KY-031 Knock Module Features
This module is a spring-based sensor that sends a HIGH signal when a vibration is detected. It can be widely used in security systems, or monitoring. You can easily use it with the Arduino board or any other microcontroller.
Tip
It is recommended to use microcontroller interrupt pins in order to increase accuracy.
You can download the datasheet of this module here.
KY-031 Knock Module Pinout
This sensor has 3 pins:
- VIN: Module power supply – 5 V
- GND: Ground
- OUT: Signal output
You can see the pinout of this module in the image bellow.
Required Materials
Hardware Components
Software Apps
Interfacing KY-031 Knock Sensor with Arduino
Step 1: Circuit
The following circuit shows how you should connect Arduino to KY-031 module. Connect wires accordingly.
Step 2: Code
Upload the following code to Arduino.
/*
on Sep 23, 2020
by MohammedDamirchi
Home
*/
const byte interruptPin = 2;
// the setup routine runs once when you press reset:
void setup() {
// initialize serial communication at 9600 bits per second:
Serial.begin(9600);
attachInterrupt(digitalPinToInterrupt(interruptPin), Knock, RISING );
}
void Knock() {
Serial.println("1");
delay(2);
}
// the loop routine runs over and over again forever:
void loop() {
Serial.println("0");}
After running the code, you will see the following image in the serial output.
