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You're looking for the BL-USBMACH-V2.1 driver download!
Here are the key features and details about the BL-USBMACH-V2.1 driver: bl-usbmach-v2.1 driver download
The BL-USBMACH-V2.1 is a USB-to-serial converter driver developed by Byte-Line, which allows you to connect a device with a serial interface to a computer via USB. You're looking for the BL-USBMACH-V2
