Скачать или смотреть How to Store and Call Multiple Letters in Arduino

Learn how to efficiently store and manage multiple string inputs in Arduino. Follow this guide to enhance your programming skills with practical applications in LED control.
---
This video is based on the question https://stackoverflow.com/q/63859168/ asked by the user 'YellowOrange' ( https://stackoverflow.com/u/14264710/ ) and on the answer https://stackoverflow.com/a/63859374/ provided by the user 'Danny_ds' ( https://stackoverflow.com/u/5708620/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

Visit these links for original content and any more details, such as alternate solutions, latest updates/developments on topic, comments, revision history etc. For example, the original title of the Question was: How to store & call multiple letters in arduino?

Also, Content (except music) licensed under CC BY-SA https://meta.stackexchange.com/help/l...
The original Question post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license, and the original Answer post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license.

If anything seems off to you, please feel free to write me at vlogize [AT] gmail [DOT] com.
---
How to Store and Call Multiple Letters in Arduino: A Beginner's Guide

If you're new to programming with Arduino and trying to create a project that dynamically controls LEDs based on serial input, you might run into some challenges. For instance, you may find yourself struggling to understand how to effectively store and compare multiple string inputs from the serial monitor. This guide will guide you through the process step-by-step, helping you adapt your code to respond correctly to string inputs.

Understanding the Problem

In your early attempts, you noticed that when you typed inputs like "bathbright" into the serial monitor, your Arduino code didn't behave as expected. Initially, you received only the first character of your string (like "b") being printed rather than the full command. This is because Serial.read() only captures one byte at a time.

Solution: Enhancing Your Code

The Importance of Reading Full Strings

To properly handle string inputs, the Serial.readString() function can be utilized. This method reads the entire string from the serial input until a newline character is received. Here’s how the solution works effectively:

Set Up Your Variables:

Define the LED pin numbers.

Use a string variable to capture the entire input from the serial.

Loop to Capture Input:

Instead of calling Serial.read() repeatedly, use Serial.readString() to get the complete string.

Implement indexOf to check for specific commands within the captured input.

Final Code Structure

Here’s the final version of your Arduino code that effectively utilizes these principles:

[[See Video to Reveal this Text or Code Snippet]]

Explanation of Code Changes

Using String str = Serial.readString();: This line captures the full string from the user input.

Checking with indexOf: Each command is checked to see if it exists in the input string.

Performing Actions Based on Commands: Based on the detected string, you turn on or off the corresponding LED.

Advantages

Flexibility in Commands: You can easily add more commands without changing the structural logic of your code.

User-Friendly: This method allows for straightforward interaction through the serial monitor.

Conclusion

By following this guide, you’ll not only learn how to effectively store and call multiple letters in Arduino but also improve your programming skills for future projects. Whether you're just starting or looking to refine your coding abilities, tackling string inputs in Arduino can greatly enrich your experience.

Feel free to try out the code above and adjust it to suit your needs! Happy coding!