freqwatch's Introduction

Freqwatch v0.2

Joshua Davis (freqwatch -!- edgetera.net)

UPDATE:

This is newer and does more: http://www.gammarf.io - check it out.
Or check out my SensorScape repo

Updates in v0.2

Client ID goes to database
Experimental GPS (not finished yet, need help testing)

Introduction

Explore vast regions of the RF spectrum
Log radio activity to a mysql database for trend analysis
Delegate scanners to find radio traffic and log it
Delegate monitors to store interesting data in the database

Usage

Install (see the INSTALL file)
Use the 'blacklist' file to prevent frequency ranges from showing up in your database / output
Configure some sticks as scanners using freqwatch.conf. Scanners scan frequency ranges and log signals above a defined threshold to the database, in the 'freqs' table.
Configure other sticks as monitors by using the modified rtl_fm included. Use regular rtl_fm options to specify frequency ranges (several to scan different frequencies), etc. The output will be logged to the database 'intercepts' table.
See the freqwatch.conf file for examples
Use the intercept.py file in the rtl_fm_new directory to pull data from the monitor database. The monitor system still has problems (inserts blanks in the output...)

Useful Commands

Get rtl_fm_new data to listen to / decode: mysql --binary-mode -e "select group_concat(data separator '') from intercepts order by date, time;" -A -B -r -L -N freqwatch -u freqwatch -p > output
Or better yet, use intercept.py in the rtl_fm directory
Intercept WBFM: rtl_fm -f 95.7e6 -s 170k -A fast -r 32k -l 0 | play -r 32k -t raw -e s -b 16 -c 1 -V1 - (they suggest using -E deemp, but that doesn't work for me)
Listen to WBFM on the command line: cat file | play -t raw -r 32k -e signed-integer -b 16 -c 1 -V1 -

Security Note

You should run freqwatch in a controlled environment (e.g. with the web and database servers on localhost, and a firewall blocking the relevant ports from outsiders.)

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