The affordable software application defined radio platforms that can be developed out of a USB TV tuner aren’t getting much like on the Hackaday tip line of late. Thankfully, [Adam] sent in a excellent guide to cracking sub-GHz wireless protocols wide open, as well as ringing doorbells, opening cars, as well as potentially setting homes on fire in the process.

The very first wireless hack [Adam] handled to whip up is figuring out exactly how a wireless doorbell transmitter communicates with its receiver. [Adam] linked a FUNcube software application defined radio dongle (although any type of one of the many USB TV tuner dongles we’ve seen would likewise work) as well as utilized GNU Radio to send the radio signals got to a WAV file. When looking at this audio data in Audacity, [Adam] saw the tell-tale indications of digital data, leaving with a string of 1s as well as 0s that would trigger his wireless doorbell.

The FUNcube dongle doesn’t have the capability to transmit, though, so [Adam] needed a more capable software application defined radio to emulate the inner workings of a doorbell transmitter. He discovered one in the Ettus research study USRP, a software application designed radio that’s doing a great task of keeping [Balint], Hackaday SDR extraordinaire, extremely busy. By sending the data [Adam] decoded with the FUNcube dongle over the USRP, he was able to trigger his wireless doorbell utilizing nothing however a few hundred dollars of radio devices as well as software application ingenuity.

Doorbells are a low-stakes game, so [Adam] decided to step things up a bit as well as unlock his son’s cars and truck by catching as well as replaying the signals from a key fob remote. contemporary cars and trucks utilize a rolling code for their keyless entry, to ensure that entire endeavour is just a celebration trick. other RF-enabled appliances, such as a remote-controlled mains outlet, are a much larger threat to house as well as office security, however still one [Adam] handled to fracture wide open.