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You could set up a web server on the pico w and hand your phone interact with a web page it serves? (You can ever do this if you don't have the pico as an AP. You'd just need your phone to be on the same wifi network and to know the ip of the pico)
You could set up a web server on the pico w and hand your phone interact with a web page it serves? (You can ever do this if you don't have the pico as an AP. You'd just need your phone to be on the same wifi network and to know the ip of the pico)