Using a Raspberry Pi 3B, Signalink, HT, direwolf and ax25-tools and ax15-apps. All up to date. Clean start.


sudo direwolf -p  
sudo kissattach /tmp/kisstnc wl2k

obtain assignment to ax0, then

beacon -s wl2k "testing"
  • first attempt - direwolf reports: Invalid transmit channel 8 from KISS client app.
  • second attempt - direwolf report: Invalid transmit channel 2 from KISS client app.
  • third attempt - works just fine and the RPi transmits the "testing" perfectly.

I want to address the channel issue and can find nothing in documentation. What is going wrong, what can I do to fix this?


This is issue #42 on Direwolf's GitHub page.


To work around it, put the interface into CRC mode "none" with a command like this:

# kissparms -c 1 -p radio
  • $\begingroup$ Thank you Mike. Actually figured this out by examining dmesg dumps. Came up with the exact same command line. Glad I was on the correct track. $\endgroup$
    – ASzy
    Jan 30 '19 at 0:02
  • $\begingroup$ @ASzy You can indicate that an answer solved your problem or is satisfactory by clicking the checkmark next to it. Welcome to Amateur Radio Stack Exchange! $\endgroup$
    – Kevin Reid AG6YO
    Jan 30 '19 at 0:52

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