The image below is from a freely available [https://developer.apple.com/library/mac/samplecode/HeartRateMonitor/Introduction/Intro.html CoreBluetooth sample application] from Apple showing how to work with Bluetooth Low Energy services and characteristics:
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L'image ci-dessous présente une capture de l'application [https://developer.apple.com/library/mac/samplecode/HeartRateMonitor/Introduction/Intro.html CoreBluetooth sample] disponible gratuitement pour Apple montrant comment fonctionne les services et caractéristiques Bluetooth Low Energy: