315Mhz wireless transmitter

gistfile1.ino

/*
SimpleSend
This sketch transmits a short text message using the VirtualWire library
connect the Transmitter data pin to Arduino pin 12
*/
#include <VirtualWire.h>
void setup()
{
// Initialize the IO and ISR
vw_setup(2000); // Bits per sec
}
void loop()
{
send("Hello there");
delay(1000);
}
void send (char *message)
{
vw_send((uint8_t *)message, strlen(message));
vw_wait_tx(); // Wait until the whole message is gone
}