KS0375 keyestudio SR01 Ultrasonic Module V2
Introduction
keyestudio SR01 Ultrasonic Module V2 is a very affordable proximity/distance sensor that has been used mainly for object avoidance in various robotics projects.
It uses upgraded N76E003AT20 solution.
It essentially gives your Arduino eyes / spacial awareness and can prevent your robot from crashing or falling off a table.
It has also been used in turret applications, water level sensing, and even as a parking sensor.
This simple project will use the SR01 ultrasonic module V2 with an Arduino and a processing sketch to provide a neat little interactive display on your computer screen.
Specification
- Working Voltage: DC 5V
- Working Current: 15mA
- Working Frequency: 40KHz
- Max Range: 2--3m
- Min Range: 2cm
- Measuring Angle: 15 degree
- Trigger Input Signal: 10µS TTL pulse
Connection Diagram
Sample Code
#define echoPin 7 // Echo Pin #define trigPin 8 // Trigger Pin #define LEDPin 13 // Onboard LED int maximumRange = 200; // Maximum range needed int minimumRange = 0; // Minimum range needed long duration, distance; // Duration used to calculate distance void setup() { Serial.begin (9600); pinMode(trigPin, OUTPUT); pinMode(echoPin, INPUT); pinMode(LEDPin, OUTPUT); // Use LED indicator (if required) } void loop() { /* The following trigPin/echoPin cycle is used to determine the distance of the nearest object by bouncing soundwaves off of it. */ digitalWrite(trigPin, LOW); delayMicroseconds(2); digitalWrite(trigPin, HIGH); delayMicroseconds(10); digitalWrite(trigPin, LOW); duration = pulseIn(echoPin, HIGH); //Calculate the distance (in cm) based on the speed of sound. distance = duration/58.2; if (distance >= maximumRange || distance <= minimumRange){ /* Send a negative number to computer and Turn LED ON to indicate "out of range" */ Serial.println("-1"); digitalWrite(LEDPin, HIGH); } else { /* Send the distance to the computer using Serial protocol, and turn LED OFF to indicate successful reading. */ Serial.println(distance); digitalWrite(LEDPin, LOW); } //Delay 50ms before next reading. delay(50); }
What Should You See
After upload the code to the board, open the serial monitor of Arduino IDE, and set the baud rate to 9600.
Move your hand or a large, flat object closer and farther away from the distance sensor. You can see the measured distance value pop up on the monitor.
Resources
- Download the PDF:
https://drive.google.com/open?id=1YI1tUmKgjitrF8M96XP5BOzQO5GrG60L
- Download the Code:
https://drive.google.com/open?id=1LGYR7XoIql1wdJbMAId3crV3z7_c9Byp