One option is to consider turning a pi zero into a bluetooth midi dongle, I have a few and they come in handy often. https://neuma.studio/raspberry-pi-as-usb-bluetooth-midi-host/
When plugged into the Norns, it shows as a regular Midi device for ins and outs. I am then able to bluetooth connect to the Norns with my Ipad and send/recieve messages

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