ah, yeah… I see i said mine was 1.3, and 1.5 was incompatible (in the first post 
)
given i was so specific, i’d say I’d looked up chipsets - and so knew why 1.5 would be incompatible.
but it was a long time ago, so can’t remember specifics, you’d have to go dig into specs.
as for recompiling kernel, as I said its difficult - again, Ive commented on this before above
here are some details from when I tried last time
https://forum.critterandguitari.com/t/kernel-compilation/1609
this is the post where I looked into creating a new ‘distro’ based on armbian
https://forum.critterandguitari.com/t/organelle-linux-upgrade-project/2351
BUT, I didnt really finish this off, so whilst it looked promising, its more of a ‘project’ than something people can just use.
so unfortunately, I think all I can suggest is using an usb wifi stick again…
as I mentioned at the start, Ive only any experience with the 1.3 revision, also the one Andy got working was also 1.3. ( I guess, the 1.3 stock is depleted now, give i was a couple of years ago!)