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91 lines
2.7 KiB
91 lines
2.7 KiB
3 years ago
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#!/bin/bash
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# frame repeater service
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# TODO
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# [X] way to send stderr to log file
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# [ ] way to set freq at start up
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# [ ] way to set Rs and M at start up
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# [ ] way to start as frame repeater or beacon
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TERM_ADDR=0x2
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RS=10000
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DATA_BITS_PER_FRAME=256
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CODE=H_${DATA_BITS_PER_FRAME}_512_4
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TR_SWITCH_GPIO=21
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PIRIP_PATH=/home/pi/pirip
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NAME=frame_repeater
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PIDFILE=/var/run/${NAME}.pid
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LOGFILE=/var/log/${NAME}.log
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PATH=${PIRIP_PATH}/tx:${PIRIP_PATH}/librtlsdr/build_rtlsdr/src:${PATH}
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GAIN="${GAIN:-49}"
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function tx_burst_rpitx {
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num_bursts=$1
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rpitx_fsk /dev/zero --code H_256_512_4 -r ${RS} -s ${RS} --testframes 3 --bursts ${num_bursts} --delay 2000 -g 21 -m 2
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#rpitx_fsk -c
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}
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function start_rx {
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rtl_fsk -g ${GAIN} -f 144490000 - -a 200000 -r ${RS} --code H_256_512_4 --mask ${RS} -L $1 > /dev/null &
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echo $!>${PIDFILE}
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}
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function stop_service {
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echo "service stopping - bye!" 1>&2
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parent=$(cat ${PIDFILE})
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kill ${parent}
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rm ${PIDFILE}
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}
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case "$1" in
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start)
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( rtl_fsk -g 49 -f 144490000 - -a 200000 -r ${RS} --code ${CODE} --mask ${RS} --filter ${TERM_ADDR} -q -b | \
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frame_repeater ${DATA_BITS_PER_FRAME} ${TERM_ADDR} | \
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rpitx_fsk - --code ${CODE} -r ${RS} -s ${RS} -g ${TR_SWITCH_GPIO} --packed -- ) >>${LOGFILE} 2>&1 &
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echo $!>${PIDFILE}
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;;
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start_verbose)
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# run in the foreground and log to stderr instead of a logfile
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rtl_fsk -g 49 -f 144490000 - -a 200000 -r ${RS} --code ${CODE} --mask ${RS} --filter ${TERM_ADDR} -q -b -v | \
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frame_repeater ${DATA_BITS_PER_FRAME} ${TERM_ADDR} | \
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rpitx_fsk - --code ${CODE} -r ${RS} -s ${RS} -g ${TR_SWITCH_GPIO} --packed --
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;;
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start_loopback)
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# Send packets from Pi to RTLSDR on this machine (no filtering of packets or frame repeater)
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set -x
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verbose=1
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start_rx
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sleep 1
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if ! ps -p $(cat ${PIDFILE}); then
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echo "rtl_fsk failed to start!"
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rm ${PIDFILE}
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exit 1
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fi
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tx_burst_rpitx $2
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stop_service
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;;
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stop)
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stop_service
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;;
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restart)
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$0 stop
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$0 start
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;;
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status)
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if [ -e ${PIDFILE} ]; then
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echo ${NAME} is running, pid=`cat ${PIDFILE}`
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else
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echo$ {NAME} is NOT running
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exit 1
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fi
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;;
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*)
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echo "Usage: sudo $0 {start|stop|status|restart}"
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echo ""
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echo "start - Start frame repeater service, logfile is ${LOGFILE}"
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echo "start_verbose - Start frame repeater in foreground, no logfile"
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echo "start_loopback numBursts - Local loopback test, tx/rx numBursts"
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esac
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exit 0
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