Ho to send a "BULK in" message with pyusb with python

Question

I would like to recover data from my sound level meter Velleman Dem202

For that I have decided to use python pyusb to access from my Host to the Device

To understand the protocol exchange used, I have scanned the message exchanges with wireshark usb traffic capture.

For example, based on

I could identify the parameter to use for ctrl_transfer

    import usb.core

    def connect():
        dev = usb.core.find(idVendor=0x10C4, idProduct=0xEA60)
        assert dev is not None
        print(dev)
        return dev

    def readSPL(dev):
        ret = dev.ctrl_transfer(0xC0, 16, 0, 0, 200) # wvalue (3rd arg) is ignored
        return(ret) 

    if __name__ == "__main__":

        # connect Device over USB
        dev = connect()

        while True:
            ret = readSPL(dev)
            print(ret)
            time.sleep(1)

My question is following:

How to read the "BULK in" message with pyusb

This message seems to read the "decibel info data" from my DEVICE

How to adapt the code to get the answer of frame 3039 below

Thanks