Can I make web interface for hardware events?

Using your keypad, you can give code below (as well attached) a shot. In your case, the use of pins for driving and sensing a 3x2 = max 6 buttons and using only 4 of the 6 options while consuming 5 GPIO pins is not the most effective use of anyway already sparce resources... to say the least. You may consider an SPI or I2C driven port extender that uses max 3 GPIO pins for 8, 16, 24, 32,... estended pins...

// Modue for Drive/Sense Multiplexed Keypad
//
// - supports any number of driving pins (rows)
// - supports any number of sensing pins (cols)
// - has enable(true/false) for controlled actions
// - callback called w/ button # 0,1,2,3,... and time
// - optional:
//   - start disabled vs. default enabled (eval boolean)
//   - driving high/watch_rising vs. default low/falling
//   - custom debounce vs. 200[ms] default (and minimum)
//
//
// Note: momentary-on push switches connect rows w/ cols
//
// Example: Keypad controlling AC (pins Espruino Pico)
//
// \    sense 
//   \  pins: pin B1   pin B10
//     \       |        |        
// drive \     |        |
// pins:   \   |        |
//           \ |        |
// pin B13 ----0:pwr----1:------ pwr on/off(toggle), N/C
//             |        |
// pin B14 ----2:tDwn---3:tUp--- target temp down  , up
//             |        |
// pin B15 ----4:fan----5:------ fan on/off(toggle), N/C
//             |        |

var keypadModule = (function(){

  var Keypad = function(dps,sps,cb,e,p,d) {
    this.dps = dps;
    this.sps = sps;
    this.cb = cb;
    this.p = p;
    this.d = d;
    this.e = e;
    this.pl = (p === "up") ? 1 : 0;
    this.np = 0;
    this.ws = null;
  }, p = Keypad.prototype;

  p.init = function(_this) {
    this.sps.forEach(function(sp,i){
      pinMode(sp,"input_pull" + _this.p);
    });
    this.drive(this);
    this.watch(this);
  };
  p.drive = function(_this){
    this.dps.forEach(function(dp){
      pinMode(dp,"output");
      digitalWrite(dp,1 - _this.p);
    });
  };
  p.watch = function(_this){
    this.ws = [];
    this.sps.forEach(function(sp,i){ var si = i;
      _this.ws.push( setWatch( 
            function(ep){ _this.scan(si,ep.time); }
          , sp
          , { repeat: false
            , edge: (_this.pl) ? "falling" : "rising"
            , debounce: _this.d } ) );
    });
    this.w = true;
  };
  p.scan = function(si,tp) {
    if (dbg) log(tp - this.np);
    this.ws.forEach(function(w,i){ clearWatch(w); });
    if (this.e && (tp > this.np)) {
      this.dps.forEach(function(dp){ pinMode(dp,"input"); });
      var b = -1, di, dl = this.dps.length, dp;
      var sp = this.sps[si], s = 1 - this.pl;
      for (di = 0; di < dl; di++) { 
        if (dbg) log("scan si: ",si," - di: ", di, " - s: ", s); 
        pinMode(dp = this.dps[di],"output");
        if (digitalRead(sp) === s) {
          b = di * this.sps.length + si; dl = 0;
        } pinMode(dp,"input");
      } this.drive(this); this.watch(this);
      this.np = getTime() + (this.d / 100);
      if (b >= 0) { this.cb(b,tp); } 
    } else { this.watch(this); }
  };

  p.enable = function(e) { this.e = !!e; };

  return ({connect:function(
     drivePins  // array of drive pins 
    ,sensePins  // array of sense pins;
    ,callback   // callback acceptin button # 0,1,2,...
    ,enabled    // optional, default = true
    ,pull       // optional, default = "up"
    ,debounce   // optional, default = 200, min = 200, [ms]
    ){
      var kp = new Keypad(drivePins,sensePins,callback
        , !enabled
        , ((pull === "up") ? pull : (pull === "down") ? pull : "up")
        , (    (isNaN(debounce)
            || ((debounce * 1) < 200)
          ) ? 200 : debounce * 1) );
       kp.init(kp);
       return kp;
  }});
})();

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

// var keypad = require("KeypadMDS").connect(
var keypad = keypadModule.connect(
    [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] );
  }); 

1 Attachment

• AC08Keypad.js