Remapper for the Bluetooth (Eraser) Button of the Surface Pen

Work in progress.

The Surface Pen bluetooth-button can distinguish between three actions, which are reported as key events:

• Single-click (⌘ Meta+F20).
• Double-click (⌘ Meta+F19).
• Press and hold (⌘ Meta+F18).

This utility allows you to re-map these actions via evedev/uinput so that they can be used e.g. in presentation tools that do not allow custom keyboard shortcuts or have trouble handling the meta key. For more hardware-details, have a look at the official Windows specification page.

Configure

If you are configuring before installation: Open the file remap.conf in the folder etc and edit it:

If you are configuring after installation: Open the file remap.conf in the folder /etc/surface-pen-button/ and edit it:

The content of this file is toml syntax so keys are simple strings and actions are arrays of strings.

1. Change vendor if neccessary. You can check the vendor id of your pen by using sudo evtest and then selecting Surface Pen Keyboard. You'll find you vendor id at Input device ID after vendor.
2. Change product if neccessary. You can check the product id of your pen by using sudo evtest and then selecting Surface Pen Keyboard. You'll find you product id at Input device ID after product.
3. Change the key combinations for the actions. You have to put the keys in quotation marks (e. g. "KEY_ESC"). If you want multiple keys, you have to put a comma (, ) between them.

Available keys:

KEY_ESC
KEY_1
KEY_2
KEY_3
KEY_4
KEY_5
KEY_6
KEY_7
KEY_8
KEY_9
KEY_0
KEY_MINUS
KEY_EQUAL
KEY_BACKSPACE
KEY_TAB
KEY_Q
KEY_W
KEY_E
KEY_R
KEY_T
KEY_Y
KEY_U
KEY_I
KEY_O
KEY_P
KEY_LEFTBRACE
KEY_RIGHTBRACE
KEY_ENTER
KEY_LEFTCTRL
KEY_A
KEY_S
KEY_D
KEY_F
KEY_G
KEY_H
KEY_J
KEY_K
KEY_L
KEY_SEMICOLON
KEY_APOSTROPHE
KEY_GRAVE
KEY_LEFTSHIFT
KEY_BACKSLASH
KEY_Z
KEY_X
KEY_C
KEY_V
KEY_B
KEY_N
KEY_M
KEY_COMMA
KEY_DOT
KEY_SLASH
KEY_RIGHTSHIFT
KEY_KPASTERISK
KEY_LEFTALT
KEY_SPACE
KEY_CAPSLOCK
KEY_F1
KEY_F2
KEY_F3
KEY_F4
KEY_F5
KEY_F6
KEY_F7
KEY_F8
KEY_F9
KEY_F10
KEY_NUMLOCK
KEY_SCROLLLOCK
KEY_KP7
KEY_KP8
KEY_KP9
KEY_KPMINUS
KEY_KP4
KEY_KP5
KEY_KP6
KEY_KPPLUS
KEY_KP1
KEY_KP2
KEY_KP3
KEY_KP0
KEY_KPDOT
KEY_102ND
KEY_F11
KEY_F12
KEY_KPENTER
KEY_RIGHTCTRL
KEY_KPSLASH
KEY_SYSRQ
KEY_RIGHTALT
KEY_HOME
KEY_UP
KEY_PAGEUP
KEY_LEFT
KEY_RIGHT
KEY_END
KEY_DOWN
KEY_PAGEDOWN
KEY_INSERT
KEY_DELETE
KEY_POWER
KEY_KPEQUAL
KEY_PAUSE
KEY_LEFTMETA
KEY_RIGHTMETA
KEY_COMPOSE
KEY_F13
KEY_F14
KEY_F15
KEY_F16
KEY_F17
KEY_F18
KEY_F19
KEY_F20

4. If you are configuring after installation: Stop this program via sudo killall surface-pen-button. If you have installed the systemd service, the program will start again after 2 seconds.

Install

Run ./install.sh in this repository, then follow the instructions.

Uninstall

Run ./uninstall.sh in this repository.