Questions tagged [radio-interception]

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433MHz Protocol: Unknown Three-Symbol-Encoding within the OOK data

Reverse engineering the protocol of a remote-controlled wall socket (433MHz On-Off-Keying) revealed an embedded pattern which apparently uses three symbols (besides 0s). Symbol A = 000001 Symbol B = ...
  • 123
2 votes
1 answer

Identifying the logic in remote control data packets

I have a set of 4 power sockets that can be turned on and off with an RF remote. That remote has 4 pairs of on/off buttons along with a master pair that can control all sockets at once. Initially, the ...
  • 141
2 votes
0 answers

There is an implant in me, is there a way to identify the frequency it is receiving signals on?

There is an implant in me, is there a way to identify the frequency it is receiving signals on? I don't want to share the evidence and my reasoning for believing there is an implant in me, you can ...
2 votes
0 answers

How to replay a signal on a different frequency with Gnu Radio Companion and Hack RF

I captured the traffic of a remote control for a LED light. I have multiple of those LED Lights. The payload seems to be the same for each device but the frequency(channel) differs. For one LED light ...
  • 121
0 votes
0 answers

Decipher hexadecimal GPS coordinates from UDP message

I'm trying to get the GPS lat/long data from a UDP message. It's captured on a radio dispatch console on a P25 radio system, if that helps. I captured this UDP message when I sent a simulated ...
  • 101
3 votes
0 answers

Recovering data from mystery signal

I was scanning the airwaves using my RTL-SDR and found a signal being broadcast locally that I was able to receive. When I configure the SDR Console V3 software to NFM, I get the following audio. (Wav ...
  • 31
2 votes
0 answers

Need help with a PiWM encoding question

I am working on reverse engineering a signal that I am fairly certain is a PiWM encoding. I think I have figured it out, but the data seems to be gibberish so I am looking for some help to confirm ...
3 votes
0 answers

Radio Signal 433.92MHz ASK OOK modulation, encoding?

Considering a key fob for RKE (remote keyless entry, automotive) its signal has been captured: It sends at 433,92MHz simple on/off. Following I regard the deltas (time differences between on-off or ...
3 votes
1 answer

Interact with a 868,95 MHz device

I've got a device that measures the heat in my apartment and sends the data to a master every day. It works on 868,95 MHz frequency. I want to be able to read this data. I've got some basic in Arduino,...
7 votes
4 answers

System for reverse engineering RF signals

Lately I've been experimenting with software-defined radio (SDR) and have come up with some heuristics by which I can visually identify certain kinds of signals by looking at their representation on a ...
  • 2,521
7 votes
2 answers

Which instrument is effective in discovering carrier frequency?

If two devices have wireless interconnection, how to detect carrier frequency? Range may vary in all radio, from FM, GSM to Wi-Fi and WiMax. Which tools are effective for doing this? Which one is ...
17 votes
2 answers

Intercepting GSM communications with an USRP and Gnu Radio

I would like to know what is needed to intercept GSM communications with an USRP (Universal Software Radio Peripheral) and using Gnu Radio. Is there tutorial about that ? What type of USRP is ...
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