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merbanan / rtl_433

Program to decode radio transmissions from devices on the ISM bands (and other frequencies)
GNU General Public License v2.0
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Silent Gliss SG11490 blinds remote decode help #3083

Open hamchapman opened 4 days ago

hamchapman commented 4 days ago

I've got an electric blinds remote that I'm trying to decode and I'm struggling to work out how to make progress.

Some links about the remote:

A PDF with some info:

11490_5_channel_wall_switch_868-915

I've captured some samples of pressing some different buttons and attached them as sg-samples.zip:

sg-samples.zip

I captured them using the following command:

rtl_433 -f 868M -S unknown

Hopefully the filenames explain what each sample is but the summary is that there are 5 different types of sample, with 3 instances of each. The different "types" are:

Please let me know if you can suggest some ways for me to progress with getting to a decoder 🙏

zuckschwerdt commented 4 days ago

It seems there is much noise and little of a sine waveform to clearly see the FSK. (try https://triq.org/spectrogram-next/ to load a cu8 and mouse-scroll zoom in to see no real sine waves.)

Try a higher sample rate (-s 2048k ?) and different placement or antenna and such. The first 20 or so bits in the decoding on https://triq.org/pdv/ should be a regular pattern like 101010101…

hamchapman commented 3 days ago

Thanks for the suggestions. I've tried using a higher sample rate but things look pretty much the same, same with different placement.

I'm using an RTL-SDR v4 with this antenna. Should that work as a combination to be able to get a good read on the signals? Any suggestions for other things I could try if not? Thanks!

zuckschwerdt commented 2 days ago

It should work. Maybe try without an antenna and 20cm – 1m distance? You can compare with some FSK signals in https://github.com/merbanan/rtl_433_tests to get a feeling what you are looking for.