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You can buy a Nordic Semiconductor NRF52840-DONGLE.
There you can try out different bluetooth profiles through the graphical application (plugged into the same computer, even) or flash it and make a simple standalone device with just power. It has built in LEDs and a button, you don't have to solder anything to play around.

Classic DEV Post from May 31

Presentation Tips for Technical Talks

Presentation Tips for Technical Talks

Frederik 👨‍💻➡️🌐 Creemers profile image
I'm never sure what to put in a bio. If there's anything you want to know, don't be afraid to ask!