How to Communicate Using 433MHz Modules

Application

433MHz radio modules are modules which can communicate using the 433MHz frequency band. It work like any wireless system : a system using these modules is composed of an transmitter and a receiver.

They're massively used in system like garage door, wireless doorbell, etc...

Library

433MHz modules use the VirtualWire Library. The problem with VW Library, it's that the message sent isn't sure to arrive at destination. It can be dangerous to use it in robotics or aeromodelism.

In addition, VW Library isn't the good Library if you want to send a message to a specific recipient.

Note : before using your modules, make sure that they can be use in your country. Regulations ( about frequency ) differ from one country to another one.

Connections

Arduino --> transmitter

5V --> 5V

GND --> GND

D12 --> Data

Arduino --> potentiometer

First pin --> 5V

Second pin --> A0

Third pin --> GND

Arduino --> receiver

5V --> 5V

GND --> GND

D11 --> Data

Arduino --> Servo motor

Red wire --> 5V

Black wire --> GND

Yellow wire --> D3