How to Upload a Libray to Ardruino
Contributors: 
What's a Library?
Arduino libraries take a complex task and eddy it down to simple to use functions. Arduino users accept written lots of exciting add together-ons for Arduino. For example, capacitive sensing takes difficult timing and pulsing of digital pins. We can write the code from scratch, or nosotros can stand on the shoulders of bully people who are smarter than we are.
Capacitive bear upon sensing is a very popular interface. The CapacitiveSensor library takes care of everything so that we don't have to write code like this:
linguistic communication:c *sOut &= ~sBit; // set Send Pivot Register low *rReg &= ~rBit; // set receivePin to input *rOut &= ~rBit; // set up receivePin Register depression to make sure pullups are off *rReg |= rBit; // set pin to OUTPUT - pivot is at present Low AND OUTPUT *rReg &= ~rBit; // prepare pivot to INPUT *sOut |= sBit; // gear up send Pin High interrupts(); // enable interrupts while ( !(*rIn & rBit) && (full < CS_Timeout_Millis) ) { total++; } if (total > CS_Timeout_Millis) return -2; // total variable over timeout // set receive pivot HIGH briefly to charge up fully noInterrupts(); // disable interrupts *rOut |= rBit; // set receive pin HIGH - turns on pullup *rReg |= rBit; // ready pivot to OUTPUT - pin is at present Loftier AND OUTPUT *rReg &= ~rBit; // gear up pin to INPUT *rOut &= ~rBit; // turn off pullup *sOut &= ~sBit; // set transport Pin Depression interrupts(); // re-enable interrupts while ( (*rIn & rBit) && (total < CS_Timeout_Millis) ) { total++; } if (total >= CS_Timeout_Millis) return -two; // full variable over timeout else return 1; All that code can be replaced with a much easier to use and understand statement such as:
linguistic communication:c senseReading = myCapPad.capacitiveSensor(30); The myCapPad.capacitiveSensor() takes care of all the heavy lifting and the senseReading variable contains the value sensed from our capacitive pad. Libraries make circuitous tasks easier and so that nosotros can focus on larger projects.
There are thousands of libraries out there! And luckily information technology's pretty like shooting fish in a barrel to install them. This tutorial will show you how to install a library in Arduino v1.0.five but should apply for many past, present, and time to come versions of Arduino.
Suggested Reading
Brand sure y'all have a expert agreement of the following concepts before getting whatsoever further into this tutorial.
What is an Arduino?
What is this 'Arduino' matter anyway? This tutorials dives into what an Arduino is and forth with Arduino projects and widgets.
Installing Arduino IDE
A step-past-step guide to installing and testing the Arduino software on Windows, Mac, and Linux.
The Arduino website besides has slap-up instructions on installing libraries if you need more information for using the Arduino IDE's library manager, importing a *.nada library, and transmission installation.
Using the Arduino Library Manager
The library manager was added starting with Arduino IDE versions 1.v and greater (1.6.x). It is found in the 'Sketch' carte under 'Include Library', 'Manage Libraries...'
Arduino one.5+ Library Director Card Option
When you open the Library Managing director you will discover a big list of libraries prepare for ane-click install. To observe a library for your production, search for the product name or a keyword such as 'g type' or 'digitizer', and the library you desire should testify up. Click on the desired library, and the 'Install' button will announced. Click that button, and the library should install automatically. When installation finishes, close the Library Manager.
Library in the Library Director, Fix to exist Installed
Alternatively, if you have a library of your own you would like to add together or a library that hasn't been added to the Library Manger still, you tin click the 'Add .ZIP Library' choice, which volition then allow you lot to choose a folder or *.nothing file containing the library of your choice.
Heads up! In previous version of the Arduino IDE, all libraries were stored together deep within the contents folder of the Arduino application. Yet, in newer versions of the IDE, libraries added through the Library Manger can be found in a folder named 'libraries' found in your Arduino Sketchbook folder.
For more information on the Library manger, including deleting and updating info, visit the GitHub: Arduino - Library Managing director FAQ.
Now that the library is installed, an instance sketch tin be found in the 'Examples' submenu.
Example Sketch
Since this is a relatively new feature of the Arduino IDE at the time of this writing non all SparkFun products will have libraries in the library manager. Nosotros are adding new products and working our manner through older products over time. If you don't find the library you lot demand in the manager or for some reason cannot install ane of the modern IDE releases, follow the instructions in the following sections.
Manually Installing a Library - Windows
This section covers manually installing a library under the Windows environment and utilizes quite a few screen shots. If you're more of a text learner then check out the Arduino tutorial on installing libraries.
We are going to use the Capacitive Sense library for this instance. Navigate to the library's folio and download the zero file.
The contents of the Capacitive Sense zip file
Notice the zip file on your local computer (wherever downloaded files end up). Nether Windows, you should be able to double click on the file to open information technology up.
This particular library contains libraries for both the bones Arduino and the more advanced Arduino Due. You can utilize both if you'd similar, but, for this instance, we will be copying and installing only the CapacitiveSensor folder.
Libraries will usually contain a *.cpp file and .h file. Most volition besides contain an examples folder.
Under Windows, Arduino stores all the add-on libraries within the My Documents folder. Here we see the location of the Arduino libraries binder.
Open an explorer window and navigate to the libraries folder under My Documents. Now re-create the new CapacitiveSensor folder to the libraries folder.
Success!
