What BLE services should I add when I make a new BLE project?

[shali lv]

Hi, Now I want to make a project myself. My project include A/D and BLE for transmiting AD result. But I am confused about what BLE services should I add in my project. and what is the use of ble_ias, ble_lls,ble_bas and etc.? Is there a documentation about them?

thanks in advance

[shali lv]

thanks Kristin I will have a look in detail at this example. Best Regard