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.
• WLIPGateway - Wireline 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 encryption:

• ARC4

Supported IP features:

• ICMP/IP4 over dmr (plain)
• TCP/IP4 over dmr (plain)
• 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)
• Voice header and terminator including Link Control (LC) data
• Voice data (HomeBrew/IPSC payload)
• PI header

Some development information can be found in dev folder.

Credits

Thanks to the following projects:

• go-dmr
• MMDVMHost
• Moto.Net
• DMRlink
• sdrtrunk
• SafeNet
• TRBO-NET
• trbo-data-svc

Full readme coming soon...