From 05523544c9f0d2f593873ed544864917ebfae92b Mon Sep 17 00:00:00 2001 From: Mike Hojnowski Date: Sun, 14 Jul 2024 22:36:12 -0400 Subject: [PATCH] Add eight-way startup script --- start_eight_4fsk.sh | 177 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 177 insertions(+) create mode 100755 start_eight_4fsk.sh diff --git a/start_eight_4fsk.sh b/start_eight_4fsk.sh new file mode 100755 index 0000000..330995a --- /dev/null +++ b/start_eight_4fsk.sh @@ -0,0 +1,177 @@ +#!/usr/bin/env bash +# +# Horus Binary *Eight-way* Decoder Script +# Intended for situations with up to eight payloads in the air, spaced 5 kHz apart. +# NOTE - Ensure your horus_demod build is from newer than ~5th April 2024, else this +# will not work correctly! +# +# Note: Don't try this with DFM17's. They have significant frequency drift and may +# interfere with adjoining payloads. +# +# The *centre* frequency of the SDR Receiver, in Hz. +# Trackers should be programmed at 5khz intervals, starting 2.5khz above, and below the center +# frequency. +# In this example we set the center frequency to 432.622.500. Tracker frequencies should +# be programmed at 432.605.000 - 432.640.000 at 5khz intervals + +# Center Frequency +RXFREQ=432622500 + + +# Change directory to the horusdemodlib directory. +# If running as a different user, you will need to change this line +cd /home/pi/horusdemodlib/ + +# Where to find the first signal - in this case at 432.605 MHz, so -17500 Hz below the centre. +MFSK1_SIGNAL=-17500 + +# Where to find the second signal - in this case at 432.610 MHz, so -12500 Hz below the centre. +MFSK2_SIGNAL=-12500 + +# Where to find the third signal - in this case at 432.615 MHz, so -7500 Hz below the centre. +MFSK3_SIGNAL=-7500 + +# Where to find the fourth signal - in this case at 432.620 MHz, so -2500 Hz below the centre. +MFSK4_SIGNAL=-2500 + +# Where to find the fifth signal - in this case at 432.625 MHz, so 2500 Hz above the centre. +MFSK5_SIGNAL=2500 + +# Where to find the sixth signal - in this case at 432.630 MHz, so 7500 Hz above the centre. +MFSK6_SIGNAL=7500 + +# Where to find the seventh signal - in this case at 432.635 MHz, so 12500 Hz above the centre. +MFSK7_SIGNAL=12500 + +# Where to find the eighth signal - in this case at 432.640 MHz, so 17500 Hz above the centre. +MFSK8_SIGNAL=17500 + +# Frequency estimator bandwidth. The wider the bandwidth, the more drift and frequency error the modem can tolerate, +# but the higher the chance that the modem will lock on to a strong spurious signal. +RXBANDWIDTH=5000 + +# RTLSDR Device Selection +# If you want to use a specific RTLSDR, you can change this setting to match the +# device identifier of your SDR (use rtl_test to get a list) +SDR_DEVICE=0 + +# Receiver Gain. Set this to 0 to use automatic gain control, otherwise if running a +# preamplifier, you may want to experiment with different gain settings to optimize +# your receiver setup. +# You can find what gain range is valid for your RTLSDR by running: rtl_test +GAIN=0 + +# Bias Tee Enable (1) or Disable (0) +# NOTE: This uses the -T bias-tee option which is only available on recent versions +# of rtl-sdr. Check if your version has this option by running rtl_fm --help and looking +# for it in the option list. +# If not, you may need to uninstall that version, and then compile from source: https://github.com/osmocom/rtl-sdr +BIAS=0 + +# Receiver PPM offset +PPM=0 + +# Check that the horus_demod decoder has been compiled. +DECODER=./build/src/horus_demod +if [ -f "$DECODER" ]; then + echo "Found horus_demod." +else + echo "ERROR - $DECODER does not exist - have you compiled it yet?" + exit 1 +fi + +# Check that bc is available on the system path. +if echo "1+1" | bc > /dev/null; then + echo "Found bc." +else + echo "ERROR - Cannot find bc - Did you install it?" + exit 1 +fi + +# Use a local venv if it exists +VENV_DIR=venv +if [ -d "$VENV_DIR" ]; then + echo "Entering venv." + source $VENV_DIR/bin/activate +fi + + +# Calculate the frequency estimator limits for each decoder +MFSK1_LOWER=$(echo "$MFSK1_SIGNAL - $RXBANDWIDTH/2" | bc) +MFSK1_UPPER=$(echo "$MFSK1_SIGNAL + $RXBANDWIDTH/2" | bc) +MFSK1_CENTRE=$(echo "$RXFREQ + $MFSK1_SIGNAL" | bc) + +MFSK2_LOWER=$(echo "$MFSK2_SIGNAL - $RXBANDWIDTH/2" | bc) +MFSK2_UPPER=$(echo "$MFSK2_SIGNAL + $RXBANDWIDTH/2" | bc) +MFSK2_CENTRE=$(echo "$RXFREQ + $MFSK2_SIGNAL" | bc) + +MFSK3_LOWER=$(echo "$MFSK3_SIGNAL - $RXBANDWIDTH/2" | bc) +MFSK3_UPPER=$(echo "$MFSK3_SIGNAL + $RXBANDWIDTH/2" | bc) +MFSK3_CENTRE=$(echo "$RXFREQ + $MFSK3_SIGNAL" | bc) + +MFSK4_LOWER=$(echo "$MFSK4_SIGNAL - $RXBANDWIDTH/2" | bc) +MFSK4_UPPER=$(echo "$MFSK4_SIGNAL + $RXBANDWIDTH/2" | bc) +MFSK4_CENTRE=$(echo "$RXFREQ + $MFSK4_SIGNAL" | bc) + +MFSK5_LOWER=$(echo "$MFSK5_SIGNAL - $RXBANDWIDTH/2" | bc) +MFSK5_UPPER=$(echo "$MFSK5_SIGNAL + $RXBANDWIDTH/2" | bc) +MFSK5_CENTRE=$(echo "$RXFREQ + $MFSK5_SIGNAL" | bc) + +MFSK6_LOWER=$(echo "$MFSK6_SIGNAL - $RXBANDWIDTH/2" | bc) +MFSK6_UPPER=$(echo "$MFSK6_SIGNAL + $RXBANDWIDTH/2" | bc) +MFSK6_CENTRE=$(echo "$RXFREQ + $MFSK6_SIGNAL" | bc) + +MFSK7_LOWER=$(echo "$MFSK7_SIGNAL - $RXBANDWIDTH/2" | bc) +MFSK7_UPPER=$(echo "$MFSK7_SIGNAL + $RXBANDWIDTH/2" | bc) +MFSK7_CENTRE=$(echo "$RXFREQ + $MFSK6_SIGNAL" | bc) + +MFSK8_LOWER=$(echo "$MFSK8_SIGNAL - $RXBANDWIDTH/2" | bc) +MFSK8_UPPER=$(echo "$MFSK8_SIGNAL + $RXBANDWIDTH/2" | bc) +MFSK8_CENTRE=$(echo "$RXFREQ + $MFSK6_SIGNAL" | bc) + +echo "Using SDR Centre Frequency: $RXFREQ Hz." +echo "Using MFSK1 estimation range: $MFSK1_LOWER - $MFSK1_UPPER Hz" +echo "Using MFSK2 estimation range: $MFSK2_LOWER - $MFSK2_UPPER Hz" +echo "Using MFSK3 estimation range: $MFSK3_LOWER - $MFSK3_UPPER Hz" +echo "Using MFSK4 estimation range: $MFSK4_LOWER - $MFSK4_UPPER Hz" +echo "Using MFSK5 estimation range: $MFSK5_LOWER - $MFSK5_UPPER Hz" +echo "Using MFSK6 estimation range: $MFSK6_LOWER - $MFSK6_UPPER Hz" +echo "Using MFSK7 estimation range: $MFSK7_LOWER - $MFSK7_UPPER Hz" +echo "Using MFSK8 estimation range: $MFSK8_LOWER - $MFSK8_UPPER Hz" + +BIAS_SETTING="" + +if [ "$BIAS" = "1" ]; then + echo "Enabling Bias Tee." + BIAS_SETTING=" -T" +fi + +GAIN_SETTING="" +if [ "$GAIN" = "0" ]; then + echo "Using AGC." + GAIN_SETTING="" +else + echo "Using Manual Gain" + GAIN_SETTING=" -g $GAIN" +fi + +STATS_SETTING="" + +if [ "$STATS_OUTPUT" = "1" ]; then + echo "Enabling Modem Statistics." + STATS_SETTING=" --stats=100" +fi + +# Start the receive chain. +# Note that we now pass in the SDR centre frequency ($RXFREQ) and 'target' signal frequency ($MFSK1_CENTRE) +# to enable providing additional metadata to SondeHub +rtl_fm -M raw -F9 -d $SDR_DEVICE -s 48000 -p $PPM $GAIN_SETTING$BIAS_SETTING -f $RXFREQ \ + | tee >($DECODER -q --stats=5 -g -m binary --fsk_lower=$MFSK1_LOWER --fsk_upper=$MFSK1_UPPER - - | python -m horusdemodlib.uploader --freq_hz $RXFREQ --freq_target_hz $MFSK1_CENTRE ) \ + | tee >($DECODER -q --stats=5 -g -m binary --fsk_lower=$MFSK2_LOWER --fsk_upper=$MFSK2_UPPER - - | python -m horusdemodlib.uploader --freq_hz $RXFREQ --freq_target_hz $MFSK2_CENTRE ) \ + | tee >($DECODER -q --stats=5 -g -m binary --fsk_lower=$MFSK3_LOWER --fsk_upper=$MFSK3_UPPER - - | python -m horusdemodlib.uploader --freq_hz $RXFREQ --freq_target_hz $MFSK3_CENTRE ) \ + | tee >($DECODER -q --stats=5 -g -m binary --fsk_lower=$MFSK4_LOWER --fsk_upper=$MFSK4_UPPER - - | python -m horusdemodlib.uploader --freq_hz $RXFREQ --freq_target_hz $MFSK4_CENTRE ) \ + | tee >($DECODER -q --stats=5 -g -m binary --fsk_lower=$MFSK5_LOWER --fsk_upper=$MFSK5_UPPER - - | python -m horusdemodlib.uploader --freq_hz $RXFREQ --freq_target_hz $MFSK5_CENTRE ) \ + | tee >($DECODER -q --stats=5 -g -m binary --fsk_lower=$MFSK6_LOWER --fsk_upper=$MFSK6_UPPER - - | python -m horusdemodlib.uploader --freq_hz $RXFREQ --freq_target_hz $MFSK6_CENTRE ) \ + | tee >($DECODER -q --stats=5 -g -m binary --fsk_lower=$MFSK7_LOWER --fsk_upper=$MFSK7_UPPER - - | python -m horusdemodlib.uploader --freq_hz $RXFREQ --freq_target_hz $MFSK7_CENTRE ) \ + >($DECODER -q --stats=5 -g -m binary --fsk_lower=$MFSK8_LOWER --fsk_upper=$MFSK8_UPPER - - | python -m horusdemodlib.uploader --freq_hz $RXFREQ --freq_target_hz $MFSK8_CENTRE ) > /dev/null +