when.js

TemperatureModule.prototype.when = function(event, callback, value) { // 'medir', callback
  temp.on('Measurement',(_value)=>{
    if(value === _value) {
       callback(); 
      //lcd.home();
      //lcd.message("Temp [C]: " + _value.toFixed(2));
    }
  });
}

params: {
  code: 'temperature.when('medir', function () {
      led.blink();
    }, 45);'
}

//server 

eval(params.code);

//prender leds
ledRGB.turnOn('led01', '#FF0000');