About UUID_Services and UUID_CHARACTERISTICS

Question

Hi,I use 51822 to make a fitness device. one of the function is advertising current value(Steps,Heart rate,Distance,Calorie) to the phone over BLE. What the default service and characteristics I must add? Or I can add a customer service and characteristics by myself. 
 Anyway, how do I start? 
 The ble_app_hrs example can work well on my EVK board.
Can I use BLE_UUID_HEART_RATE_SERVICE and BLE_UUID_HEART_RATE_MEASUREMENT_CHAR to do these things or I must create new one? 
 Thank you.

Carles · Accepted Answer

Hi there, 
 
 Is that right? Can I sign a name for my service or characteristic? 
 
 That is right, since it's a custom profile and the generic app you are using on the phone does not know about it. 
 You can add a name to the service in 2 ways: 
 
 If you write your own Smartphone app, then you can detect your UUID and simply display the service name 
 If you want standard apps to see a displayable name, you can use the "Characteristic User Description Descriptor", which contains a human readable UTF-8 string. This won't be of much use for the standard app though, since it won't know what to do with the data you notify (it's a custom profile after all) but at least you'll be able to read a string. 
 
 Carles