           case 7: {
             if ((backlightIntensity - 10) >= 20) {
               backlightIntensity -= 10;
-              analogWrite(backLightPin, backlightIntensity);
+              analogWrite(BACKLIGHT_PIN, backlightIntensity);
               EEPROM.write(3, backlightIntensity);
             }
             break;

                lcd.clear();
                
                radio.setStandByOn();
                analogWrite(backLightPin, 0);
                
                isStandByOn = true;
                break; 

          case 7: {
            if ((backlightIntensity + 10) <= 255) {
              backlightIntensity += 10;
              analogWrite(BACKLIGHT_PIN, backlightIntensity);
              EEPROM.write(3, backlightIntensity);
            }
            break;
