| Name | Byte | Definition | Description |
| Start byte | 1 | : | Start symbol of data package |
| Data package ID | 1 | 0~9 | Package ID is repeated from0 to 9 |
| System password | 3 | 000~999 | System password |
| Terminal ID | 4 | 0000~9999 | Terminal ID |
| Position data | 19 |
E000000000~E180000000 N00000000~ N90000000 |
E means east longitude, which is from 000° and 00.0000 minutes to 180° and 00.0000 minutes. N means north latitude, which is from 00° and 00.0000 minutes to 90° and 00.0000 minutes. |
| UTC | 6 | hhmmss | Greenwich Tme (hour, minute, second) |
| Upload time rate | 3 | 001~255(003) | Upload time interval = basic upload time × upload time rate |
| Alarm information | 4 | xxxx | 0 means OK; 1 means alarm Byte 1: aberrance alarm Byte 2: over-speed alarm Byte 3: dangerous area alarm Byte 4: manual alarm |
| Stop byte | 1 | # | Stop symbol of data package |
| Table 2—Take a look at the 42-byte data package format and the following example ready to be saved: :10019999E121263457N311864290742160030000#. | |||