#!/bin/bash

# script to auto decode packet using rtl_fm and Direwolf

sudo modprobe snd-aloop

sudo systemctl stop openwebrx

sudo systemctl stop rtl_tcp

pkill -o chromium &>/dev/null

sudo killall -9 rtl_fm &>/dev/null

sudo killall -9 direwolf &>/dev/null

sudo killall -9 aplay &>/dev/null

sudo killall -9 qsstv &>/dev/null

sudo killall -9 rtl_tcp &>/dev/null

sudo killall -9 java &>/dev/null

sudo killall -9 CubicSDR &>/dev/null

echo

echo "Choose the number for the packet decoding option:"
echo
echo "1. APRS US 2m (144390 kHz)"
echo "2. CubeSatSim (434900 kHz)"
echo "3. APRS European 2m (144800 kHz)"
echo "4. APRS Australian 2m (145175 kHz)"
echo "5. APRS on another frequency"
echo "6. APRS on ISS (145825 kHz)"
echo "7. Serenity CubeSat 4800 bps (437.1 MHz)"
echo "8. Test Serenity CubeSat decoding with WAV file"
echo

read -r choice

if [ "$choice" = "1" ]; then

  frequency=144390000

elif [ "$choice" = "2" ]; then

  frequency=434900000

elif [ "$choice" = "3" ]; then

  frequency=144800000

elif [ "$choice" = "4" ]; then

  frequency=145175000

elif [ "$choice" = "5" ]; then

  echo

  echo "Enter the frequency in kiloHertz"

  echo

  read -r frequency

  frequency=$frequency"000"

  #echo $frequency

elif [ "$choice" = "6" ]; then

  frequency=145825000

elif [ "$choice" = "7" ]; then

  frequency=437100000

#elif [ "$choice" = "6" ]; then
else

  echo "A recorded WAV file will play and you should see some packets decoded"

  echo 
 
  value=`aplay -l | grep "Loopback"`
  echo "$value" > /dev/null
  set -- $value

#  aplay -D hw:0,0 ~/Recordings/437.098_2021-08-28_10-41-34.wav &
#  aplay -D hw:3,0,0 ~/Recordings/437.098_2021-08-28_10-41-34.wav &
#  aplay -D hw:0,0 WAV/SDRSharp_20210830_200034Z_437097377Hz_AF.wav &
#  aplay -D hw:${2:0:1},0,0 WAV/SDRSharp_20210830_200034Z_437097377Hz_AF.wav &
  aplay -D hw:0,0 WAV/beacon_test_2.wav &
  aplay -D hw:${2:0:1},0,0 WAV/beacon_test_2.wav &

  timeout 30 direwolf -c direwolf/direwolf-4800.conf -r 48000 -t 0
  
  echo
  
  echo "Test complete.  This window will close in 10 seconds."
  
  sleep 5
  
  exit

fi

echo

echo "Note that the 'Tuned to' frequency will be different from the chosen frequency due to the way SDRs work."

echo

if [ "$choice" = "7" ] || [ "$choice" = "8" ]; then

  echo -e "Auto decoding AX.25 packets on $frequency Hz"

  direwolf -r 48000 -c direwolf/direwolf-4800.conf -t 0 &

else

  echo -e "Auto decoding APRS packets on $frequency Hz"

  direwolf -r 48000 -c direwolf/direwolf.conf -t 0 &

fi

sleep 5

value=`aplay -l | grep "Loopback"`
echo "$value" > /dev/null
set -- $value

#rtl_fm -M fm -f 144.39M -s 48k | aplay -D hw:${2:0:1},0,0 -r 48000 -t raw -f S16_LE -c 1
rtl_fm -M fm -f $frequency -s 48k | tee >(aplay -D hw:${2:0:1},0,0 -r 48000 -t raw -f S16_LE -c 1) | aplay -D hw:0,0 -r 48000 -t raw -f S16_LE -c 1

sleep 5