Do you want to exchange data between ESP32 (the Sender) and UNO (the Receiver) using Bluetooth Modules? If so, then you need the following equipment:
ESP32
UNO
BT1 as Master to be connected with ESP32
BT2 as Slave to be connected with UNO
You may follow Task-12.3 of the attached file for Master/Slave operation of Two Bluetooth Modules.
Expt-12(PCD) (2).pdf (720.3 KB)