#!/bin/bash
# ".txt" extension was added to avoid possible security issues with downloading scripts. 
# Remove it before using.
$ Run script with sh ./Sample-Test-Script-for-Los-Angeles.sh or by script name directly after 
# setting it to executable. 
# Simple script to grab signal level and SNR data from Hauppauge winTV dualHD for multiple stations
# Each reading is saved in a time stamped file for additional processing by a Python program to 
# consolidate data into a csv file. Time stamp can be used to find location by logging GPS 
# coordinates and time using a smartphone GPS app to save waypoints or track location. 
# A dvb_channel.conf file created by dvbv5-scan is required. You can enter a stream name from the 
# file (must match exactly including trailing spaces) or just enter the RF channel 
# frequency matching a frequency in the dvb_channel.conf file. 
# Created by dlung@transmitter.com

# Tune and grab tuner data then exit
# Get date, time and time zone from system
DT=$( date +'%Y%m%d.%H%M%S.%Z')
# Set time in seconds for readings - default 4 seconds, increase if readings missed (slow tuner response)
RT=4
# Duplicate and edit the four lines below here to add additional stations
echo "Begin readings for KPXN"
(dvbsnoop -s signal 2>&1 | tee $DT.kpxn-snr.txt) &
(dvbv5-zap -I zap -c dvb_channel.conf "ION" -m -t $RT 2>&1 | tee $DT.kpxn-dBm.txt)  
echo "Readings for KPXN"
sleep $RT
kill -s kill $(ps aux | grep '[d]vbsnoop' | awk '{print $2}')
echo -e "\n End KPXN readings"

echo "Begin readings for KVEA"
(dvbsnoop -s signal 2>&1 | tee $DT.kvea-snr.txt) &
(dvbv5-zap -I zap -c dvb_channel.conf "KVEA" -m -t $RT 2>&1 | tee $DT.kvea-dBm.txt)  
echo "Readings for KVEA"
sleep $RT
kill -s kill $(ps aux | grep '[d]vbsnoop' | awk '{print $2}')
echo -e "\n End KVEA25 readings"

echo "Begin readings for KCET"
(dvbsnoop -s signal 2>&1 | tee $DT.kcet-snr.txt) &
(dvbv5-zap -I zap -c dvb_channel.conf "KCET HD" -m -t $RT 2>&1 | tee $DT.kcet-dBm.txt)  
echo "Readings for KCET"
sleep $RT
kill -s kill $(ps aux | grep '[d]vbsnoop' | awk '{print $2}')
echo -e "\n End KCET readings"

echo "Begin readings for KNBC"
(dvbsnoop -s signal 2>&1 | tee $DT.knbc-snr.txt) &
(dvbv5-zap -I zap -c dvb_channel.conf "NBC4-LA" -m -t $RT 2>&1 | tee $DT.knbc-dBm.txt)  
echo "Readings for KNBC"
sleep $RT
kill -s kill $(ps aux | grep '[d]vbsnoop' | awk '{print $2}')
echo -e "\n End KNBC readings"

# Add additional stations above this line
# echo "Stop"
# Play a tune to let the user know readings are finished (won't work on Raspberry Pi without a speaker)
# paplay /usr/share/sounds/KDE-Sys-App-Message.ogg   # Works for kubuntu
# paplay /usr/share/sounds/Oxygen-Sys-App-Negative.ogg # Works for Arch
exit