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karlospv94

Member

Registered: 2016-10-12

Posts: 101

Udev rule to capture event from headphones

I have bluetooth headphones that I want to capture an event from. So I have run evtest to see what key corresponds to the button I want to capture:

Input driver version is 1.0.1
Input device ID: bus 0x5 vendor 0x54c product 0xd58 version 0x250
Input device name: "WH-1000XM4 (AVRCP)"
Supported events:
  Event type 0 (EV_SYN)
  Event type 1 (EV_KEY)
    Event code 2 (KEY_1)
    Event code 3 (KEY_2)
    Event code 4 (KEY_3)
    Event code 5 (KEY_4)
    Event code 6 (KEY_5)
    Event code 7 (KEY_6)
    Event code 8 (KEY_7)
    Event code 9 (KEY_8)
    Event code 10 (KEY_9)
    Event code 11 (KEY_0)
    Event code 28 (KEY_ENTER)
    Event code 52 (KEY_DOT)
    Event code 59 (KEY_F1)
    Event code 60 (KEY_F2)
    Event code 61 (KEY_F3)
    Event code 62 (KEY_F4)
    Event code 63 (KEY_F5)
    Event code 64 (KEY_F6)
    Event code 65 (KEY_F7)
    Event code 66 (KEY_F8)
    Event code 67 (KEY_F9)
    Event code 103 (KEY_UP)
    Event code 105 (KEY_LEFT)
    Event code 106 (KEY_RIGHT)
    Event code 108 (KEY_DOWN)
    Event code 113 (KEY_MUTE)
    Event code 114 (KEY_VOLUMEDOWN)
    Event code 115 (KEY_VOLUMEUP)
    Event code 138 (KEY_HELP)
    Event code 139 (KEY_MENU)
    Event code 163 (KEY_NEXTSONG)
    Event code 165 (KEY_PREVIOUSSONG)
    Event code 166 (KEY_STOPCD)
    Event code 167 (KEY_RECORD)
    Event code 168 (KEY_REWIND)
    Event code 171 (KEY_CONFIG)
    Event code 174 (KEY_EXIT)
    Event code 200 (KEY_PLAYCD)
    Event code 201 (KEY_PAUSECD)
    Event code 208 (KEY_FASTFORWARD)
    Event code 353 (KEY_SELECT)
    Event code 356 (KEY_POWER2)
    Event code 358 (KEY_INFO)
    Event code 362 (KEY_PROGRAM)
    Event code 364 (KEY_FAVORITES)
    Event code 395 (KEY_LIST)
    Event code 398 (KEY_RED)
    Event code 399 (KEY_GREEN)
    Event code 400 (KEY_YELLOW)
    Event code 401 (KEY_BLUE)
    Event code 402 (KEY_CHANNELUP)
    Event code 403 (KEY_CHANNELDOWN)
    Event code 405 (KEY_LAST)
  Event type 2 (EV_REL)
Key repeat handling:
  Repeat type 20 (EV_REP)
    Repeat code 0 (REP_DELAY)
      Value    300
    Repeat code 1 (REP_PERIOD)
      Value     33
Properties:
Testing ... (interrupt to exit)
Event: time 1722941506.581347, type 1 (EV_KEY), code 201 (KEY_PAUSECD), value 1

The code I want to capture is 201. This is the udev rule I have written in /etc/udev/rules.d/98-bluetooth-button.rules:

SUBSYSTEM=="input", ATTRS{phys}=="64:79:f0:aa:e5:ff", ENV{EVDEV_ABS}=="201", RUN+="/usr/local/bin/mute-mic.sh"

This udev rule works if I remove the ENV{EVDEV_ABS}=="201" statement, but it doesn't work as I pasted it.

Can someone guide me to make it to work? Thanks!