if(Serial.available()){
    a=(int)Serial.read();
    Serial.println(a);
    if(a==49){
            on=on+potValue;
            ESC1.write(on);
            
            Serial.println("ilerle = "+String(on));
      
              }

if(Serial.available()){
    a=(int)Serial.read();
    Serial.println(a);
    if(a==49){
            on=on+potValue;
            ESC1.write(on);
            
            Serial.println("ilerle = "+String(on));
      
              }