   DEBUG_PRINT("   Softpot Reading: ");
   DEBUG_PRINTLN(softpotReading);
 
+  // gStart_time != 0  => user has pressed, and the detection has started
+  // (millis() - gStart_time) > gResolution)  => current time has exceeded the gResolution time from when user pressed, I saw example online which set the gResolution be 300ms, though I use 500 to capture double tap
   if (gStart_time != 0 && (millis() - gStart_time) > gResolution) {
     gState = gIDLE;
     gStart_time = 0;
+    // if now user still holds
+    // determine based on click numbers => 0: HOVER; 1:TAP; 2:D_TAP
     if (softpotReading < SOFTPOT_THREASHOLD) {
       if (clicks == 0) {
 	returnV = gHOVER;

      }
    }
    else
      returnV = gCLICK;
    clicks = 0;
    return returnV;

      *delta = (softpotReading - softpotInitV) / delta_threshold;
    }
    else {
      // only add to click when state goes from PRESS to RELEASE
      gState = gRELEASE;
      clicks++;
    }
