Concox GT800 / Wetrack800 GPS设备数据解码

Question

我正在使用扭曲的 python tcp 服务器

我用

编码了字节串

byte.hex()

data_1 = 78 78 11 01 0 XXXXXXXXXXXXXXX 80 00 21 21 00 00 38 54 0d0a

data_2 = 78 78 11 01 0 XXXXXXXXXXXXXXX 80 00 21 21 00 32 2a c5 0d0a

7878 -> Start bit

11 -> Packet length

01 -> Protocol Number

XX..XX -> IMEI

0d0a -> End bit

我发现在解码这部分8000212100322ac5 时遇到问题，根据他们的文档，它是一个登录数据包，我应该向它发送一些响应。

对于 C# GPS Socket communication (CONCOX)

我需要python中的算法或解码方法

Answer 1

对于 GT-800，我认为这会对您有所帮助

class TcpGpsReceiver(protocol.Protocol):
    """ Event driven callback handler
    """
    def __init__(self):
        """Constructor
        """
        self.imei_no = ''

    def gt_800(self, decoded_data):
        """ Decode the GT-800 Device Data
        """
        if decoded_data[4:6].decode() == '11': # Check if login
            print('Login')
            self.imei_no = decoded_data[9:24]
            data = codecs.decode('7878050100059FF80D0A', encoding='hex', errors='strict')
            self.transport.write(data)
        if decoded_data[4:6].decode().upper() == '0A':
            print('Heat beat received')
            serial_number = hex(int(decoded_data[18:22], 16))[2:]
            data = codecs.decode('78780513{}670E0D0A'.format(get_serial_number(serial_number)),
                                 encoding='hex', errors='strict')
            print(decoded_data[18:22], ' -> serial number')
            self.transport.write(data)
        if decoded_data[4:6].decode() == '22':
            print('Decoding')
            s_no = hex(int(decoded_data[66:70], 16))[2:]
            date_time = decoded_data[8:20]
            latitude = int(decoded_data[23:30], 16) / 1800000
            longitude = int(decoded_data[31:38], 16) / 1800000

            timestamp = datetime(year=int(date_time[0:2], 16),
                                 month=int(date_time[2:4], 16),
                                 day=int(date_time[4:6], 16),
                                 hour=int(date_time[6:8], 16),
                                 minute=int(date_time[8:10], 16),
                                 second=int(date_time[10:12], 16)).strftime('%Y-%m-%d %H:%M:%S')

            location = dict(device_id=self.imei_no.decode(), imei=self.imei_no.decode(), timestamp=timestamp,
                            location=[latitude, longitude],
                            speed=0, course=0, state=0, altitude=0)
            print(location)
            # Code to access location data
            self.imei_no = ''
            self.transport.loseConnection()
        if decoded_data[6:8].decode().upper() == '8A':
            print('Date time requested')
            s_no = hex(int(decoded_data[8:12], 16))[2:]
            now = datetime.now()
            month_hex = '0' + hex(now.month)[2:]
            print(decoded_data[12:16], hex(int(decoded_data[12:16], 16))[2:])
            date_string = '{}{}{}{}{}{}{}{}'.format(hex(int(str(now.year)[2:]))[2:], month_hex, return_date_hex(now.day),
                                                    return_date_hex(now.hour), return_date_hex(now.minute),
                                                    return_date_hex(now.second),
                                                    get_serial_number(s_no), get_serial_number(hex(int(decoded_data[12:16],
                                                                                                       16))[2:]))
            print(date_string)
            data = codecs.decode('78780B8A{}0D0A'.format(date_string), encoding='hex', errors='strict')
            self.transport.write(data)

    def dataReceived(self, data):
        """ Called when data is received across a transport
        """
        decoded_data = codecs.encode(data, encoding='hex', errors='strict')
        print(datetime.now())
        self.gt_800(decoded_data)

def get_serial_number(s_no):
    """Decoding serial No
    """
    if len(s_no) == 1:
        return '000' + s_no
    if len(s_no) == 2:
        return '00' + s_no
    if len(s_no) == 3:
        return '0' + s_no
    if len(s_no) > 4:
        return '0000'
    return s_no

def retrun_date_hex(data):
    print(data)
    if len(str(hex(data)[2:])) == 2:
        return hex(data)[2:]
    else:
        return '0' + hex(data)[2:]

class TcpGpsReceiverFactory(protocol.Factory):
    """ Persistent configuration information, inherits from protocol.Factory
    """
    def buildProtocol(self, addr):
        """ Creates a protocol for each new connection
        """
        return TcpGpsReceiver()

if _name_ == '_main_':
    # Called when the module ran directly
    reactor.listenTCP(10206, TcpGpsReceiverFactory())
    reactor.run()