void setup() {
  Serial.begin(9600);
  delay(20);
  Serial.println("Enter the value  W+00005+0000718FF ");
}
void loop() {
  if (Serial.available()) {
    String input_string = Serial.readString();
    String input_value = input_string.substring(2, 7); // starts at index 2 and ends at index 7
    //input_value.toInt();
    Serial.print("Input value: ");
    Serial.println(input_value);
  }
}