No Output from RTL433

[Dan Rooney]

Hi all

Running RTL433 on a NooElec SDR, trying to trap the output from my Fine Offset WH1080 weather station. I am on the correct frequency 433.975MHz and can see the signal on the waterfall, with good strength. However I get zero output on the screen from RTL433. I am running with the following parameters:

rtl_433 -f 433975000

Found 1 device(s):
  0:  Realtek, RTL2838UHIDIR, SN: 00000001

Using device 0: Generic RTL2832U OEM
Found Rafael Micro R820T tuner
Exact sample rate is: 250000.000414 Hz
Sample rate set to 250000.
Bit detection level set to 8000.
Tuner gain set to Auto.
Reading samples in async mode...
Tuned to 433975000 Hz.

If I choose -a then I see the debug output,

*** signal_start = 12018483, signal_end = 12136340
signal_len = 117857,  pulses = 78
Iteration 1. t: 961    min: 486 (76)    max: 1437 (2)    delta 4097
Iteration 2. t: 961    min: 486 (76)    max: 1437 (2)    delta 0
Pulse coding: Short pulse length 486 - Long pulse length 1437

Short distance: 304, long distance: 844, packet distance: 26274

p_limit: 961
bitbuffer:: Number of rows: 2
[00] {39} 00 08 00 00 00 : 00000000 00001000 00000000 00000000 0000000
[01] {39} 00 08 00 00 00 : 00000000 00001000 00000000 00000000 0000000

So what am I doing wrong, not getting any output??

Thanks in advance

[Benjamin Larsson]

Save a signal sample with rtl_433 -f 433975000 -a -t and upload it to
https://github.com/merbanan/rtl_433_tests or somewhere else so we can
take a look.

MvH
Benjamin Larsson

[Robert Terzi]

On 2/14/2016 5:27 AM, Dan Rooney wrote:
> Hi all
>
> Running RTL433 on a NooElec SDR, trying to trap the output from my Fine Offset WH1080 weather station. I am on the correct frequency 433.975MHz and can see the signal on the waterfall, with good strength. However I get zero output on the screen from RTL433. I am running with the following parameters:
>
> rtl_433 -f 433975000

1. Make sure you are running the current rtl_433 code from merbanan/master
2. Use -l 0, to set the detection level to automatic. (It might be time to make this the default).
3. Add -A. You will be able to see if you are receiving any signals that get detected as pulses.

If you get pulses that are detected by the analyzer but aren't decoded, run with -a -t and share the .data files.

Hope this helps,
--Rob