fm_transmitter VS urh

To share a recent example, with just ~100mW of transmission power, they managed to fly an RC plane to a distance of 100km: https://www.youtube.com/watch?v=CYJ2UOrlXgM .(Their transmitter from the ground station was configured at a higher power, but the transmitter on the aircraft was transmitting telemetry back at 100mW throughout the distance)

Another related fun project is using raspberry pi gpio to work as an FM transmitter: https://github.com/markondej/fm_transmitter

The more in-depth way would be to build something yourself, based around a raspberry pi compute module or similar. You could then pick out all the hardware individually, and even include things like short-range radio comms. Putting it all together in a nice case and making all the software play nice would be quite a project though.

it's just a raspberry pi 3B with some software and a random ass radio lol

Clone this repo and build it. Follow it's instructions and find a tutorial (https://pimylifeup.com/raspberry-pi-pirate-radio/) if you need. https://github.com/markondej/fm_transmitter

I am currently following this guide https://github.com/markondej/fm_transmitter

You have to do a few more clicks for the link to the project.

here is the program i am using

as long as you have a fully updated raspberry pi with some form of raspbian, you can broadcast. You can find a lot of tutorials online, but the software I used can be found here: https://github.com/markondej/fm_transmitter

>> or somewhat expensive and complex SDR

I don’t think that’s as accurate today as it used to be.

On the hardware side there are tons of options very cheaply available - iirc the flipper uses the c1100 (or a number like that) it’s a popular cheap chip and it’s well documented and interfaces easily with arduino.

More accessibly, lime mini SDRs are cheap but there’s quite a few alternatives too.

On the software side GNU Radio is free with decent tutorials - we’re not talking anything like blender levels of difficulty to adopt even if it is a complex domain.

Although on the more accessible side, urh is incredibly powerful given how easy to use it is https://github.com/jopohl/urh

I used the latter to tap into a 2 channel wireless bbq thermometer via a $10 rtl sdr and that was a breeze, an absolute walk in the park compared to when I reverse engineered the flysky telemetry system.

Universal Radio Hacker on Github

you should check out Universal Radio Hacker

Check out URH.

URH can read flipperzero sub files and can export from wav to sub... https://github.com/jopohl/urh

Throw the recording at UniversalRadioHacker and see what it does with it!

I dont have much knowledge on decoding a signal from scratch but try URH - universal radio hacker here. It might be able to do what you need.

It's useful for transmitting digital RF signals to control household stuff, eg. ceiling fans or whatever. You'd want to also look into rtl-sdr and Universal Radio Hacker.

Tried tool https://github.com/jopohl/urh and it does not get too much information. I am expecting to find something similar to wireshark - it can detect protocols in traffic and highligh different kind of fields in packet headers.