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433MHz Radio module

Assignment of radio modules​

The XD-RF-5V receiver and FS1000A/XD-FST transmitter for 433MHz radio are used to transfer data between two devices. They are very often used to connect several Arduino devices.

XD-RF-5V Receiver and FS1000A/XD-FST transmitter

Picture 1. XD-RF-5V Receiver and FS1000A/XD-FST Transmitter

Transmitting signals to control the LED​

Connect the LED to pin 3, and the DATA pins of the receiver and transmitter to the pins of 2 different Arduino.

Connection diagram​

![Radio module connection diagram]

Picture 2. Connection diagram of the radio module

Transmitter program​

#include <RCSwitch.h>
 
RCSwitch mySwitch = RCSwitch();
 
void setup() {
    mySwitch.enableTransmit(2);
}
 
void loop() {
    mySwitch.send(B0100, 4);
    delay(1000); 
    mySwitch.send(B1000, 4);
    delay(1000); 
}

Receiver program​

#include <RCSwitch.h>
 
RCSwitch mySwitch = RCSwitch();
 
void setup() {
    pinMode( 3, OUTPUT );
    mySwitch.enableReceive(0);
}
 
void loop() {
    if( mySwitch.available() ){
        int value = mySwitch.getReceivedValue();
 
        if( value == B1000 )
            digitalWrite( 3, HIGH );
        else if( value == B0100 )
            digitalWrite( 3, LOW );
 
        mySwitch.resetAvailable();
    }
}