DEFCON was such an incredible experience, and I genuinely want to express my gratitude to everyone who played a part in getting me there and making it an unforgettable time. A heartfelt shout-out goes to the RF Village - your support and hospitality meant a lot to me!
During my stay at DEFCON, I managed to put together a video that showcases some last-minute modifications I made to SDR4space. I couldn't have done it without the help of Lama_Blue, who pitched in with some programming assistance just in the nick of time. I also had the opportunity to set up two remote KrakenSDR stations, initially intended for direction finding, but they quickly pivoted to detecting FM-based communications.
The core idea behind this project was to create a network of interconnected stations using WiFi HaLow (802.11ah). Among these stations, two were equipped with KrakenSDRs and compact SteamDeck/Mini PCs. The third station was a laptop running DragonOS FocalX, just like the others. The video will walk you through how I got the MQTT service up and running to collect data from all these distant stations.
For the stations equipped with KrakenSDRs, I utilized SDR4space along with an internal SDR to monitor two different frequencies simultaneously. When any activity was detected, SDR4space captured the IQ data, performed FM demodulation, and sent out a wav file to WhisperCPP. Once the wav file was transcribed, the resulting message was transmitted via WiFi HaLow to the MQTT server hosted on the laptop.
This time around, the new SDR4space script on each station incorporated more functionalities, such as including GPS information, frequency details, messages, and supplementary data. This was a substantial improvement over my previous attempts. To keep a real-time track of the data flowing into the MQTT database, I relied on MQTT Explorer, which proved to be incredibly useful.
As I look ahead, I'm contemplating the possibility of utilizing the Elastic Stack to delve deeper into the data stored in the MQTT database, allowing for more comprehensive insights. The potential of this endeavor is both promising and thrilling, and I'm eager to see where it takes me.
Once again, a heartfelt thanks for making DEFCON an enriching and enjoyable experience for me. Your support truly means the world to me, and I'm grateful for the opportunity to be a part of such a fantastic event.
As always, If you find this video helpful
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12 авг 2023
