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Arduino Development Cookbook

You're reading from   Arduino Development Cookbook Over 50 hands-on recipes to quickly build and understand Arduino projects, from the simplest to the most extraordinary

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Product type Paperback
Published in Apr 2015
Publisher
ISBN-13 9781783982943
Length 246 pages
Edition 1st Edition
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Author (1):
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Cornel M Amariei Cornel M Amariei
Author Profile Icon Cornel M Amariei
Cornel M Amariei
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Toc

Table of Contents (11) Chapters Close

Preface 1. Power on – Arduino Basics FREE CHAPTER 2. Blinking LEDs 3. Working with Buttons 4. Sensors 5. Motor Control 6. More Output Devices 7. Digital Communication with Arduino 8. Hacking A. Electronics – the Basics Index

Software serial and UART between Arduinos


The serial port, professionally called Universal Asynchronous Receiver/Transmitter (UART) communication, is generally used to program and debug the Arduino via the USB port. There are multiple sensors and systems that use UART as the main communication method, and sometimes we need to discuss between two Arduinos to share information, workload, and so on.

However, most Arduinos only have one serial port, which is used by the USB connection. Serial communication can only happen between two devices. What can we do now? With a bit of luck, we'll have an Arduino Mega or similar that has up to four serial ports, but if we don't, there still is a solution. A special library has been written that simulates an UART port on other digital pins. There are a few drawbacks, but it generally works.

Getting ready

Following are the ingredients needed for this recipe:

  • 2 Arduinos

  • Jumper cables

How to do it…

Follow steps to connect two Arduino UNOs using software serial:

  1. Assuming...

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