RF Wireless 315 / 433 MHz Transmitter Module

Specification:

• Launch distance: 20 - 200 meters (higher voltage yields better results)
• Operating voltage: 5V
• Operating mode: AM
• Transfer rate: 4KB / S
• Transmitting power: 10mW
• Transmitting frequency: 315MHz / 433MHz
• Antenna: 25cm solid core spiral wound
• Pinout from left → right: (DATA, VCC, GND)
• External antenna: 25cm ordinary multi-core or single core (not included)

Connect RF Transmitter Module with Arduino  (arduinobasics)

We will make the Arduino's onboard LED illuminate when the transmitter pin is HIGH, and go off when LOW as described in the following table.

And this is the Arduino Sketch to carry out the data transmission:

Arduino sketch - Transmitter

/* 
  RF Blink - Transmit sketch 
     Written by ScottC 17 Jun 2014
     Arduino IDE version 1.0.5
     Website: http://arduinobasics.blogspot.com
     Transmitter: FS1000A/XY-FST
     Description: A simple sketch used to test RF transmission.          
 ------------------------------------------------------------- */

 #define rfTransmitPin 4  //RF Transmitter pin = digital pin 4
 #define ledPin 13        //Onboard LED = digital pin 13

 void setup(){
   pinMode(rfTransmitPin, OUTPUT);     
   pinMode(ledPin, OUTPUT);    
 }

 void loop(){
   for(int i=4000; i>5; i=i-(i/3)){
     digitalWrite(rfTransmitPin, HIGH);     //Transmit a HIGH signal
     digitalWrite(ledPin, HIGH);            //Turn the LED on
     delay(2000);                           //Wait for 1 second
     
     digitalWrite(rfTransmitPin,LOW);      //Transmit a LOW signal
     digitalWrite(ledPin, LOW);            //Turn the LED off
     delay(i);                            //Variable delay
   }
 }