Trouble with Lua modules like rc: returning nil with navio2?

ArduCopter
1

I have a issue where my Lua scripts keep crashing with an error saying “Lua: ./scripts/servo.lua:10: attempt to call a nil”. I believe this means that the modules have not been loaded. But it seems like they should be loaded after enough time? Not sure why there failing to load. I am running on a navio2 with a raspberry pi 4.

2

Share the code snippet that is causing the issue. It is more likely a problem with the script.

Also reply with the exact ArduPilot version in use.

3

Sure thing.

  • I am currently running ArduCopter V4.0.3

This code snippet is what I’m trying to run. I did my best to base it on the docs:

---@diagnostic disable: need-check-nil
---@diagnostic disable: param-type-mismatch

function update()
        --if not rc or not rc:has_valid_input() then
        --      gcs:send_text(6, "Waiting for rc signal...")
        --      return update, 5000
        --end
        ch5 = rc:get_pwm(5)

        gcs:send_text(6, "Channel 5: " .. ch5)

        return update, 1000
end

return update, 1000

I used to have a return update() at the very end of the script.
Let me know if I can provide any other information. Thank you in advance.

4

The issue is almost certainly with the extremely old version you are running. Scripting was brand new at the time, and many method names/binding references have changed since. Recommend you update the firmware rather than chasing these scripting issues.

1 Like
5

I will try that. Thanks for the suggestion.

6

That worked (should have thought about that :man_facepalming:). Thanks again.