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Analysing 433 Mhz transmitters with RTL-SDR

Posted on Wednesday, June 25th, 2014 in code, digital radio data, Linux, open source, SDR by the machinegeek

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Yashin has posted this tutorial at ArcanumX demonstrating how to read and decode 433 MHz digital data transmissions. “I intend to demonstrate how the RTL-SDR can be used to sniff 433 Mhz transmitters. These are pretty cheap and can be found in a lot of appliances including alarm sensors. This post is also intended to be an intro to RTL-SDR usage. I suggest you get Kali linux (1.0.6>) on your system as it has most of the dependencies required for this demo.”

The technique involves receiving the signal using an RTL-SDR dongle which feeds into a GNU Radio program. GNU Radio extracts the signal to a wave file which can then be analyzed using rtl_433 software. Yashin gives a good explanation here on exactly how to use GNU Radio to capture these signals, detailing the proper (though easily overlooked) way to terminate the recording of a wave file.

This entry was posted on Wednesday, June 25th, 2014 at 6:00 pm and is filed under code, digital radio data, Linux, open source, SDR. You can follow any responses to this entry through the RSS 2.0 feed. You can skip to the end and leave a response. Pinging is currently not allowed.

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