Intercept

This looks like a pretty interesting GitHub Project:

Signal Intelligence Platform

A sleek, modern web-based front-end for signal intelligence tools. Unified interface for pager decoding, 433MHz sensors, ADS-B aircraft tracking, satellite monitoring, WiFi reconnaissance, and Bluetooth scanning.

I gave it a try on my main computer and it was pretty easy to install and use.

Installing Intercept

Since the software is being updated every few weeks, see the GitHub page for the latest instructions.

Running Intercept

To start the program, I ran:

source venv/bin/activate && sudo venv/bin/python intercept.py

For convenience, I add this to my alias.

This gives more instructions on how to access the program, and how to stop it:

==================================================
 INTERCEPT // Signal Intelligence
 Pager / 433MHz / Aircraft / Satellite / WiFi / BT
==================================================

Open http://localhost:5050 in your browser

Press Ctrl+C to stop

It also shows other IP addresses where the program can be accessed (which I'm not showing here).

I added more details of what I was able and unable to decode in the discussion (must be logged into the website to see). Add comments if you give it a try!

Discussion

Patrick, VA7FI, 2026/01/05 19:07

I just tried it on my main laptop and I have to admit, it's pretty cool! Here's a bit of a summary of what I was able / unable to do:

SDR

I used a cheap USB RTL-SDR connected to my may VHF/UHF antenna, and followed the setup instructions.

I wasn't able to decode any pagers. There might be some pagers left in denser urban centres, but not around my house...

433 MHZ

Here, I was able to decode:

Our greenhouse temperature sensor (on 433.92 MHz), and
Our car's tire pressure monitoring sensors (on 315.00 MHz)

I didn't decode anything on 868.00 MHz and 915.00 MHz, but I wonder if any digital information would be sent to and from the fire hall...

AIRCRAFT

There happened to be two small planes flying overhead (I could hear them), and they showed up on the map instantly.

SATELLITE

I didn't see anything, but I'm not sure that there was anything overhead either. Also, my GP9 has a pretty low take off angle so while it's great for ground VHF/UHF communications, it's actually a pretty bad antenna for satellite communications. A simpler quarter wave antenna would better here.

AREDN

Finally, since the interface uses http://localhost:5050 in the browser, I was able to access it on a different computer via AREDN.

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