KY-021 MINI MAGNETIC REED SWITCH MODULE
Short description :
The KY-021 Magnetic Reed Switch module is a switch that is normally open and gets closed when exposed to a magnetic field, sending a digital signal. Commonly used in mechanical systems as proximity sensors.
Working with (Compatible)
Arduino, ESP32, Nodemcu, ESP8266, Raspberry Pi, and ......
ARDUINO IDE CODE
Example description :
the module detects a magnetic field. Place a magnet near the module to activate the reed switch on/off led
int led = 13; // LED pin
int reelSwitch = 2; // magnetic senso rpin
int switchState; // variable to store reel switch value
void setup()
{
pinMode (led, OUTPUT);
pinMode (reelSwitch, INPUT);
}
void loop()
{
switchState = digitalRead(reelSwitch); // read the value of digital interface 2 and assign it to switchState
if (switchState == HIGH) // when the magnetic sensor detect a signal, LED is flashing
{
digitalWrite(led, HIGH);
}
else
{
digitalWrite(led, LOW);
}
}