Keypad - bought or DIY - controlled directly by Espruino

Sample output from KeypadMDS_Inline.js code (with AC control application in mind that toggles power and fan and 'ups' and 'down' temperature):

 _____                 _
|   __|___ ___ ___ _ _|_|___ ___
|   __|_ -| . |  _| | | |   | . |
|_____|___|  _|_| |___|_|_|_|___|
          |_| http://espruino.com
 1v80 Copyright 2015 G.Williams
>echo(0);
=undefined
949377234.41604518890
scan si: 0 - di: 0 - s: 0
949377234.41604518890: Button # 0 pressed: pwr toggle
4.81315994262
scan si: 0 - di: 0 - s: 0
scan si: 0 - di: 1 - s: 0
949377241.43724060058: Button # 2 pressed: temp down
-1.82220757007
2.95375728607
scan si: 0 - di: 0 - s: 0
scan si: 0 - di: 1 - s: 0
scan si: 0 - di: 2 - s: 0
949377246.60013008117: Button # 4 pressed: fan toggle
6.82493495941
scan si: 0 - di: 0 - s: 0
scan si: 0 - di: 1 - s: 0
949377255.63546943664: Button # 2 pressed: temp down
78.17845439910
scan si: 1 - di: 0 - s: 0
scan si: 1 - di: 1 - s: 0
949377336.02310276031: Button # 3 pressed: temp up
-1.92238414287
2.93543815612
scan si: 1 - di: 0 - s: 0
949377341.16769027709: Button # 1 pressed: N/C
0.59415245056
scan si: 1 - di: 0 - s: 0
scan si: 1 - di: 1 - s: 0
scan si: 1 - di: 2 - s: 0
949377343.96973037719: Button # 5 pressed: N/C
> 

Noteworthy are lines with the negative numbers: Events in espruino are queued.... and with a lousy switch - I just used I wire to touch a Espruino Pico castellation pad which produced a lot of queud events... interestingly not on the touch, but on the 'move away' which then on scan did not show any buttons pressed. Therefore, .np - earliest / Next allowed Press time is set - with current time plus set debounce time - and checked to filter and ignore these events. It helos avoid faulty callbacks for now, but I'm not settled on it it yet. There must be a better approach... I hope.

Verified module usage with this code:

var dbg = true;
var log = function() { console.log(arguments.join("")); };

// var keypad = keypadModule.connect( // for inline use
var keypad = require("KeypadMDS").connect( // for module use
    [B13,B14,B15], [B1,B10], function(btn,tme){ // 0,1,2,3...
      if (dbg) log("" + tme + ": Button # ",btn," pressed: "
          , [ "pwr toggle","N/C"
            , "temp down" ,"temp up"
            , "fan toggle","N/C"
            ][btn] );
  });

Producing this output:

 _____                 _
|   __|___ ___ ___ _ _|_|___ ___
|   __|_ -| . |  _| | | |   | . |
|_____|___|  _|_| |___|_|_|_|___|
          |_| http://espruino.com
 1v80 Copyright 2015 G.Williams
>echo(0);
=undefined
949385591.92534446716: Button # 3 pressed: temp up
949385600.08324909210: Button # 5 pressed: N/C
949385630.64551258087: Button # 0 pressed: pwr toggle
949385633.89211368560: Button # 2 pressed: temp down
949385641.41957569122: Button # 0 pressed: pwr toggle
949385645.01201820373: Button # 4 pressed: fan toggle
>