HEY! I was trying to get 2 HC-SR04 to work together, such that i get the average of the 2 readings. but it doesnt work as expected and only displays 'OUT OF RANGE' on serial monitor. please help Answered

this is my code:

#define echo2 8
#define trig2 9

#define LED1 2 // LED pin 2

#define echo 13 //ECHO pin 13

#define trig 10 //TRIG pin 10

float duration, distance, duration2, distance2, avg; //float command helps us to determine value of duration and distance in decimals

void setup() {

Serial.begin (9600); // setup ¯\_(ツ)_/¯

pinMode (echo, INPUT);

pinMode (trig, OUTPUT);

pinMode (LED1, OUTPUT);

pinMode (echo2, INPUT);

pinMode (trig2, OUTPUT);

}

void loop() {

digitalWrite (LED1, LOW);

digitalWrite (trig, LOW);

digitalWrite (trig2, LOW);

delayMicroseconds (2);

digitalWrite (trig, HIGH);

digitalWrite (trig2, HIGH);

delayMicroseconds (10);

digitalWrite (trig, LOW);

digitalWrite (trig2, LOW);

duration = pulseIn(echo ,HIGH);

duration2 = pulseIn(echo2 , HIGH);

distance = (duration/2) * 0.0343;

distance2 = (duration2/2) * 0.0343;

avg = (distance2/2 + distance/2);

Serial.print ("Distance = ");

if (avg>=400 || avg<=2) { // the formula of distance is duration of impulse divided by 2 multipled by speed of light in air meter per sec

Serial.println ("OUT OF RANGE");

digitalWrite (LED1, HIGH);

delay(50);

digitalWrite(LED1,LOW);

}

else {

Serial.print (avg);

Serial.println("cm");

delay (150);

}

delay (150);

}