reichelt ST1099 Dual Ultrasonic Sensor

Instructions
The HC‐SRF04 is an inexpensive ultrasonic sensor that can sense not only if an object presents itself, like a PIR sensor, but can also sense and relay the distance to that object.

Features

• Power Supply :+5V DC
• Quiescent Current : <2mA
• Working Currnt: 15mA
• Effectual Angle: <15°
• Ranging Distance : 2cm – 400 cm/1″ ‐ 13ft
• Resolution : 0.3 cm
• Measuring Angle: 30 degree
• Trigger Input Pulse width: 10uS

Pin Instruction

Pin Name                                            Description

Example
This example allows you display the defect distance on your ARDUIN’s Serial window.

Pin connection:

• Vcc========== Power(5V DC)
• Trig========== 12
• Echo========== 13
• Gnd===========Gnd

Picture connection as below:

Example code

Code begin

define trigPin 13

define echoPin 12

define led 11

define led2 10

void setup() { Serial.begin
(9600); pinMode(trigPin,OUTPUT); pinMode(echoPin,
INPUT); pinMode(led,OUTPUT);
pinMode(led2, OUTPUT);

}
void loop() {
long duration, distance;
digitalWrite(trigPin, LOW); // Added this line
delayMicroseconds(2); // Added this line
digitalWrite(trigPin, HIGH);
// delayMicroseconds(1000); ‐ Removed this line
delayMicroseconds(10); // Added this line
digitalWrite(trigPin, LOW);
duration = pulseIn(echoPin, HIGH);
distance = (duration/2) / 29.1;
if (distance < 4) { // This is where the LED On/Off happens
digitalWrite(led,HIGH); // When the Red condition is met, the Green
LED should turn off
digitalWrite(led2,LOW);
}
else {
digitalWrite(led,LOW);
digitalWrite(led2,HIGH);
}
if (distance >= 200 || distance <= 0){
Serial.println(“Out of range”);
}
else {
Serial.print(distance);
Serial.println(” cm”);
}
delay(500);
}

Code end

Documents / Resources

| reichelt ST1099 Dual Ultrasonic Sensor [pdf] Instructions
ME140, ST1099, Dual Ultrasonic Sensor, ST1099 Dual Ultrasonic Sensor, Ultrasonic Sensor, Sensor
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