IP Address
The destination IP address is 0xFF FF FF FF and in broadcast form.
The default source IP address is 192.168.1.201. Taking“Internet Protocol (20 bytes)” as an example, it is described as follows:
3.2.2 GPS Data Packet - UDP Data
Figure 3.3 GPS Data Ethernet Header Internet Protocol Illustration
Every second, one UDP data will be triggered by one GPS PPS. UDP data has 512 bytes, and the port is 10110. In a locked state, the
GPS packet outputs per second continuously.
Table 3.6 GPS Data Packet-UDP Data
Definition
GPS UDP data: 512 bytes
GPS Time Data
18 bytes
GPRMC Data
77 bytes
ASCII code, valid till 2 bytes after ‘*’
Filled with 411 0xDF
From GPRMC information, ASCII code, A=valid, V=invalid
1=locked, 0=unlocked
Reserved meaningless data
Reserved Data
411 bytes
Location valid or not
1 byte
Flag of PPS lock
1 byte
Reserved Data
4 bytes
Header
Date
Time
μs Time
2 bytes
6 bytes
6 bytes
4 bytes
0xFFEE, 0xFF
fi
rst
Year month and day in order (2 bytes each), lower byte
fi
rst, ASCII code
Second minute and hour in order (2 bytes each), lower byte
fi
rst, ASCII code
Unit is μs, lower byte
fi
rst
- 2 0 -
