and 
NMEA HDT message
Popular NMEA messages
Heading from True North (HDT)
| Message | NMEA-Standard-HDT Heading from True North |
| Comment | The heading computation in this message is computed from the moving baseline vector, which requires a two-antenna system. |
| Information | Number of fields: 5 |
| Structure | $GPHDT,heading,reference*cs\r\n |
| Example | $GPHDT,123.456,T*00\r\n |
Payload
| Field | Name | Format | Unit | Example | Description |
|---|---|---|---|---|---|
| 0 | $GPHDT | string | - | $GPHDT | HDT Message ID (xx = current Talker ID) |
| 1 | heading | ddd.ddd | degrees | 123.456 | Actual heading in degrees, from 000.000 to 359.999. |
| 2 | reference | character | - | T | T: Indicates heading relative to True North |
| 3 | cs | hexadecimal | - | *00 | The checksum data, always begins with * |
| 4 | CRLF | character | - | - | Carriage return and line feed |
Based on NMEA documentation provided by u-blox.
Learn more about NMEA protocol:
