#include<LiquidCrystal.h>
int vin=A5;

int t=1;
int u=6;
int v=7;
int w=8;
int x=9;
int y=10;
int z=13;

int at;
int au;
int av;
int aw;
int ax;
int ay;
int az;
int a;
double vx;
float rx;
double i;
LiquidCrystal lcd(12, 11, 5, 4, 3, 2);
void setup()
{
pinMode(vin,INPUT);
lcd.begin(16,2);

pinMode(t,OUTPUT);
pinMode(u,OUTPUT);
pinMode(v,OUTPUT);
pinMode(w,OUTPUT);
pinMode(x,OUTPUT);
pinMode(y,OUTPUT);
pinMode(z,OUTPUT);

digitalWrite(t,LOW);
digitalWrite(u,LOW);
digitalWrite(v,LOW);
digitalWrite(w,LOW);
digitalWrite(x,LOW);
digitalWrite(y,LOW);
digitalWrite(z,LOW);
}
void loop()
{

digitalWrite(t,HIGH);
digitalWrite(u,LOW);
digitalWrite(v,LOW);
digitalWrite(w,LOW);
digitalWrite(x,LOW);
digitalWrite(y,LOW);
digitalWrite(z,LOW);
delay(100);
at=analogRead(vin);




digitalWrite(t,LOW);
digitalWrite(u,HIGH);
digitalWrite(v,LOW);
digitalWrite(w,LOW);
digitalWrite(x,LOW);
digitalWrite(y,LOW);
digitalWrite(z,LOW);
delay(100);
au=analogRead(vin);
digitalWrite(t,LOW);
digitalWrite(u,LOW);
digitalWrite(v,HIGH);
digitalWrite(w,LOW);
digitalWrite(x,LOW);
digitalWrite(y,LOW);
digitalWrite(z,LOW);
delay(100);
av=analogRead(vin);



digitalWrite(t,LOW);
digitalWrite(u,LOW);
digitalWrite(v,LOW);
digitalWrite(w,HIGH);
digitalWrite(x,LOW);
digitalWrite(y,LOW);
digitalWrite(z,LOW);
delay(100);
aw=analogRead(vin);


digitalWrite(t,LOW);
digitalWrite(u,LOW);
digitalWrite(v,LOW);
digitalWrite(w,LOW);
digitalWrite(x,HIGH);
digitalWrite(y,LOW);
digitalWrite(z,LOW);
delay(100);
ax=analogRead(vin);


digitalWrite(t,LOW);
digitalWrite(u,LOW);
digitalWrite(v,LOW);
digitalWrite(w,LOW);
digitalWrite(x,LOW);
digitalWrite(y,HIGH);
digitalWrite(z,LOW);
delay(100);
ay=analogRead(vin);



digitalWrite(t,LOW);
digitalWrite(u,LOW);
digitalWrite(v,LOW);
digitalWrite(w,LOW);
digitalWrite(x,LOW);
digitalWrite(y,LOW);
digitalWrite(z,HIGH);
delay(100);
az=analogRead(vin);

if(az>=450)
{
vx=az*0.00489;
i=(5-vx-0.55)/22000;
rx=(vx/i);
}
if(ay>=450 && az<450)
{
vx=ay*0.00489;
i=(5-vx-0.55)/10000;
rx=(vx/i);
}
if(ax>=448 && ay<448 && az<448)
{
vx=ax*0.00489;
i=(5-vx-0.55)/4700;
rx=(vx/i);
}

if(aw>=439 && ax<439 && ay<439 && az<439)
{
vx=aw*0.00489;
i=(5-vx-0.55)/2200;
rx=(vx/i);
}

if(av>=439 && aw<439 && ax<439 && ay<439 && az<439)
{
vx=av*0.00489;
i=(4.8-vx-0.55)/1000;
rx=(vx/i);
}

if(au>=430 && av<430 && aw<430 && ax<430 && ay<430 && az<430)
{
vx=au*0.00489;
i=(4.5-vx-0.55)/560;
rx=(vx/i);
}

if(at>=430 && au<430 && av<430 && aw<430 && ax<430 && ay<430 && az<430 )
{
vx=at*0.00489;
i=(4.5-vx-0.55)/220;
rx=(vx/i);
}

if(at<430 && au<430 && av<430 && aw<430 && ax<430 && ay<430 && az<430 )
{
vx=at*0.00489;
i=(4.5-vx-0.55)/220;
rx=(vx/i);
}
lcd.setCursor(0,0);

if(vx>4.8)
{
lcd.clear();
lcd.setCursor(0,0);
lcd.print("----INFINITY----");
}
else
{
if(rx<1000)
{
lcd.clear();
lcd.setCursor(0,0);
lcd.print(rx);
lcd.setCursor(7,0);
lcd.print((char)244);
}
else
{
lcd.clear();
rx=rx/1000;
lcd.setCursor(0,0);
lcd.print(rx);
lcd.setCursor(6,0);
lcd.print("k");
lcd.print((char)244);
}
}
lcd.setCursor(0,1);
lcd.print("Arduino Ohmmeter");
}