BLE data transfer from CC1350 STK to Esp32 Wroom

[Shyam sundar]

Hi
I am beginner to esp32 and sensortag stk.
I am using Simple peripheral in cc1350 STK to transfer data via Bluetooth low energy to esp32.To connect with esp32 wroom and transfer data should i use gatt client or ble spp client api project or any other?
which are the topics i should get familiar with?
i have gone through device specification and basic api programs but did not get any idea.
could you please suggest any books or webpages where i can get any information about my task?
Thanks in advance
best regards
Shyam