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CC2640R2F: Change MAX_PDU_SIZE and then occur problem communication Bluetooth V5.0

Part Number: CC2640R2F
Other Parts Discussed in Thread: LAUNCHXL-CC2640R2

TI Support,

Why after setting MAX_PDU_SIZE is 255 and then Bluetooth can't communication large packet in Bluetooth V5.0 but V4.2 no problem?

Can you recommend how to fixed this issues? 

Note: If change MAX_PDU_SIZE is default and then Bluetooth V5.0 can communication no problem but speed transfer data it slow than Bluetooth V4.2

I use software project Simple serial socket Server

Copyright (c) 2020, Texas Instruments Incorporated


Code Composer Studio Version:

This is HitHub link of  TI SimpleLink CC2640R2 SDK

This is LAUNCHXL-CC2640R2 LaunchPad Board link


Vasu Khwanyuen