However, since most computers no longer provide a serial port, a serial hardware device will usually be connected to a computer via a USB to serial converter. If the hardware device has an RS-232 serial connection and is directly connected to a computer serial port, the computer does not require a device driver for that device. If the hardware device is connected to a computer via a wired or wireless IP network connection, the computer does not require a device driver for that device. When one of these meters is plugged into a computer, Windows automatically connects to the meter without requiring an external device driver. USB HID devices that are supported by Calman include the SpectraCal C6 Colorimeter and the X-Rite i1Display light meters. Other devices that comply with the USB HID spec are also recognized automatically by a computer and don’t require a separate device driver.
A computer doesn’t require a separate device driver for USB HID devices because they are recognized and handled directly by the Windows operating system. The USB Human Interface Device (HID) class is a specification for computer peripherals such as keyboards, mice, and game controllers.
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The device driver tells the computer how to properly handle data communications between the computer and the hardware USB device. If the hardware device has a USB interface connection and is connected to a USB computer port, the computer needs to have a device driver installed (unless it is a USB HID device see below).
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