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LAUNCHXL-CC26X2R1: LAUNCHXL-CC26X2R1 No one of the nodes identified as RTLS MASTER

Part Number: LAUNCHXL-CC26X2R1
Other Parts Discussed in Thread: CC2642R

Dear Expert ,

Good day!

Our customer use the LAUNCHXL-CC26X2R1 to test the AOA , But they meet an error “No one of the nodes identified as RTLS MASTER” , after their software engineer debug , it shown "1 nodes not identified at all" . the details please refer to the picture below :

The test setting is shown below :

Python 3.7.4

SDK: simplelink_cc13x2_26x2_sdk_3_40_00_02


I had check the similar query 


Except this , could you provide more suggestions?