What's Your Favorite BLE demo?

[rocksetta]

I teach high school robotics and after the BLE blinky program which works greata with mobile nrf-connect, I wonder what people think is the best, generic BLE

Central and Peripheral example to run, that is easy to get going with 2 boards, but actually teaches a lot about BLE, possibly with mobile App nrf-connect communication.

Wading through the examples to find great apps, when my experience with BLE is limited is a bit confusing.

[RSA]

There are some tutotials with the BLE fundamentals starting with This

By following the example you should learn how to implement services and the like. Another good guide is THIS  application note

These are basen on OLD SDK's and i recommend comparing them with the blinky example , the theory is the same but the API is slightly different (mainly in gap_params_init() if i remember correctly), but easy to get working and up to date.

With that being said, have you looked at the Arduino Nano 33 BLE featuring the NRF52840

I haven't, but to my general knowledge, arudino SDK is a bit more fun to play with (atleast the good 'ol Atmel versions), but the bar is pretty low when comparing to Nordics SDK imo.