To verify the library has been installed correctly, open upwards the Examples binder under the Arduino IDE. Look. Where's the CapacitiveSensor example? Did you accept Arduino open when you copied and pasted the directory? Arduino checks the library directory at startup so if you already have Arduino open, you volition need to restart Arduino any fourth dimension you add to the libraries directory.
If you don't encounter the CapacitiveSensor example try endmost and re-opening Arduino IDE.
There information technology is! Let'due south open the case provided with our new library.
Examples are the greatest thing well-nigh libraries! Proficient libraries will have well written examples showing how to utilise the library. These sketches are wonderful resources for case code and learning how to write skilful code under Arduino.
Yous now have the Capacitive Sensor library installed! Feel costless to outset from the example sketch, or begin writing your own code using the functions provided by the library. A library usually has documentation either on its site or written into readme files and instance code. In general, to quickly learn how to use a library bank check out the example code.
Manually Installing a Library - Mac
This section covers manually installing a library under the Mac OS Ten environment. If you're more of a text learner and so check out the Arduino tutorial on installing libraries.
Nosotros are going to utilize the Capacitive Sense library for this example. Navigate to the library's folio and download the zip file.
Find the null file on your local computer (wherever downloaded files end up). Unzip it, and wait at the folder contents.
The contents of the Capacitive Sense zip file. Libraries will unremarkably contain a *.cpp* file and *.h* file. Near will also contain an *examples* binder.
This item library contains libraries for both the bones Arduino and the more advanced Arduino Due. You tin can utilise both if you'd like, but, for this example, we volition exist copying and installing only the CapacitiveSensor folder.
Now we need to add this folder to the Libraries folder for Arduino. This folder is somewhat hidden in OS X. To become there y'all tin can do one of ii things. Option ane, right-click on the Arduino icon located in your Dock. Go up to 'Options', then click 'Show in Finder'.
Option two, discover the Arduino app located in your applications folder inside Finder. At present, right-click on the Arduino app, and select 'Show Package Contents'. Either option should go y'all to this point.
Navigate through the following folders, 'Contents -> Resources -> Java', until you reach the 'libraries' binder.
Inside the libraries folder is where y'all want to re-create/motility the library folder you lot only downloaded and unzipped. You'll also detect this is where all the default libraries alive as well as any other libraries you may accept installed in the past.
Next, make sure that restart the Arduino IDE if it was open when you installed the library. This is a very important, oftentimes disregarded stride. If you don't restart, the library you merely installed will not yet exist available to the IDE.
To verify the library has been installed correctly, open up the 'File > Examples' folder under the Arduino IDE.
There it is! Let's open the case provided with our new library.
Examples are the greatest thing about libraries! Good libraries will take well written examples showing how to use the library. These sketches are wonderful resources for example lawmaking and learning how to write good code under Arduino.
You now have the Capacitive Sensor library installed! Experience costless to start from the example sketch, or brainstorm writing your own code using the functions provided by the library. A library normally has documentation either on its site or written into readme files and example lawmaking. In general, to quickly learn how to use a library bank check out the example lawmaking.
Resource and Going Further
If you're looking for some great libraries to get started with, here are some of our favorites:
- TinyGPS is the gold standard for interfacing to GPS modules.
- SevSeg is a library we wrote to brand controlling 7-segment displays easier.
- Sdfat is a very good library that allows you to read and write files to SD cards. Neat for datalogging! Be certain to checkout all the examples included with the library.
- MP3Shield is a great example of a customer of SparkFun taking circuitous instance code and creating a very proficient library to brand the device easier to use.
- EEPROM is a built-in library that allows users to read and store settings inside the non-volatile memory of the ATmega328. Very useful!
- Capacitive Sensor is the library nosotros covered in this tutorial. It's great for non-contact capacitive switches and field sensing.
- Infrared Remote is a smashing library for reading signals from IR remotes and controlling IR remote based things like TVs and sound systems.
Congenital-In Libraries
You may not realize it, but you're probably already using libraries! If you've used:
Serial.impress("Hello world!"); Then you're using the Serial() library congenital in to Arduino. Arduino has quite a few congenital-in libraries. Here's the list of the standard libraries that you tin start using immediately!
Write your Ain Arduino Library
Once you've used a handle of different libraries, consider writing your own! Here's a good tutorial showing how to write your own library and then that you can help the globe by making complex tasks a little easier.
Including Your Library in the Library Director
If you would like to have information technology included in the Arduino IDE Library Director, make sure that your library fits the standards.
Then submit an outcome asking for you 3rd party library in the GitHub repo for the Arduino IDE linked beneath. For an instance of submitting a request, bank check out SparkFun's fingerprint scanner TTL library request.
Looking for the right Arduino?
Cheque out our Arduino Comparing Guide! We've compiled every Arduino development board nosotros conduct, so yous can quickly compare them to detect the perfect one for your needs.
Accept me in that location!
More Arduino
If you're looking for more Arduino tutorials, accept a expect at these:
Installing an Arduino Bootloader
This tutorial will teach yous what a bootloader is and why you would need to install or reinstall it. We volition also go over the process of burning a bootloader by flashing a hex file to an Arduino microcontroller.
Data Types in Arduino
Learn about the common information types and what they signify in the Arduino programming surroundings.
Or check out this weblog post for more ideas.
Source: https://learn.sparkfun.com/tutorials/installing-an-arduino-library/all
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