Where are the libraries?

Using Arduino Programming Questions
1

I seem to be stuck in a loop.

For example,

arduino.cc/en/Reference/Libraries/Servo

Only leads to a "Download" tab on the top of the page, which leads back to downloading the main application.

So, where are the libraries? I got and installed the AccellStepper library with no problem, but what about the "official" Arduino ones?

2

Some libraries are inside a "libraries" folder of the application download.

3

With the exception of the AccelStepper folder, my "Libraries" folder only contains a Readme.txt file. It says:

"For information on installing libraries, see: http://arduino.cc/en/Guide/Libraries"

4

Well, this is what mine has:

5

Thus they exist, but where are they online?

6

In GitHub?

In the download, that's online.

7

Here:

https://github.com/arduino/Arduino/tree/master/libraries

8

Ok, fine. Found them. Now I have to play with this whole Git nonsense. Where are the *.zip files the website documentation promised?

9

I don't quite understand your problem. The Servo library is already in place, just use the example code.

The .zip files are for user-supplied libraries. For example I wrote one to do regular expressions:

On that page I mention a link to the .zip file.

Here is one of the Servo examples:

// Controlling a servo position using a potentiometer (variable resistor) 
// by Michal Rinott <http://people.interaction-ivrea.it/m.rinott> 

#include <Servo.h> 
 
Servo myservo;  // create servo object to control a servo 
 
int potpin = 0;  // analog pin used to connect the potentiometer
int val;    // variable to read the value from the analog pin 
 
void setup() 
{ 
  myservo.attach(9);  // attaches the servo on pin 9 to the servo object 
} 
 
void loop() 
{ 
  val = analogRead(potpin);            // reads the value of the potentiometer (value between 0 and 1023) 
  val = map(val, 0, 1023, 0, 179);     // scale it to use it with the servo (value between 0 and 180) 
  myservo.write(val);                  // sets the servo position according to the scaled value 
  delay(15);                           // waits for the servo to get there 
}

Don't overthink it. Just compile it and run it. It will find the library, you don't need to install or unzip anything.

10

Huh! It worked. Maybe I was getting to hung up on my BSD Unix days.

#include <Servo.h>

Servo myServo;

void setup()
{
myServo.attach(2);
myServo.write(90);
}

void loop()
{
delay(100);
}

. . .

Binary sketch size: 2,578 bytes (of a 32,256 byte maximum)

11