View source for 433Mhz RF link kit


== Introduction  ==

The kit is consisted of transmitter and receiver, popular used for remote control.

[[File:Rf1.jpg|600px]]

== Specification  ==

*Frequency: 433Mhz. 
*Modulation: ASK 
*Receiver Data Output: High - 1/2 Vcc, Low - 0.7v 
*Transmitter Input Voltage: 3-12V (high voltage = more transmitting power) 

== Wiring diagram ==
[[File:RF.jpg|800px]]

= examlple code =
Transmmiter:

 #include <VirtualWire.h>
 #undef int
 #undef abs
 #undef double
 #undef float
 #undef round
 void setup()
 {
    Serial.begin(9600);	  // Debugging only
    Serial.println("setup");
    // Initialise the IO and ISR
    vw_set_ptt_inverted(true); // Required for DR3100
    vw_setup(2000);	 // Bits per sec
 }
 void loop()
 {
    const char *msg = "hello";
    digitalWrite(13, true); // Flash a light to show transmitting
    vw_send((uint8_t *)msg, strlen(msg));
    vw_wait_tx(); // Wait until the whole message is gone
    digitalWrite(13, false);
    delay(200);
 }

Receiver:

 #include <VirtualWire.h>
 #undef int
 #undef abs
 #undef double
 #undef float
 #undef round
 void setup()
 {
    Serial.begin(9600);	// Debugging only
    Serial.println("setup");
    // Initialise the IO and ISR
    vw_set_ptt_inverted(true); // Required for DR3100
    vw_setup(2000);	 // Bits per sec
    vw_rx_start();       // Start the receiver PLL running
 }
 void loop()
 {
    uint8_t buf[VW_MAX_MESSAGE_LEN];
    uint8_t buflen = VW_MAX_MESSAGE_LEN;
    if (vw_get_message(buf, &buflen))//Non-blocking
   {	
    int i;
    digitalWrite(12, true);  //Flash a light to show received good message
    Serial.print("Got: "); //Message with a good checksum received, dump it.
    for (i = 0; i < buflen; i++)
   {
    Serial.print(buf[i], HEX);
    Serial.print(" ");
     }
    Serial.println("");
    digitalWrite(12, false);
    }
    }