Ultrasonic Ranging Module (HC-SR04) [S011]
https://www.youtube.com/watch?v=QY1IJc7jPp4
*GitHub : https://github.com/rdiot/rdiot-s011.git
* Specs
Working Voltage DC 5 V
Working Current 15mA
Working Frequency 40Hz
Max Range 4m
Min Range 2cm
MeasuringAngle 15 degree
Trigger Input Signal 10uS TTL pulse
Echo Output Signal Input TTL lever signal and the range in proportion
Dimension 45*20*15mm
* Contents
VCC - 5V
Trig - D8
Echo - D9
GND - GND
- Key Code
#include "U8glib.h"
U8GLIB_SSD1306_128X64 u8g(U8G_I2C_OPT_NONE);
const int TriggerPin = 8; //Trig pin
const int EchoPin = 9; //Echo pin
long Duration = 0;
long Distance_mm = 0;
void setup() {
pinMode(TriggerPin, OUTPUT); // Trigger is an output pin
pinMode(EchoPin, INPUT); // Echo is an input pin
Serial.begin(9600); // Serial Output
}
void loop(void) {
digitalWrite(TriggerPin, LOW);
delayMicroseconds(2);
digitalWrite(TriggerPin, HIGH); // Trigger pin to HIGH
delayMicroseconds(10); // 10us high
digitalWrite(TriggerPin, LOW); // Trigger pin to HIGH
Duration = pulseIn(EchoPin, HIGH); // Waits for the echo pin to get high
Distance_mm = Distance(Duration); // Use function to calculate the distance
Serial.print("Distance = "); // Output to serial
Serial.print(Distance_mm);
Serial.println(" mm");
// picture loop
u8g.firstPage();
do {
draw();
} while( u8g.nextPage() );
// rebuild the picture after some delay
delay(500);
}
long Distance(long time)
{
// Calculates the Distance in mm
// ((time)*(Speed of sound))/ toward and backward of object) * 10
long DistanceCalc; // Calculation variable
DistanceCalc = ((time / 2.9) / 2); // Actual calculation in mm
//DistanceCalc = time / 74 / 2; // Actual calculation in inches
return DistanceCalc; // return calculated value
}
