Hello,
I have been using this ultrasonic sensor to measure distance over the past 3 weeks. The sensor has been working fine. Usually, when I connect pins to the sensor from my arduino(5V, Trigger, Echo, and GND), a red LED in between R20 and R10 usually stays lit during operation. When I connect it now, the red Led blinks now. However, I am no longer obtaining readings. In fact my measurements read "Distance: 0 Feet".
Does anyone know how to fix this problem?
Here is my code.
#define trigPin 7
#define echoPin 10
// Define variables:
long duration;
int distance;
void setup() {
// Define inputs and outputs
pinMode(trigPin, OUTPUT);
pinMode(echoPin, INPUT);
// Begin Serial communication at a baudrate of 9600:
Serial.begin(9600);
}
void loop() {
// Clear the trigPin by setting it LOW:
digitalWrite(trigPin, LOW);
delayMicroseconds(100);
// Trigger the sensor by setting the trigPin high for 10 microseconds:
digitalWrite(trigPin, HIGH);
delayMicroseconds(20);
digitalWrite(trigPin, LOW);
// Read the echoPin. pulseIn() returns the duration (length of the pulse) in microseconds:
duration = pulseIn(echoPin, HIGH);
// Calculate the distance:
//distance = duration0.148/2;
distance = duration0.034/2;
// Print the distance on the Serial Monitor (Ctrl+Shift+M):
Serial.print("Distance = ");
Serial.print(distance);
Serial.println(" cm");
Serial.print("Distance = ");
Serial.print(distance / 30.48);
Serial.print(" feet ");
delay(100);
}