Spyserver: stopped immediately

[Dirk--]

just tried the spyserver input option (without success):
Station Amsterdam, NL:

• Server version 2.0.1922
• Device type Airspy HF+

AIS-catcher  -y sdr://77.168.173.76:5555 -gy GAIN 14 -v
AIS-catcher (build Oct  8 2025) v0.62-157-g30183728
(C) Copyright 2021-2025 jvde-github and other contributors
This is free software; see the source for copying conditions.There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
Connecting to SpyServer...
TCP (77.168.173.76:5555): connected.
Device info:
  Serial: 808595509 DeviceType: 2 MaximumSampleRate: 912000 MaximumBandwidth: 780000
  DecimationStageCount: 8 GainStageCount: 0 MaximumGainIndex: 11
  Minimum/Maximum Frequency: 0/1700000000 resolution: 16
  MinimumIQDecimation: 0 ForcedIQFormat: 0
Client:
  CanControl: 1 Gain: 7 DeviceCenterFrequency: 87500000
  IQCenterFrequency: 87500000  Minimum/Maximum Frequency: 390000/1699610000 resolution: 16
sample rate 228K upsampled to 288K.
SPYSERVER: protocol ID not supported (0.0)
SPYSERVER: no valid message received.
Device    : SPYSERVER
Settings  : rate 228K format CS16 host 77.168.173.76 port 5555 gain 14.000000
Model #0 -> (Src: 1, Grp: 1): [AIS engine v0.62] ps_ema ON afc_wide ON droop ON fp_ds OFF dsk OFF 

----------------------
[AIS engine v0.62 #0-0]                 total: 0 msgs

TCP (77.168.173.76:5555): Disconnected.

other siteGenua, IT (lots of AIS broadcasts):

• Server version 2.0.1700
• Device type RTL-SDR

AIS-catcher  -y 212.216.163.100 5555 -gy GAIN 14 -v
AIS-catcher (build Oct  8 2025) v0.62-157-g30183728
(C) Copyright 2021-2025 jvde-github and other contributors
This is free software; see the source for copying conditions.There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
Connecting to SpyServer...
TCP (212.216.163.100:5555): connected.
Device info:
  Serial: 0 DeviceType: 3 MaximumSampleRate: 2400000 MaximumBandwidth: 2000000
  DecimationStageCount: 9 GainStageCount: 0 MaximumGainIndex: 29
  Minimum/Maximum Frequency: 24000000/469000000 resolution: 8
  MinimumIQDecimation: 6 ForcedIQFormat: 0
Client:
  CanControl: 1 Gain: 14 DeviceCenterFrequency: 144000000
  IQCenterFrequency: 144000000  Minimum/Maximum Frequency: 24015625/468984375 resolution: 8
Model: sample rate must be between 96K and 12288K (inclusive).
TCP (212.216.163.100:5555): Disconnected.

Any hints?
Thanks, Dirk

[jvde-github]

Question, can you approach the first via SDR#? Seems some protocol error....

[jvde-github]

Ok, did a check and with an external tool I can get the stream to work and decode AIS messages for the first server. I will investigate and fix. Thanks!

[jvde-github]

So, the second station does not support minimal sample rate of 96k so cannot be used for dual channel AIS.

For the first one, I think it is linked to the version of the spyserver software. Probably needs some time to reimplement some parts.

[Dirk--]

Thanks Jasper,
checked these spyservers yesterday: https://wiki.opennauticalchart.org/index.php?title=AIS-Sources#spyserver

[jvde-github]

Hi Dirk,

is fixed for the first example: a more recent version of the spyserver software (2.0.1921) sends more data in the sync (don't know what). But I ignore this data now (like other open source examples) and makes it run for this version as well. Thanks for raising.

The second example, is an issue with the highest sample rate supported being < 96K. I now have added a cleaner error about this.

[Dirk--]

Thanks Jasper:

1. ec045b8
2. bbf8f8f