Setup bias-tee during install

install.sh

@@ -195,6 +195,15 @@ sudo chmod 777 /var/ramfs
 set -e
 
 success "Install (almost) done!"
+
+read -rp "Do you want to enable bias-tee? (y/N)"
+if [[ $REPLY =~ ^[Yy]$ ]]; then
+    sed -i -e "s/enable_bias_tee/-T/g" "$HOME/.noaa.conf"
+    log_done "Bias-tee is enabled!"
+else
+    sed -i -e "s/enable_bias_tee//g" "$HOME/.noaa.conf"
+fi
+
 echo "
     It's time to configure your ground station
     You'll be asked for your latitude and longitude

receive.sh

@@ -25,7 +25,7 @@ fi
 # $6 = Time to capture
 # $7 = Satellite max elevation
 
-timeout "${6}" /usr/local/bin/rtl_fm -f "${2}"M -s 60k -g 50 -p 55 -E wav -E deemp -F 9 - | /usr/bin/sox -t raw -e signed -c 1 -b 16 -r 60000 - "${NOAA_AUDIO}/audio/${3}.wav" rate 11025
+timeout "${6}" /usr/local/bin/rtl_fm ${BIAS_TEE} -f "${2}"M -s 60k -g 50 -p 55 -E wav -E deemp -F 9 - | /usr/bin/sox -t raw -e signed -c 1 -b 16 -r 60000 - "${NOAA_AUDIO}/audio/${3}.wav" rate 11025
 
 if [ ! -d "{NOAA_OUTPUT}/image/${FOLDER_DATE}" ]; then
 	mkdir -m 775 -p "${NOAA_OUTPUT}/image/${FOLDER_DATE}"

receive_meteor.sh

@@ -29,7 +29,7 @@ fi
 # $7 = Satellite max elevation
 
 log "Starting rtl_fm record" "INFO"
-timeout "${6}" /usr/local/bin/rtl_fm -M raw -f "${2}"M -s 288k -g 48 -p 1 | sox -t raw -r 288k -c 2 -b 16 -e s - -t wav "${METEOR_OUTPUT}/audio/${3}.wav" rate 96k
+timeout "${6}" /usr/local/bin/rtl_fm ${BIAS_TEE} -M raw -f "${2}"M -s 288k -g 48 -p 1 | sox -t raw -r 288k -c 2 -b 16 -e s - -t wav "${METEOR_OUTPUT}/audio/${3}.wav" rate 96k
 
 log "Normalization in progress" "INFO"
 sox "${METEOR_OUTPUT}/audio/${3}.wav" "${METEOR_OUTPUT}/${3}.wav" gain -n

templates/noaa.conf

@@ -8,3 +8,4 @@ SUN_MIN_ELEV=10
 LOG_LEVEL=DEBUG
 LAT=change_latitude
 LON=change_longitude
+BIAS_TEE="enable_bias_tee"