No output using rtl_fm

[MrBLJ]

Hello there,

There hasn't been any activity on this repo for a long time, so if anyone is here, I could you some help. I'm a total noob related to radio stuff, but I know a bit about electronics and I'm trying to use your tools to sniff the signals of my shutter's remote.

Thing is, I'm getting mixed and random results. I successfully sniffed signals using the command :

rtl_fm -M am -f 433.42M -s 270K | ./am_to_ook -d 10 -t 2000 - | ./decode_somfy

The log was very helpful, I could verify that the open, close and stop command were correctly catched. Now, I don't know why or how, but it's not sniffing anythin anymore, the output is empty :

Using device 0: Generic RTL2832U OEM
Found Fitipower FC0012 tuner
Tuner gain set to automatic.
Tuned to 433690000 Hz.
Oversampling input by: 4x.
Oversampling output by: 1x.
Buffer size: 7.59ms
Exact sample rate is: 1080000.025749 Hz
Allocating 15 zero-copy buffers
Sampling at 1080000 S/s.
Output at 270000 Hz.

Things I've already checked/made sure of :

• The remote is working, it can operate the shutters.
• I can see the signals is I use the SDR with airspy.
• I'm using a extension coord for my SDR, so it's not directly plugged into the PC. I've also tried with plugin it directly: same result.
• rtl_test does not show major package losses.

The only thing I'm not sure about is : I'm using a laptop, plugged in. Could this cause some issues ?

Thanks for any help you can provide :)