IWR6843ISK: 68xx_vital_signs demo without MMWAVEICBOOST

Hello Champs,

HW: IWR6843ISK

Demo: C:\ti\mmwave_industrial_toolbox_4_7_0\labs\vital_signs\68xx_vital_signs\

Customer used only IWR6843ISK without MMWAVEICBOOSTboard. He modified the serial port num in mainwindow.app and run the demo. But sometimes it can run well, sometimes there is much noises.

What may cause the issue?

modify mainwindow.app 

Thanks.
Rgds
Shine