I think some folks are (or were) using micro:bit firmwares. It did work better in the past, at least for simple stuff using setAdvertising. I think setScan was always a bit flakey though.
It'd be great to get it back working properly though, if only because I've got a friend with a bunch of micro:bits who wants to build a big display out of them - and it'd be so easy with Espruino if setScan worked ok - but I think you may have fixed that already :)
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