Arduino Servo, RFID, Potensio

#define LED_PIN 13
#include <SoftwareSerial.h>

#include <Servo.h>  // Servo PIN 6 Digital
Servo servo1;

int PinTimbangan = A0;    // Pin Sensor Timbangan di A0
int NilaiTimbangan = 0;  // Nilai Awal Timbangan

SoftwareSerial RFID(2, 3);
String Teks;
String TeksCek;
char c;
void setup()
{

Serial.begin(9600);
RFID.begin(9600);
     Serial.println("Mulai");
  servo1.attach(6); // Pin Servo di Digital 6
  servo1.writeMicroseconds(1500);
  tutuppalang1();

pinMode(LED_PIN, OUTPUT); //Sets LED pin as output
digitalWrite(LED_PIN, LOW); //Turn off LED
}


void loop()
{
    NilaiTimbangan = analogRead(PinTimbangan);
    while(RFID.available()>0){
    delay(5);
    digitalWrite(LED_PIN, HIGH); //Turn on LED
    c=RFID.read();
    Teks += c;
  }
  if(Teks.length()>10) Cek();
Teks="";

}

void Cek()
{
Teks=Teks.substring(1,11);
 if (TeksCek != Teks) {
    NilaiTimbangan = analogRead(PinTimbangan);
    Serial.print("Tag:");
    Serial.print(Teks);
    Serial.print("Timbangan:");
    Serial.println(NilaiTimbangan);
    digitalWrite(LED_PIN, LOW); //Turn off LED
    TeksCek = Teks;
    bukapalang1();

  }
}


void bukapalang1()
{
     servo1.write(90);  // Turn Servo Left to 45 degrees
     delay(3000);
     tutuppalang1();
}
void tutuppalang1()
{
     servo1.write(180);  // Turn Servo Left to 45 degrees
     delay(1000);
}