Which Central code can I use to exchange data considering the Peripheral code presented in the course?

Question

Hello everyone, 
 I'm taking the "Bluetooth Low Energy Fundamentals" course For all the examples I followed in the training, from what I understood, we loaded the peripheral code on the nRF52840 board and needed the App on the cell phone to simulate the Central. 
 
 https://academy.nordicsemi.com/courses/bluetooth-low-energy-fundamentals/lessons/lesson-4-bluetooth-le-data-exchange/topic/blefund-lesson-4-exercise-1/ 
 In this case, would there be a Central code that could be placed on the board? To test with two nRF52840 boards. 
 An nRF52840 board as central and another nRF52840 board as peripheral. 
 
 I would just like to send different types of data between two nRF52840 boards. Thanks.

Edvin · Accepted Answer

Higo said: 3) About Central. In other test, I got the Central and Peripheral generic codes and was able to flash them on different cards. I was able to scan on the Central side; and also do advertising on the Peripheral side; and connect both. Now I need to be able to transfer data between the two boards. 
 I am glad to hear. This is a quite versatile example, and it can easily be changed to suit your need. 
 Higo said: In the exercise the representation to button characteristic is 0x00001523, 0x1212, 0xefde, 0x1523, 0x785feabcd123 is segmented in 5 parts, but in page Services and characteristics, is demonstrated the are 4 parts (Handle, Type(UUID), Permissions, Value). I'm confused. 
 I think you got it a bit mixed up. The 5 segments make up the entire UUID alltogether. The UUID is 128 bit, (so that is 4 bytes + 2 bytes + 2 bytes + 2 bytes + 6 bytes = 16 bytes = 128 bits) 
 If you follow the tutorial strictly, it should be correct. Please let me know where (on what step) you are stuck if it doesn't work. 
 BR, 
 Edvin

Which Central code can I use to exchange data considering the Peripheral code presented in the course?

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