GTDATA

Formerly / also known as MMDVM-TNC

(May need to recreate this page with a better URL if G4KLX doesn’t agree with / begin using the name GTDATA.)

Kind of a game plan, in stages

• Article to explain why it’s different from previous data

  • 9600 lowest speed

  • Robust waveform derived from DMR

  • IL2P FEC

  • List of usable modes

    • 9600

    • (List faster speeds)

  • Can create a GTDATA repeater

  • Compatible implementions

    • NinoTNC, including derivates such as SMT NinoTNC and Matchbox APRS

    • IP400 project to do something with GTDATA

• Testing in N8GNJ / Zero Retries Labs

  • Make sure I have a second ZUMRadio MMDVM-Pi; if not, get one on order.

  • Fabricate a test setup of two radios with flat audio connections

    • Radio with dummy load

    • Custom cable - 6-pin MiniDIN to MMDVM-Pi cable harness

      • Diagram this so others can easily replicate

    • MMDVM-Pi with Raspberry Pi 3B+

    • Optimize signal levels

  • Do some actual radio-to-radio testing of GTDATA

    • Do some real world benchmarks using big file transfers

    • Benchmark against VARA FM

      • Use same radios

    • Set up a repeater for GTDATA using MMDVM-Pi

      • Special configuration instructions?

      • Probably need another MMDVM-Pi

      • Build per xxxx’s build instructions

      • Test direct versus repeater throughput

      • Try to do more real world repeater testing; put up repeater at a temporary high point and radios with real antennas

        • Operating at power - 25 or 50 watts

    • Set up Software Defined Receiver so the test radio traffic can be easily monitored.

• Set up dedicated external access to N8GNJ / Zero Retries Labs “Test LAN”

  • Starlink Mini (capped at 500 kbps)

  • 44Net VPN for static IPv4 addresses that can be accessed from the Internet

  • Put the two MMDVM-Pi Raspberry Pi 3B+ on this LAN

  • Potentially allow G4KLX to shell into the RPis to observe, test, and potentially upload new versions.

  • externally accessible

• Develop use cases

  • File flood

  • File transfers

• Set up a “road show capable” demo system that can be taken to large conferences such as Pacificon

  • Use less expensive (surplus commercial?) radios

• Promote!

  • Articles in Zero Retries

  • YouTube videos

Questions / TBDs:

• Web page needed

  • Dedicated GTDATA.org (?) web page?

  • GTDATA sub-page on MMDVM.com?

• Need to understand if G4KLX followed through with using elements of G3RUH’s flavor of 9600. If so, what improvement does that make?

• Create a “GTDATA” “organization” to promote compatible implementations such as was done with NinoTNC?