int raw1 = 0;
int Vin1 = 3.3;
float Vout1 = 0;
int analogPin0 = A3;

/*int analogPin1 = A0;    //find medium R
int analogPin2 = A1;    //find high R
int analogPin3 = A2;   //find low R*/

int analogPin4 = A0; // all R

int raw = 0;
int Vin = 5;
float Vout = 0;

float RH = 100000;  //find high R
float RM = 1000;    // find medium R
float RL = 50;        //  find low R

float R2 = 0 ;
float buffer = 0;
void setup() {
  Serial.begin(9600);
  Serial.println("serect chanel ");
  pinMode(11, OUTPUT);
  pinMode(12, OUTPUT);
  pinMode(13, OUTPUT);
}

void loop() {
  raw1 = analogRead(analogPin0);
  Vout1 = (raw1 * Vin1)/1024.0;
  
  
 { if(Vout1<1.1){
    digitalWrite(13, HIGH);
    digitalWrite(12, LOW);
    digitalWrite(11, LOW);
    delay(1000);
    raw = analogRead(analogPin4);
    Vout = (raw * Vin)/1024.0;
    buffer= (Vin/(Vin-Vout))-1;
    R2= RL * buffer;
      if(Vout==0){
        Serial.println("short circuit");
      }
      else if(Vout<=4.95){
       Serial.print("Vout: ");
       Serial.println(Vout);
       Serial.print("R2: ");
       Serial.println(R2);}
      else if (Vout>4.95){
        Serial.println("over load");
      }
    
    Serial.println("low chanel");
    Serial.println(" ");
  }
    
       
  else if(Vout1<2.2){
    digitalWrite(13, LOW);
    digitalWrite(12, HIGH);
    digitalWrite(11, LOW);
    delay(1000);
    raw = analogRead(analogPin4);
    Vout = (raw * Vin)/1024.0;
    buffer= (Vin/(Vin-Vout))-1;
    R2= RM * buffer;
    if(Vout==0){
        Serial.println("short circuit");
      }
      else if(Vout<=4.95){
       Serial.print("Vout: ");
       Serial.println(Vout);
       Serial.print("R2: ");
       Serial.println(R2);}
      else if (Vout>4.95){
        Serial.println("over load");
      }
    
      Serial.println("Medium chanel");
    Serial.println(" ");
  }
  else {
    digitalWrite(13, LOW);
    digitalWrite(12, LOW);
    digitalWrite(11, HIGH);
    delay(1000);
    raw = analogRead(analogPin4);
    Vout = (raw * Vin)/1024.0;
    buffer= (Vin/(Vin-Vout))-1;
    R2= RH * buffer;
    if(Vout==0){
        Serial.println("short circuit");
      }
      else if(Vout<=4.95){
       Serial.print("Vout: ");
       Serial.println(Vout);
       Serial.print("R2: ");
       Serial.println(R2);}
      else if (Vout>4.95){
        Serial.println("over load");
      }
    
     Serial.println("Hight chanel");
    Serial.println(" ");
  }}
   //Serial.println(Vout1);
   delay(1000);
   
}