Using The 433MHZ RF Wireless Transmitter and Receiver Module Kit with Arduino

INTRODUCTION:

This tutorial details the 433MHZ RF Wireless Transmitter and Receiver Module Kit, its functions and the process to build a project using the 433MHZ RF Wireless Transmitter and Receiver Module Kit and an Arduino.

THE 433MHZ RF WIRELESS TRANSMITTER AND RECEIVER MODULE KIT:

The 433Mhz RF transmitter with receiver module kit consists of an XD-RF-5V 433MHz receiver and XD-FST 433MHz transmitter. The kit can create a wireless RF connection for a remote control switch, receiver module, or similar wireless applications/projects.

PIN OUT:

Transmitter

Receiver

HOW DOES IT WORK?

The 433Mhz RF transmitter with receiver module kit is composed of a transmitter and a receiver module. The kit creates a one-way wireless communication with 2 microcontrollers.

PROJECT – ARDUINO SERIAL DATA SENDER AND RECEIVER

This project utilizes 2 sets of Arduino and 433Mhz RF transmitter with receiver module kits and demonstrates how a message is sent from one Arduino to the other.

PROJECT COMPONENTS REQUIRED:

• Arduino Uno Board (2 pcs.)
• 433Mhz RF transmitter with receiver module kit (1 pc.)
• Jumper Wires

WIRING DIAGRAM:

Transmitter

Receiver

Transmitter:

Receiver:

CODE:

Download the library for the module first before proceeding. The library is available here; 433Mhz RF transmitter with receiver module library

Once the library is installed, the program code can be uploaded.

TRANSMITTER:
#include <RH_ASK.h>
#include <SPI.h> // Not actually used but needed to compile

RH_ASK driver;

void setup()
{
    Serial.begin(9600);	  // Debugging only
    if (!driver.init())
         Serial.println("init failed");
}

void loop()
{
    const char *msg = "MESSAGE FROM ARDUINO TRANSMITTER!";
    driver.send((uint8_t *)msg, strlen(msg));
    driver.waitPacketSent();
    delay(1000);
}

RECEIVER:

#include <RH_ASK.h>
#include <SPI.h> // Not actualy used but needed to compile

RH_ASK driver;

void setup()
{
    Serial.begin(9600);	// Debugging only
    if (!driver.init())
         Serial.println("init failed");
}

void loop()
{
    uint8_t buf[12];
    uint8_t buflen = sizeof(buf);
    if (driver.recv(buf, &buflen)) // Non-blocking
    {
      int i;
      // Message with a good checksum received, dump it.
      Serial.print("Message: ");
      Serial.println((char*)buf);         
    }
}

PROJECT TEST:

Once the components are wired as per the wiring diagram, connect the Arduino to the PC and upload the program. Open the Serial Monitor in the Arduino IDE on the receiver side and the following text will be displayed; “MESSAGE FROM ARUDINO TRANSMITTER”.