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Or install a Cat. :)
I’d play with this if I had time…
https://www.hackster.io/inmyorbit/build-a-mobile-app-that-connects-to-your-rpi-3-using-ble-7a7c2c
From there go to:
https://github.com/sandeepmistry/bleno#characteristic
oh…thank you :)
if you know method, please can you teach me?