virtual device has no buttons/axes

[nonchip]

Hardware:

• Logitech Extreme 3d Pro (046d:c215 according to lsusb)
• unnamed "hama" brand USB keypad (/dev/input/by-id/usb-05d5_KEYBOARD-event-kbd according to lsing that folder before and after plugging it in and looking what appeared)

Script:

devices = {
  d0 = {
    vendorid = 0x046d,  -- Logitech
    productid = 0xc215, -- Extreme 3D Pro
  },
  kbd0 = "/dev/input/by-id/usb-05d5_KEYBOARD-event-kbd", -- hama keypad
}

local d0buttons = { -- according to evtest
  BTN_TRIGGER,
  BTN_THUMB,
  BTN_THUMB2,
  BTN_TOP,
  BTN_TOP2,
  BTN_PINKIE,
  BTN_BASE,
  BTN_BASE2,
  BTN_BASE3,
  BTN_BASE4,
  BTN_BASE5,
  BTN_BASE6
}

local d0axes = { -- according to evtest
  ABS_X, ABS_Y, ABS_RZ,
  ABS_THROTTLE,
  ABS_HAT0X, ABS_HAT0Y
}

local kpkeys = { -- according to looking at it
       KEY_KPSLASH, KEY_KPASTERISK,
  KEY_KP7, KEY_KP8, KEY_KP9, KEY_KPMINUS,
  KEY_KP4, KEY_KP5, KEY_KP6, KEY_KPPLUS,
  KEY_KP1, KEY_KP2, KEY_KP3, KEY_KPENTER,
  KEY_KP0,          KEY_KPDOT
}

-- making inverse lookup tables
local d0buttonsinv = {}
local d0axesinv = {}
local kpkeysinv = {}
for i=1,#d0buttons do
  d0buttonsinv[d0buttons[i]] = i
end
for i=1,#d0axes do
  d0axesinv[d0axes[i]] = i
end
for i=1,#kpkeys do
  kpkeysinv[kpkeys[i]] = i
end

v_devices = {
  v0 = {
    buttons = #d0buttons + #kpkeys,
    axes = #d0axes
  }
}

-- make button events starting with TRIGGER_HAPPY1
function kbd0_pressed(value)
  local i = kpkeysinv[value]
  if i then
    send_button_event(0,BTN_DEAD+i,1)
  end
end
function kbd0_released(value)
  local i = kpkeysinv[value]
  if i then
    send_button_event(0,BTN_DEAD+i,0)
  end
end

-- forward buttons
for i=1,#d0buttons do
  _ENV["d0_b"..d0buttons[i].."_event"] = function (value)
    send_button_event(0,d0buttons[i],value)
  end
end

-- forward axes
for i=1,#d0axes do
  _ENV["d0_a"..d0axes[i].."_event"] = function (value)
    send_axis_event(0,d0axes[i],value)
  end
end

What I Expected:

A WeJoy Virtual Device 0 with combined buttons from joystick+keypad and the axes from the keypad (essentially extending the available joystick buttons using the keypad).

What I get instead:

wejoy:

$ sudo wejoy logitechPlusNumpad.lua
WeJoy v0.2 by Johannes Bergmark
Successfully created virtual device 0.
Successfully created virtual keyboard device.
Press 'q' and then 'ENTER' to quit!
[it does NOT react to `q\n`!]

evtest:

$ sudo evtest                      
No device specified, trying to scan all of /dev/input/event*
Available devices:
[...]
/dev/input/event29:	WeJoy Virtual Device 0
/dev/input/event30:	WeJoy Virtual Keyboard
Select the device event number [0-30]: 29
Input driver version is 1.0.1
Input device ID: bus 0x6 vendor 0x0 product 0x0 version 0x1
Input device name: "WeJoy Virtual Device 0"
Supported events:
  Event type 0 (EV_SYN)
Properties:
Testing ... (interrupt to exit)

also pressing keys on the keypad still creates X11 keyboard input events (=typing numbers).