So I've got my device running, set up two services with some read and write characteristics and it all works like charm now.
But now I want to react to values written into some characteristics (change of parameters for sensors) and can't quite figure out how to recognise my server send sth. to my device.
I think I need to listen to an event coming up in the on_ble_evt()-Function? How do I now a value has changed and how can I react to it? Do I have to implement the Device Manager for this?