What is the difference between services and profiles in a BLE GATT server

Question

I'm new to Bluetooth classic and Bluetooth Low Energy. After I watch the tutorial video on the dev site of android. I still don't understand what is a service in ble and what is the difference between service and profile. Can anyone helpe me?

Thanks.

Answer 1

Profile define all communication functions to a BLE device, you can assume it is a higher level of abstraction, it has one or more service, which expose the sensor data on a GATT server. eg Heart rate, temperature or Cycle speed. In simple Profile has Services, and Service has Characteristics, Characteristic descriptor.