external button puckjs

@user140111

Wire things up as shown in attached picture and use two no-repeat setWatch(...) on pin D1 initialized with pinMode(D1,"input_pullup") . Setup first watch with edge:"falling" to take the time with t0 = getTime() and setup of second watch with edge:"rising" with taking the time again ( t1 ) and re-setup first watch. Regarding the debounce time, you have to play a bit. In second watch you also calculate the difference of both times taken and show it somehow... for example by blinking as many seconds the button has been held. If it is a long time, you may use a green blinks for the tens of seconds and red blinks for the ones of seconds... ;-)

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