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FreeDV-JATE

FreeDV- Just Another TNC Experiment

My first attempt to learn more about FreeDV and how to create a TNC which gets data from a TCP/IP socket

ToDo

  • ARQ: Stop-And-Wait
  • ARQ: Go-Back-N
  • ARQ: Selective repeating of lost arq frames
  • ARQ: Dynamic number of frames per burst
  • ARQ: Set frames per burst automatically by channel quality
  • SOCKET: Run commands via TCP/IP socket
  • TRX: Control radio via hamlib
  • MODE: Beacon
  • MODE: Broadcast
  • MODE: ARQ AX25
  • MODE: Gear shifting ARQ
  • TNC: CLI GUI for basic settings
  • TNC: Multicore support

Setup

Install FreeDV-Socket-TNC directly to home folder and compile codec2 automatically

sudo apt install portaudio19-dev build-essential cmake
wget https://raw.githubusercontent.com/DJ2LS/FreeDV-Socket-TNC/dev/install_socket_tnc.sh -O ~/install_socket_tnc.sh
chmod +x ~/install_socket_tnc.sh
./install_socket_tnc.sh

Usage main program

./main.py --port 3000 --tx 1 --rx 1 --mode 12

Usage TCP/IP socket client

python3 readfromsocket.py --port 3000 --data "GET:RX_BUFFER:0

Socket Commands

SOCKETTEST

Message for testing purposes which repeats:

SOCKETTEST

"WELL DONE! YOU ARE ABLE TO COMMUNICATE WITH THE TNC"

TRANSMIT ARQ MESSAGE 'HELLO!'

ARQ:HELLO!

SET NEW CALLSIGN

SET:MYCALLSIGN:AA1AA

GET CALLSIGN

GET:MYCALLSIGN

GET CALLSIGN CRC8

GET:MYCALLSIGN_CRC8

GET DX CALLSIGN

GET:DXCALLSIGN

GET ARQ STATE

GET:ARQ_STATE

GET RX BUFFER LENGTH / SIZE

GET:RX_BUFFER_LENGTH

GET RX BUFFER

GET:RX_BUFFER:POSITION

Position = 0 --> Latest Data Position 1-N --> Buffer positions

DELETE RX BUFFER

DEL:RX_BUFFER

Other stuff

Audio sinkhole

Send real audio without external devices or sound cards

sudo modprobe snd-aloop index=1,2 enable=1,1 pcm_substreams=1,1 id=CHAT1,CHAT2

TNC 1

./main.py --port 3000 --tx 1 --rx 1

TNC 2

./main.py --port 3001 --tx 2 --rx 2

Credits

David Rowe and the FreeDV team for developing the modem and libraries FreeDV Codec 2 : https://github.com/drowe67/codec2

This software has been inspired by https://github.com/xssfox/freedv-tnc/