Do you want a short project with incredible information? That's me with an old Raspberry Pi 2, a NooElec NESDR Mini 2 and some time.
I read this article last year and like many articles, I thought it would be great to replicate one day, adding it to my list of projects to do when I have free time. After my large project recreating my company's product was successful, this was the time to do something quick, different and fun.
I used the Raspberry Pi Imager to get the latest version of Raspberry OS with desktop environment (since this will be mobile). I also adjusted the settings to set hostname, enable SSH, WLAN, etc to all my needs.
With the OS installed, I built the hardware, connecting the screen to the Rpi and inserting the SD card.
At first boot, the screen will be backwards, we can fix that by going to Preferences > Screen Configuration.
We don't need to install much to get this project underway:
sudo apt update && sudo apt full-upgrade -y && sudo apt install rtl_433 -y
With the NooElec device connected and its antenna plugged in, run sudo rtl-433 -y .
Run around a parking lot when you run "sudo rtl_433" and see all the fun things you find! Adjust different parameters to find new devices around your home, such as car fobs and more. Check out more information on Github.