HIDAPI is a multi-platform library which allows an application to interface with USB and Bluetooth HID-Class devices on Windows, Linux, FreeBSD, and Mac OS X. On OpenBSD (like on FreeBSD), the backend uses libusb-1.0 to communicate directly to a USB device. This back-end will of course not work with Bluetooth devices.
WWW: https://github.com/signal11/hidapi
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