IoT multi sensor kit

Hi,

I m using IoT multi sensor kit with DA14585_IOTP_v6.160.4 SDK

I have seen code..

i find some of characterstics are in BLE are not known.

1.control

2. control_reply

3. Multi_sensor_report

我发现these in ""user_dws_config.h""

please help what is the purpose of it and what is its use in ble communication..for what purpose they are used ??

please help in me in detail