![]() ![]() Hence, the receiver is imitating the actions of the transmitter. As a result, the receiver now receives “0” and the LED on the receiver side is also turned OFF. Similarly, when the data “0” is transmitted by the RF transmitter, the LED on the transmitter side is turned OFF. When the receiver receives “1”, the Arduino on the receiver side of the project will turn ON the LED on its side. As this “1” is transmitted via RF communication, the receiver will receive the data “1”. Whenever the “1” is sent, the LED on the transmitting side of the project will be turned ON. it sends the character “1” and with a delay of few seconds, it sends the character “0”. In this project, the transmitter simply sends two characters i.e. This library consists of several functions that are used for configuring the modules, transmission of data by the transmitter module and data reception by the receiver module. It is a communication library that allows two Arduino’s to communicate with each other using RF Module i.e. VirtualWire.h is a special library for Arduino created by Mike McCauley. If we want to implement the project without the library, then we need to change the receiver part of the circuit. The project implemented here uses the library. Note: The project can be implemented with or without the help of a special library called “VirtualWire.h”. The working of the project is explained here. ![]() The aim of the project is to successfully transmit data between the RF Transmitter – Receiver modules using two Arduino UNO microcontroller boards. In this project, a simple demonstration of RF Communication with the help of Arduino UNO boards is given. The on board LED which is connected to the 13 th pin of Arduino is used in the project although an external LED can always be used. The data pin is connected to Pin 12 of the Arduino.Īn antenna similar to the transmitter module is connected to the antenna pin of the 434 MHz Receiver module. VCC and GND pins are connected to 3.3V pin of the Arduino and ground respectively. The RF Receiver Module consists of 4 – pins: VCC, GND, Data and Antenna. The design of the Receiver part is as follows. An external LED can be used along with a current limiting resistor but on board LED would be sufficient. The receiver part consists of Arduino UNO and the 434 MHz Receiver module. We are using the on board LED for demonstration but an external LED along with current limiting resistor can be used. The antenna pin must be connected to an antenna which is nothing but a wire wound in the form of a coil. The data pin is connected to any of the digital input / output pin of Arduino. VCC and GND pins are connected to 5V and ground respectively. ![]() The RF Transmitter Module consists of 4 – pins: VCC, GND, Data and Antenna. The design of the Transmitter part is as follows. An external LED can be used but on board LED would be sufficient. The transmitter part consists of Arduino UNO and the 434 MHz Transmitter module. This module can be used for communication for distances up to 40 meters. In this project, we are using a 434 MHz RF Transmitter – Receiver pair. Usually, the frequency at which these modules communicate will be 315 MHz or 434 MHz. RF Module comprises of a transmitter and a receiver that operate at a radio frequency range. ![]() RF Module is a cheap wireless communication module for low cost application. In this project, two Arduino boards will communicate using wireless communication.
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