Turn On Gps Pass-Through" Command - Globalstar ST100 User Manual

8545-0194-01 v1.0

4.2.2.35. "Turn On GPS Pass-through" command

This command will turn on the GPS engine and will output the NMEA messages from the GPS engine over the Bluetooth GATT
connection. The NMEA messages conform to NMEA-0183 rev. 3.0. The NMEA messages are in hex format and may need to be
converted to ASCII for readability. The following NMEA messages are output at a one second update rate:
• GPRMC
• GNRMC
• GPGGA
• GNGGA
• GPGSA
• GNGSA
• GPGSV
• GPGLL
• GNGLL
NOTE: Depending on GPS engine configuration and status of the fix, all message types shown here may or may not be present.
For example, the ST100 board is shipped with its GPS engine configured to obtain location using both GPS and GLONASS
constellations. This results in several messages types (for example, GNGGA and GNGSA) to have an "N" as the second
character, indicating that the data within those messages was calculated from "aNy" satellite constellation. Calculation from
GPS only would result in a "P" in that position (for "gPs").
BYTE BITS
0 0 - 7
1 0 - 7
2 0 - 7
3 0 - 7
4-5 0 - 15
Command: AA 06 FD 00 E4 98
Response: AA 05 FD B3 E8
ST100 User Manual v1
TURN ON GPS PASS-THROUGH
PARAMETER
Leader
Length
Command Code
Sub Command Code
CRC
Confidential & Proprietary Information
DESCRIPTION
Always a value of 0xAA
0x06
0xFD
0x00 (Turn On GPS Pass-through)
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