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Arduino HID keyboard with rotary encoder and OLED display. Uses pro micro running VUSB to achieve firmware based usb. : r/arduino
GitHub - julianschuler/USBKeyboard: Arduino library to add HID USB keyboard functionality to your projects
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Amazon.com: UART / TTL / RS232 / RS485 Serial Port to USB Keyboard Protocol CH9328 HID IO : Electronics
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For UsenDz@, YS2112, HID, SMBUS/I2C, Master, free drive, GPIO, USB, 1.8V, I2C|usb usb|gpio usbusb gpio - AliExpress
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