Steps taken:

• Use of Elektor Uno R4 board with small modification to use it as 3.3V MCU with 328PB that has 2 HW USARTs.
• Added reset line to RN2483 to solve instable situations for communication.
• Successful test with use of Serial and Serial1 in Arduino sketch for RN2483 communication and debugging via serial console

Details of progress and next steps in main text of project.