1 USB to USB keyboard protocol converter
2 ======================================
3 See for detail and discussion here.
5 - https://geekhack.org/index.php?topic=69169.0
10 There are two options.
12 ### TMK USB-USB Converter
13 You can buy a fully preassembled converter from me here.
15 - https://geekhack.org/index.php?topic=72052.0
17 ### Arduino Leonardo + USB Host Shield
18 Buying Arduino Leonardo and USB Host Shield.
20 - https://store.arduino.cc/usa/leonardo
21 - https://store.arduino.cc/usa/arduino-usb-host-shield
22 - https://www.sparkfun.com/products/9947
29 $ git clone https://github.com/tmk/tmk_keyboard.git
32 $ git submodule update
33 $ cd converter/usb_usb
36 And Program converter. Push button on TMK converter and just run this.
41 In case of Leonardo push reset button then run command. Serial port name(COM17) depends your system. On Linux I got /dev/ttyACM0.
43 $ DEV=COM17 make program
45 $ avrdude -patmega32u4 -cavr109 -b57600 -Uflash:w:usb_usb.hex -PCOM17
51 Only supports 'HID Boot protocol'.
53 Note that the converter can host only USB "boot protocol" keyboard(6KRO), not NKRO, it is possible to support NKRO keyboard but you will need to write HID report parser for that. Every NKRO keyboard can have different HID report and it is difficult to support all kind of NKRO keyboards in the market.
59 You can editor keymap and download firmware with web brwoser.
61 - http://www.tmk-kbd.com/tmk_keyboard/editor/unimap/?usb_usb
67 - 2014/12/11 Added Hub support(confirmed with HHKB pro2)
68 - 2016/09/10 Unimap editor support
69 - 2016/10/18 Fix LED state at startup
70 - 2017/05/xx Fix startup code for FC660C(3eae475)
71 - 2018/02/xx Add Korean and Brazilian specific keys(ab6ddac,b2fa0ffa)
72 - 2018/07/xx Fix startup issue(c2ce617)
73 - 2018/10/xx Use fixed LUFA stack and update USB_Host_Shield_2.0
74 - 2019/09/18 Add BTLD(bootlader jump) key to unimap
80 ### USB Host Sheild 2.0
81 - https://www.circuitsathome.com/products-page/arduino-shields/usb-host-shield-2-0-for-arduino
83 ### USB Host Sheild 2.0 source
84 - https://github.com/felis/USB_Host_Shield_2.0
86 ### Arduino USB Host Shield(with bootst converter)
87 - http://arduino.cc/en/Main/ArduinoUSBHostShield
90 - https://github.com/arduino/Arduino/hardware/arduino/{cores,variants}
92 ### Arduino-based hardware keyboard remapper - Colemak forum
93 - http://forum.colemak.com/viewtopic.php?id=1561
95 ### Teensy + Host Shield
96 - http://www.pjrc.com/teensy/td_libs_USBHostShield.html