Introduction

The following article is written in order to demonstrate how my arduino libraries libRtttl & AnyRtttl can be used to convert arduino code (tone() and delay() functions calls) into actual RTTTL melodies.

This article shows how to convert ‘Game of Throne theme’, ‘Star Wars - The imperial March’ and most Super Mario Bros. sound themes (Main theme, 1-up life sound, Flagpole fanfare, Death and Game Over sounds) into actual playable RTTTL melodies.

Introduction

The reason I started this project is because I recently had a bad experience flying a quadcopter too far from me until I was not able to distinguish if the quad was facing me or not. It does not require much distance before a quadcopter looks like a tiny black dot in the sky. Basically, I lost orientation of the quad and I had to land way too far from my takeoff location.

Introduction

The following article is about my simplest library that I wrote for the arduino: SoftTimers. The SoftTimers arduino library allows one to properly time multiple events and know when each “timer” expires meaning that an action is required.

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When I first learned programming the arduino, I learned the “hello world” of the arduino: turning a LED on and off. As expected, I used delay() to define how long the LED should be on and off.

Introduction

The following article is about another library that I have written: libRtttl is a c++ library for manipulating the RTTTL audio format.

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See this post for a quick recall of the RTTTL format.

Edit: for a better understanding and examples of what libRTTTL can do, please see this post: How to convert arduino code to actual RTTTL melodies using libRtttl and AnyRtttl.

Purpose

RTTTL songs available on the internet are not optimized for the smallest size. Still they are readable by a human but they are far from optimized for the arduino embedded device. Most RTTTL song can be optimized (without quality loss) and have their size reduced by ~20%. Conversion to binary allows even better compression but it wont be human readable anymore.

Introduction

The following article is about yet another Arduino library that I have written. AnyRtttl is a feature rich arduino library for playing RTTTL melodies. The library offers much more interesting features than relying on the widely available void play_rtttl(char *p) function. The AnyRtttl is a feature rich library which supports all best RTTTL features.

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Purpose

See this post for a quick recall of the RTTTL format.

Introduction

Please note that win32Arduino source code is now moved to GitHub. Source code can be downloaded from the project’s GitHub page.

After implementing many arduino library, I realized that unit testing a library is harder than I though. Most of the time, the library does not even require advanced arduino functionalities and could be tested outside of the arduino platform.

The win32Arduino is a solution to this issue.

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Introduction

In a personal project, I wanted to add 2 new devices to an existing quadcopter. The quadcopter was equipped with a 6-channel receiver meaning I only had 1 spare channel to control the 2 devices:

The following article explains how I manage to solve the issue: How can I control more than one device using a single channel.

Introduction

The following arduino library was written to use the findings found during the Mapping RC Transmitter PWM signal to actual transmitter values article. All results were wrapped into a library for ease of use.

The RcReceiverSignal is an arduino library that allows one to read a signal sent from a Remote Controlled (RC) receiver.

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Purpose

The RcReceiverSignal library allows one to easily configure an input pin to read a PWM signal sent from a RC receiver by attaching a RcReceiverSignal instance to a pin connected the receiver and automatically monitor each pulse sent by the receiver.

Introduction

If you ever need to use an RC Transmitter & receiver for a personal project, an easy way to retrieve the signal is to connect the receiver to a micro-controller.

However, decoding the signal to get actual transmitter values is not as easy as it sounds. You need to know the correct encoding and searching on the internet about the subject gives erratic results.

Here is the full article that explains how to correctly map an RC Transmitter PWM signal to actual transmitter values.

Introduction

Here is another arduino library that I have written.

As a desktop developer, I am not used to have memory (or even CPU) requirements as most developers will not look at memory consumption as an arduino developer would. Memory & CPU is cheap. If your application is struggling to run on today’s computer, it will run smoothly in 1-2 years.

As most arduino developers have faced, the amount of memory available on embedded devices is pretty limited. Having a way to save bits or our precious memory is interesting.