Button subscription

Use the button module to subscribe to button events.

Code

import lightbug.devices as devices
import lightbug.messages as messages

main:
  device := devices.I2C --background=false
    
  device.buttons.subscribe --timeout=null --callback=(:: |button-data/messages.ButtonPress|
    button-name := messages.ButtonPress.button-id-from-int button-data.button-id
    print "Button pressed: $button-name (ID: $button-data.button-id) for $button-data.duration ms"
  )

examples/modules/buttons/basic.toit in lightbug-io/toit-lightbug

Input

Press the right button a few times.

Result

This example only logs button presses to the console.

Console

Button pressed: Right Down (ID: 2) for 686 ms
Button pressed: Right Down (ID: 2) for 105 ms
Button pressed: Right Down (ID: 2) for 127 ms
Button pressed: Right Down (ID: 2) for 121 ms
Button pressed: Right Down (ID: 2) for 145 ms
Button pressed: Right Down (ID: 2) for 107 ms
Button pressed: Right Down (ID: 2) for 1113 ms
Button pressed: Right Down (ID: 2) for 2277 ms