About: I like to make stuff in my free time. Especially programming, cooking, electronics etc. Lately I'm making tutorials about stuff I made the last few years.

In this instructable you will learn how to communicate between Arduinos over a long distance up to 1.8km in open air.

The HC-12 is a wireless serial port communication module that is very useful, extremely powerful and easy to use.

First you will learn how to make a wireless instant messenger with the least effort possible.

Then we will move on to light up an LED with a push button and then you will learn a few useful string functions and operations for serial communication.

The last part of the instructable is not necessary but you will learn how to use the HC-12 module like a pro.

In this part you will learn how to enter the modules setup mode to change the baud rate, transmission distance and so on.

And finally you will learn how to connect an external SMA antenna.

Follow the rest of this instructable to find out how easy it is to become a pro in wireless serial communication.