RTL-SDR -> DIREWOLF -> APRS

aprs.sh

#!/bin/bash
# SPDX-License-Identifier: Unlicense
# Author: Derrick Lyndon Pallas <derrick@pallas.us>

for arg in "$@"; do
	shift
	case "$arg" in
		# default = 144.390M
		--iss|--ariss|--aprsat) FREQUENCY=145.825M ;;
		--nz|--newzealand) FREQUENCY=144.575M ;;
		--tw|--taiwan) FREQUENCY=144.640M ;;
		--jp|--japan) FREQUENCY=144.660M ;;
		--za|--southafrica) FREQUENCY=144.800M ;;
		--eu|--europe) FREQUENCY=144.800M ;;
		--ru|--russia) FREQUENCY=144.800M ;;
		--ar|--argentina) FREQUENCY=144.930M ;;
		--uy|--uruguay) FREQUENCY=144.930M ;;
		--au|--australia) FREQUENCY=145.175M ;;
		--br|--brazil) FREQUENCY=145.570M ;;
		*) set -- "$@" "$arg" ;;
	esac
done

sudo true &&
sudo nice -n -5 rtl_fm -p 3 -f ${FREQUENCY:-144.390M} -s 44.1k "$@" |
nice -n 5 direwolf -T '%FT%TZ' -c /proc/self/fd/3 3<<-EOF
	ADEVICE stdin null
	CHANNEL 0
	MYCALL N0CALL-10
	IGSERVER noam.aprs2.net:14580
	IGLOGIN N0CALL-10 12345
	PBEACON SENDTO=IG DELAY=0:30 EVERY=60:00 SYMBOL="igate" OVERLAY=R LAT=37.780000N LONG=122.420000W
	AGWPORT 0
	KISSPORT 0
EOF
#