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Figuring out partly known signal

Posted: Sat Oct 06, 2018 4:26 pm
by turboscrew
I wonder if there is good tools for figuring out signals that are partly known.
I have an USB 433MHz dongle, and I've been trying to communicate with it using small SPI-connected radio boards.

I know the central frequency is 433.90 MHz and that it uses GFSK. Data rate is 9600 bps (default), but I have no idea of the deviation or number of preamble bits etc.

I managed to receive data from the dongle, but I haven't been able to send to it, and I have no idea what's unacceptable about the frame I'm trying to send to it. I haven't even got an RSSI-reaction. The dongle communicates with another similar dongle without problems.