Kraken Software on Pi 5 with Kerberos - not working

I suspect I am missing something.

I have a KerberosSDR that I decided to fire up with the Kraken software. I followed the instructions on the Wiki for that, but am stuck.


  • Raspi5 flashed from KrakenSDR latest image,
  • KerberosSDR box, (no antennas connected)
  • 2.5A supply to KerberosSDR
  • 3A supply to Pi 5
  • App and web and hotspot on recent Samsung tablet, with ethernet port used to SSH in from my Mac for CLI access.

PROBLEM - errors in config display, doesn’t run. No doubt I’m missing something.

CURRENT STATUS: Configuration page shows the following errors:

Frame Sync: LOSS
Connected Status: Disconnected
Sample Delay Sync: LOSS


  • Installed KrakenSDR flash card on Pi5
  • Flashed the EEPROM as specified (had to install rtl-sdr package)
  • Set the DAQ File to kerberosSDR_default
    *…Note: looking at Basic DAQ Configuration shows:
    *…Preconfigured: Current, Active Configuration: kraken_default.
    *…THIS LOOKS WRONG - don’t know if it really is
  • Tested simultaneously all four receivers without error (see test results below)
  • Rebooted by power off/on repeatedly through all of this
  • Looked at ui.log and node.log - no clues

---- Result of running each kraken_test

Found 4 device(s):
0: RTL-SDR, KerberosSDR, SN: 1000
1: RTL-SDR, KerberosSDR, SN: 002
2: RTL-SDR, KerberosSDR, SN: 003
3: RTL-SDR, KerberosSDR, SN: 004
Found Rafael Micro R820T/2 tuner

Supported gain values (29): 0.0 0.9 1.4 2.7 3.7 7.7 8.7 12.5 14.4 15.7 16.6 19.7 20.7 22.9 25.4 28.0 29.7 32.8 33.8 36.4 37.2 38.6 40.2 42.1 43.4 43.9 44.5 48.0 49.6

Sampling at 2048000 S/s.

Info: This tool will continuously read from the device, and report if

samples get lost. If you observe no further output, everything is fine.

Reading samples in async mode…

Allocating 15 (non-zero-copy) user-space buffers

There is possibly a bug introduced by some recent PR’s in the latest GUI code which prevents the reconfigure and restart DAQ button from working correctly.

For now you can manually edit the ini file for kerberos by copying heimdall_daq_fw/config_files/keberos_default/daq_chain_config.ini into the Firmware/ folder, and overwriting the daq_chain_config.ini file in there already.

Alternatively, one version back of the image should be working for the button.

Also I notice that your EEPROM S/N looks incorrect. Something probably went wrong when writing that one, please try running the EEPROM script again.