NMEA Location Reporting

One of upcoming new features of BrandMeister is NMEA 0183 Location Reporting.

We addressing this feature as open standard for positioning.
No remote triggering
Fully based on existing open standards

This feature makes able to:

Support positioning on MD-380 with custom firmwares
Support positioning on Motorola radios with Bluetooth and without embedded GPS

Specification

One-way messages without confirmation from application
DMR radio should use confirmed or unconfirmed data transmission
DMR radio should use ETSI service application IDs of UDP/IP header compression or IP-based data (see ETSI ETSI TS 102 361-1, 9.3.18)
UDP daragram should use source and destination ports of 10110 that is reserved for NMEA by IANA
Each UDP datagram should contain one or several lines of NMEA messages
Each line should be ended with CRLF sequence
BrandMeister processes only NMEA RMC messages

Example (UDP/IP compressed header)

00000000  00 01 00 00 00 27 7e 27 7e 24 47 50 52 4d 43 2c  --  .....'~'~$GPRMC,
00000010  32 31 30 34 30 34 2c 41 2c 33 39 31 33 2e 30 35  --  210404,A,3913.05
00000020  34 33 2c 4e 2c 30 30 39 30 38 2e 32 34 37 36 2c  --  43,N,00908.2476,
00000030  45 2c 30 30 30 2e 30 2c 30 36 37 2e 32 2c 31 39  --  E,000.0,067.2,19
00000040  30 31 31 36 2c 2c 2c 41 2a 37 32 0d 0a           --  0116,,,A*72..