How to automatically enter a PIN when pairing with Bluetooth?

Question

Java

Good day to all!
Could you tell me if it is possible to automatically enter the pincode (the pin code is hammered in the program and exactly the same in the Bluetooth module) when pairing with the Bluetooth module, if so, how to do it?
And could you tell me how to make Android connect to the Bluetooth module from those found, if the address of the module matches the address from the list of addresses scored in the program?