#include <Ultrasonic.h>





volatile float maxfrontdistance = 15.00;
volatile float maxleftdistance = 10.00 , maxrightdistance = 10.00;
volatile float leftdistance, frontdistance, rightdistance;
bool Leftclear, Frontclear, Rightclear;

Ultrasonic USleft(3, 10);
Ultrasonic USfront(6, 11);
Ultrasonic USright(5, 9);

void setup(){
  Serial.begin(9600);
}

void loop(){
  checkfrontdistance();
  checkleftdistance();
  checkrightdistance();

if(!Leftclear){
Serial.print("Left not clear");
}




  delay(2000);

}




void checkleftdistance() {
  Serial.print("Left:");
  leftdistance = USleft.distanceRead();
  if (leftdistance>maxleftdistance)
  (Leftclear = true);
  Serial.print(USleft.distanceRead());
  Serial.println("cm");
}

void checkfrontdistance() {
  Serial.print("Front:");
  frontdistance = USfront.distanceRead();
  if (frontdistance>maxfrontdistance)
  (Frontclear = true);
  Serial.print(USfront.distanceRead());
  Serial.println("cm");


}

void checkrightdistance() {
  Serial.print("Right:");
  rightdistance = USright.distanceRead();
  if (rightdistance>maxrightdistance)
  (Rightclear = true);
  Serial.print(USright.distanceRead());
  Serial.println("cm");


}