I own a basic footpedal with two buttons, which I would like to set up to mimic Control and Super.
I've used xmodmap and xev before, as suggested in this answer here.
But it turns out that the buttons of the footpedal are mapped to a and c at the moment and the system can't distinguish between the input from the pedal and the keyboard. So when I remap a to Control, it also remaps my keyboard. (I work on a Laptop with an external keyboard attached)
Below you can find the output of xev both for the external keyboard and from the footpedal. Any Ideas? :)
Keyboard a
KeyPress event, serial 37, synthetic NO, window 0x5400001,
root 0xd8, subw 0x0, time 2976167, (-463,316), root:(561,368),
state 0x10, keycode 38 (keysym 0x61, a), same_screen YES,
XLookupString gives 1 bytes: (61) "a"
XmbLookupString gives 1 bytes: (61) "a"
XFilterEvent returns: False
KeyRelease event, serial 37, synthetic NO, window 0x5400001,
root 0xd8, subw 0x0, time 2976232, (-463,316), root:(561,368),
state 0x10, keycode 38 (keysym 0x61, a), same_screen YES,
XLookupString gives 1 bytes: (61) "a"
XFilterEvent returns: False
Footpedal a
KeyPress event, serial 37, synthetic NO, window 0x5400001,
root 0xd8, subw 0x0, time 3114112, (-172,78), root:(852,130),
state 0x10, keycode 38 (keysym 0x61, a), same_screen YES,
XLookupString gives 1 bytes: (61) "a"
XmbLookupString gives 1 bytes: (61) "a"
XFilterEvent returns: False
KeyRelease event, serial 37, synthetic NO, window 0x5400001,
root 0xd8, subw 0x0, time 3114408, (-172,78), root:(852,130),
state 0x10, keycode 38 (keysym 0x61, a), same_screen YES,
XLookupString gives 1 bytes: (61) "a"
XFilterEvent returns: False
