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Dobrica Pavlinušić's random unstructured stuff
Logitech K400r
Very lousy plastic, space bar generated clunk, clunk sound, but otherwise nice wireless keyboard if you don't care much about quality of plastic. Protocol documentation
Linux software
dpavlin@blue:/rest/cvs/Solaar$ sudo ./bin/solaar show
Unifying Receiver
Device path : /dev/hidraw3
USB id : 046d:c52b
Serial : 656F91A9
Firmware : 12.01.B0019
Bootloader : 02.14
Has 1 paired device(s) out of a maximum of 6.
Notifications: (none)
Device activity counters: 1=2
1: Wireless Touch Keyboard K400
Codename : K400
Kind : keyboard
Wireless PID : 4024
Protocol : HID++ 2.0
Polling rate : 8 ms (125Hz)
Serial number: AC5F5069
Firmware: RQK 50.01.B0013
The power switch is located on the edge of top right corner.
Supports 22 HID++ 2.0 features:
0: ROOT {0000}
1: FEATURE SET {0001}
2: FEATURE INFO {0002}
3: DEVICE FW VERSION {0003}
4: DEVICE NAME {0005}
5: BATTERY STATUS {1000}
6: REPROG CONTROLS {1B00}
7: REPROG CONTROLS V3 {1B03}
8: WIRELESS DEVICE STATUS {1D4B}
9: unknown:1DF0 {1DF0} hidden
10: unknown:1DF3 {1DF3} internal, hidden
11: unknown:1E00 {1E00} hidden
12: VERTICAL SCROLLING {2100}
13: HI RES SCROLLING {2120}
14: MOUSE POINTER {2200}
15: FN INVERSION {40A0}
16: NEW FN INVERSION {40A2}
17: ENCRYPTION {4100}
18: KEYBOARD LAYOUT {4520}
19: TOUCHPAD FW ITEMS {6010}
20: TOUCHPAD SW ITEMS {6011}
21: TOUCHPAD WIN8 FW ITEMS {6012}
Has 18 reprogrammable keys:
0: SHOW DESKTOP => ShowDesktop is FN, reprogrammable
1: METRO APPSWITCH => MetroAppSwitch is FN, reprogrammable
2: METRO SEARCH => MetroSearch is FN, reprogrammable
3: METRO SHARE => MetroShare is FN, reprogrammable
4: METRO DEVICES => MetroDevices is FN, reprogrammable
5: METRO SETTINGS => MetroSettings is FN, reprogrammable
6: Previous => Previous is FN
7: Play/Pause => Play/Pause is FN
8: Next => Next is FN
9: Mute => Mute is FN
10: Volume Down => Volume Down is FN
11: Volume Up => Volume Up is FN
12: MEDIA PLAYER => Music nonstandard, reprogrammable
13: Lock PC => WindowsLock nonstandard, reprogrammable
14: SLEEP => Sleep nonstandard, reprogrammable
15: LEFT CLICK => LeftClick mse
16: LEFT CLICK => LeftClick mse
17: RIGHT CLICK => RightClick mse
Battery: 90%, discharging.
Firmware update under Linux
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