Arduino 315/330/433MHz Transmitter/Receiver (XD-FST/XD-RF-5V)

The Arduino 315/330/433MHz Transmitter/Receiver (XD-FST/XD-RF-5V): Arduino 315/330/433MHz Transmitter/Receiver (XD-FST/XD-RF-5V) | Arduino Projects

Set your own message in the code and use the serial monitor to see it be transferred from one Arduino to the other.