Update - no idea why - but the identical build moodlebox and Pi that is in a remote village has NO drop out issues so far. My Moodlebox in a wi fi zone with loads of wi fi sources does. I suspect that there must be interference from so many signals - I have selected 6 and 11 as channels and still have the issue but only on my box which is test so I can live with it.
What it maybe - hypothesis - is that the chip on the pi is scanning/finding/swapping/indexing all the asp's around it for potential connection. I can't see a time rhythm however. Frankly, I don't have an answer - a few people have this issue - many don't. It does happen and anything I try is ineffective (powermanagement/cron jobs/signal identity/remove pi from box).
I'm rolling out into remote areas and I'd love to know what is the causes as it will bite me one day. If anyone has any thoughts I'm open to ideas.
I was wondering if the compute module 4 and i/o board with the aerial maybe an idea. Anyone know if the aerial on the compute board boost signal?
Thanks as always