I have been using raspberry pi and node-red for a while now and was considering to use my raspberry pi zero w as a hotspot to communicate with my polar heart rate monitor to display the information.
I have played a bit with gatt but don't seem to get a grip on it. Can anyone please point me towards a tutorial that I can follow along step by step to understand it?
I have used MQTT and I assume gatt works in a similar way or server and client communication?
Much appreciated and looking forward to starting this exciting project and learning more useful functionalities