Demonstration

In this project the transmitter is sending a message “Hello World!” to the receiver via

RF. Those messages

are being displayed in receiver’s serial monitor. The following

figure shows what you should see in your Arduino IDE serial monitor.

Wrapping Up

You need to have some realistic expectations when using this module. They work very

well when the receiver and transmitter are close to each other. If you separate them too

far you’ll lose the communication. The communication range will vary. It depends on

how much voltage you’re supplying to your transmitter module, RF noise in your

environment, and if you’re using an external antenna.