Working version

Main_working.ino

+const int trigPin1 = 9;
+const int echoPin1 = 8;
+
+const int trigPin2 = 6;
+const int echoPin2= 7;
+
+
+long duration1;
+long duration2;
+
+int distance1;
+int distance2;
+
+void setup() {
+  // put your setup code here, to run once:
+  pinMode(trigPin1, OUTPUT); // Sets the trigPin as an Output
+  pinMode(echoPin1, INPUT); // Sets the echoPin as an Input
+  pinMode(trigPin2, OUTPUT); // Sets the trigPin as an Output
+  pinMode(echoPin2, INPUT); // Sets the echoPin as an Input
+  Serial.begin(9600); // Starts the serial communication
+}
+
+void loop() {
+  // put your main code here, to run repeatedly:
+  digitalWrite(trigPin1, LOW);
+  delayMicroseconds(2);
+
+  digitalWrite(trigPin1, HIGH);
+  
+  delayMicroseconds(10);
+  digitalWrite(trigPin1, LOW);
+  
+  duration1 = pulseIn(echoPin1, HIGH);
+  distance1 = duration1 * 0.034/2;
+  
+  Serial.print("Sensor 1:");
+  Serial.println(distance1);
+
+
+
+  digitalWrite(trigPin2, LOW);
+  delayMicroseconds(2);
+
+  digitalWrite(trigPin2, HIGH);
+
+  delayMicroseconds(10);
+  digitalWrite(trigPin2, LOW);
+  
+
+  duration2 = pulseIn(echoPin2, HIGH);
+  distance2 = duration2 * 0.034/2;
+  
+  Serial.print("Sensor 2:");
+  Serial.println(distance2);
+
+}