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node-dmr-lib

Motorola MotoTRBO DMR protocols research project.

Supported protocols:

  • ARS (Automatic Registration Service)
  • LRRP (Location Request Response Protocol)
  • TMS (Text Message Service)
  • BMS (IMPRES Battery Management)
  • HomeBrew (HBLink repeater protocol)
  • IPSC (IP Site Connect)
  • XCMP (Extended Control & Management Protocol)
  • XNL (XCMP Network Layer)
  • NMEA over DMR UDT: Short (ETSI specs) and Legacy (Ailunce and TYT radios).

Services:

  • IPSCPeer - IPSC peer node, maintains master connection and provides DMR sending/receiving.
  • DMRIPGateway - DMR to UDP/IP gateway. Connects to the IPSCPeer.
  • DMRServices - ARS/LRRP/BMS service. Connects to the DMRIPGateway.
  • AMBEClient - Client for AMBE server for encoding/decoding voice frames (example)

Supported encodings/checksums:

  • BPTC 196/96
  • CRC 9/16/32
  • Hamming
  • Trellis
  • Golay 20/8/7
  • AMBE (conversion from 72 to 49 bit and vise-versa)
  • Quadratic residue (QR) 16/7/6
  • Reed-Solomon 12/9

Supported IP features:

  • UDP/IP4 over dmr (plain)
  • UDP/IP4 over dmr (DMR Standart header compression)
  • UDP/IP4 over dmr (Advantage header compression)

Supported DMR blocks:

  • DataHeader (Unified, Response, Confirmed, Unconfirmed, Proprietary, ProprietaryCompressed)
  • CSBK (CallAlertACK, CallEmergency, Preamble)
  • Rate 1/2 and 3/4 data
  • DataBlock with CRC32 (encapsulates IP packets)

Some development information can be found in dev folder.

Credits

Thanks to the following projects:

Full readme coming soon...