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IWR1843BOOST: No data is being returned from the IWR1443BOOST.

Part Number: IWR1843BOOST
Other Parts Discussed in Thread: IWR1443BOOST

Tool/software:

dear Sir

I have opened the communication port on my PC as shown below and am communicating, but midway through, data stops being sent from the IWR1443BOOST.

Recieving PORT:

    Serial_Port = serial.Serial(
        port = 'COM5',
        baudrate = 115200,
        parity = serial.PARITY_NONE,
        bytesize = serial.EIGHTBITS,
        stopbits = serial.STOPBITS_ONE,
            #timeout = 1 #None,
            #xonxoff = 0,
            #rtscts = 0,
        )
Sending PORT:
    Serial_Port = serial.Serial(
    port = 'COM4',
    baudrate = 921600,
    parity = serial.PARITY_NONE,
    bytesize = serial.EIGHTBITS,
    stopbits = serial.STOPBITS_ONE,
        #timeout = None,
        #xonxoff = 0,
        #rtscts = 0,
    )
There is no COM port open error.
The sending configuration file is "profile_2d.cfg". After this, I try turning the IWR1443BOOST off and then on, restarting the PC and trying to communicate again, but the same thing happens.
What is the cause?
Please tell me the solution.
Thank you