RF433 Wireless Switch Automation


RF433 Automation Circuit Diagram
https://github.com/anokhramesh/RF433-Relay-and-pushbutton



Arduino code for RF 433 Mhz Transmitter and Receiver Remote control Switch
// RF 433 TX code
#include <VirtualWire.h>

#define button 6

char *data;
int val;
int value = 0;

void setup() 
{
  vw_set_tx_pin(12);
  vw_setup(2000);
  pinMode(button, INPUT_PULLUP);
}

void loop()
{
  val = digitalRead(button);
  if(val == LOW && value == 0)
  {
    data="a";
    vw_send((uint8_t *)data, strlen(data));
    vw_wait_tx();
    delay(500);
    value = 1;
  }
  else if(val == LOW && value == 1)
  {
    data="b";
    vw_send((uint8_t *)data, strlen(data));
    vw_wait_tx();
    delay(500);
    value = 0;
  }
  delay(200);
}

//RF433 Rx code

#include <VirtualWire.h>
#define ledPin 13// change the pin number according to you reuirement

void setup()
{
    vw_set_rx_pin(11);
    vw_setup(2000);
    pinMode(ledPin, OUTPUT);
    vw_rx_start();
}

void loop()
{
    uint8_t buf[VW_MAX_MESSAGE_LEN];
    uint8_t buflen = VW_MAX_MESSAGE_LEN; 
 
    if (vw_get_message(buf, &buflen))
    {
      if(buf[0]=='a')
      {  
       digitalWrite(ledPin,HIGH);
      }  
      else if(buf[0]=='b')
      {
       digitalWrite(ledPin,LOW);
      }
    }
}
 


//RF433 Mhz Relay control(Receiver Code)

#include <VirtualWire.h>
#define ledPin 13//connect pin # 13 of Arduino to LED Indicator
#define RelayPin 6//connect pin # 6 of Arduino to Relay  module IN.

void setup()
{
    vw_set_rx_pin(11);//connect pin # 11 of Arduino to Data pin of RF module. 
    vw_setup(2000);
    pinMode(ledPin, OUTPUT);
    pinMode(RelayPin, OUTPUT);
    vw_rx_start();
}

void loop()
{
    uint8_t buf[VW_MAX_MESSAGE_LEN];
    uint8_t buflen = VW_MAX_MESSAGE_LEN; 
 
    if (vw_get_message(buf, &buflen))
    {
      if(buf[0]=='a')
      {  
       digitalWrite(ledPin,HIGH);
       digitalWrite(RelayPin,LOW);
      }  
      else if(buf[0]=='b')
      {
       digitalWrite(ledPin,LOW);
       digitalWrite(RelayPin,HIGH);
      }
    }
}


RF433Mhz relay (Transmitter code)

#include <VirtualWire.h>
#define ledPin 13
#define button 6

char *data;
int val;
int value = 0;

void setup() 
{
  vw_set_tx_pin(12);
  vw_setup(2000);
  pinMode(ledPin, OUTPUT);
  pinMode(button, INPUT_PULLUP);
}

void loop()
{
  val = digitalRead(button);
  if(val == LOW && value == 0)
  {
    data="a";
    vw_send((uint8_t *)data, strlen(data));
    vw_wait_tx();
    digitalWrite(ledPin,HIGH);
    delay(500);
    value = 1;
  }
  else if(val == LOW && value == 1)
  {
    data="b";
    vw_send((uint8_t *)data, strlen(data));
    vw_wait_tx();
    digitalWrite(ledPin,LOW);
    delay(500);
    value = 0;
  }
  delay(200);
}





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