How to transmit I/Q RF files?

Sub-GHz
#1

Hey all…

Couple of questions… I can’t quite afford a HackRF yet… so was wondering

  1. if there were any tutorials on transmitting I/Q RF files, and if so,
  2. what kind of duty cycle can be used? Can the FZ run at 100%… or is 20-30% mac recommended?

T.Weeks

1 Like
#2

Do you have a Raspberry PI? If so RpiTX might be an option.

#3

That’s where I started, but it doesn’t work clean enough without an output LC filter… and I have a presentation in two days… and there are no longer any radio shacks in town to pick up specific cap values needed. So I figured if someone had done I/Q to FZero Tx… then I could do it more rapidly there.

How do you all create subGHz, RF files that are not raw (recorded) files?

T.Weeks

1 Like
#4

Flipper does not work with I/Q - it is not an SDR.
Flipper’s radio chip CC1101 supports binary data over quite a range of frequencies and modulations; refer to the datasheet for details.

If your data is binary, try either decoding it in URH and synthesizing the .sub or doing the conversion with a script (example is ook_to_sub.py from flipper_toolbox repo)

Most of the files was recorded with the Flipper itself, lesser amounts was crafted according to description of protocol.

#5

Boy do I miss them.

Raw files are generated with the read raw function and can record most simple transmissions within the frequency range of the Flipper. The “non raw” files are files in types the Flipper specifically understands. So for instance if you were speaking Chinese to me I could record it and play it back but if you were speaking English to me I could transcribe it into text as well. Raw files are a collection of timings for the on, off, 1’s, 0’s. They also include the modulation type AM/FM.

If we understood what exactly you are trying to do it might help.

Personally I might consider dumpster diving, reaching out to a local maker space, or just driving to find the correct cap at this point. Two days is going to fly by and starting over doesn’t sound prudent. There are still places that sell what you need in physical stores.

I’m not sure if you can directly send bits to the Flipper radio but maybe that’s a possibility using the command line interface.