Buttons

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The button feature makes it easier to work with buttons, when compared to reading a digital pin for example.

This feature is not available on all pins. However, Digital Read can be used instead, which is available on all pins. DUELink Spider supports Button on pins 1,2,3,4 plus buttons 'A' and 'B'.

Tip

The timeout for Button Down and Button Up are fixed to two seconds. Calling after two seconds from last press or release returns 0.

• Button.Enable(pin, enable) - Activates a pin to be used as a button
  pin: Pin number
  enable: True = enable, false = disabled
  

• Button.JustReleased(pin)
  pin: Pin number
  Returns: True after release first time called. If called again returns false
  

• bool Button.JustPressed(pin) - Checks if a button was pressed
  pin: Pin number
  Returns: True if button was pressed recently and continues to return 1 until the button is released

This example checks button 'a'.

• Python
• JavaScript
• .NET

duelink.Button.Enable('a', True);

while True:
    d = duelink.Button.JustPressed('a')
    u = duelink.Button.JustReleased('a')

    if (d):    
        print("Button A down")
    
    if (u):    
        print("Button A up")
    
    time.sleep(0.2);