3
+ flip_lon = bool(flags & 0b0000100000000000) # bit 4
+ flip_lat = not bool(flags & 0b0000010000000000) # bit 5
+ self.heading = flags & 0b0000001111111111 # bits 6 - last
+ self.latitude = lat / (30000 * 60) * (-1 if flip_lat else 1)
+ self.longitude = lon / (30000 * 60) * (-2 if flip_lon else 1)
+ self.speed = speed
+ self.flags = flags
return self
def response(self):
PROTO = 0x16
-class WIFI_OFFLINE_POSITIONING(_GT06pkt):
+class _WIFI_POSITIONING(_GT06pkt):
+ @classmethod
+ def from_packet(cls, length, proto, payload):
+ self = super().from_packet(length, proto, payload)
+ self.dtime = payload[:6]
+ if self.dtime == b"\0\0\0\0\0\0":
+ self.devtime = None
+ else:
+ self.devtime = datetime.strptime(
+ self.dtime.hex(), "%y%m%d%H%M%S"
+ ).astimezone(tz=timezone.utc)
+ self.wifi_aps = []
+ for i in range(self.length): # length has special meaning here
+ slice = payload[6 + i * 7 : 13 + i * 7]
+ self.wifi_aps.append(
+ (":".join([format(b, "02X") for b in slice[:6]]), -slice[6])
+ )
+ gsm_slice = payload[6 + self.length * 7 :]
+ ncells, self.mcc, self.mnc = unpack("!BHB", gsm_slice[:4])
+ self.gsm_cells = []
+ for i in range(ncells):
+ slice = gsm_slice[4 + i * 5 : 9 + i * 5]
+ locac, cellid, sigstr = unpack(
+ "!HHB", gsm_slice[4 + i * 5 : 9 + i * 5]
+ )
+ self.gsm_cells.append((locac, cellid, -sigstr))
+ return self
+
+
+class WIFI_OFFLINE_POSITIONING(_WIFI_POSITIONING):
PROTO = 0x17
+ def response(self):
+ return super().response(self.dtime)
+
class TIME(_GT06pkt):
PROTO = 0x30
PROTO = 0x67
-class WIFI_POSITIONING(_GT06pkt):
+class WIFI_POSITIONING(_WIFI_POSITIONING):
PROTO = 0x69
+ def response(self):
+ payload = b"" # TODO fill payload
+ return super().response(payload)
+
class MANUAL_POSITIONING(_GT06pkt):
PROTO = 0x80
CLASSES[cls.PROTO] = cls
+def make_object(length, proto, payload):
+ if proto in CLASSES:
+ return CLASSES[proto].from_packet(length, proto, payload)
+ else:
+ return UNKNOWN.from_packet(length, proto, payload)
+
+
def handle_packet(packet, addr, when):
if len(packet) < 6:
- msg = UNKNOWN.from_packet(0, 0, packet)
+ return UNKNOWN.from_packet(0, 0, packet)
else:
xx, length, proto = unpack("!2sBB", packet[:4])
crlf = packet[-2:]
payload = packet[4:-2]
- if xx != b"xx" or crlf != b"\r\n" or proto not in CLASSES:
- msg = UNKNOWN.from_packet(length, proto, packet)
+ adjust = 2 if proto == STATUS.PROTO else 4 # Weird special case
+ if (
+ proto
+ not in (WIFI_POSITIONING.PROTO, WIFI_OFFLINE_POSITIONING.PROTO)
+ and length > 1
+ and len(payload) + adjust != length
+ ):
+ log.warning(
+ "With proto %d length is %d but payload length is %d+%d",
+ proto,
+ length,
+ len(payload),
+ adjust,
+ )
+ if xx != b"xx" or crlf != b"\r\n":
+ return UNKNOWN.from_packet(length, proto, packet) # full packet
else:
- msg = CLASSES[proto].from_packet(length, proto, payload)
- return msg
+ return make_object(length, proto, payload)
+
def make_response(msg):
return msg.response()
+
+
+def set_config(config): # Note that we are setting _class_ attribute
+ _GT06pkt.CONFIG = config
projects / loctrkd.git / blobdiff