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Fix typos in the comments of the built-in examples

This commit is contained in:
per1234 2017-07-12 10:58:31 -07:00 committed by Cristian Maglie
parent 86c6103142
commit a71b40351f
59 changed files with 169 additions and 169 deletions

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@ -1,7 +1,7 @@
/* /*
AnalogReadSerial AnalogReadSerial
Reads an analog input on pin 0, prints the result to the serial monitor. Reads an analog input on pin 0, prints the result to the Serial Monitor.
Graphical representation is available using serial plotter (Tools > Serial Plotter menu) Graphical representation is available using Serial Plotter (Tools > Serial Plotter menu)
Attach the center pin of a potentiometer to pin A0, and the outside pins to +5V and ground. Attach the center pin of a potentiometer to pin A0, and the outside pins to +5V and ground.
This example code is in the public domain. This example code is in the public domain.

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@ -1,6 +1,6 @@
/* /*
Blink Blink
Turns on an LED on for one second, then off for one second, repeatedly. Turns an LED on for one second, then off for one second, repeatedly.
Most Arduinos have an on-board LED you can control. On the UNO, MEGA and ZERO Most Arduinos have an on-board LED you can control. On the UNO, MEGA and ZERO
it is attached to digital pin 13, on MKR1000 on pin 6. LED_BUILTIN is set to it is attached to digital pin 13, on MKR1000 on pin 6. LED_BUILTIN is set to

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@ -1,6 +1,6 @@
/* /*
DigitalReadSerial DigitalReadSerial
Reads a digital input on pin 2, prints the result to the serial monitor Reads a digital input on pin 2, prints the result to the Serial Monitor
This example code is in the public domain. This example code is in the public domain.
*/ */

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@ -1,7 +1,7 @@
/* /*
ReadAnalogVoltage ReadAnalogVoltage
Reads an analog input on pin 0, converts it to voltage, and prints the result to the serial monitor. Reads an analog input on pin 0, converts it to voltage, and prints the result to the Serial Monitor.
Graphical representation is available using serial plotter (Tools > Serial Plotter menu) Graphical representation is available using Serial Plotter (Tools > Serial Plotter menu)
Attach the center pin of a potentiometer to pin A0, and the outside pins to +5V and ground. Attach the center pin of a potentiometer to pin A0, and the outside pins to +5V and ground.
This example code is in the public domain. This example code is in the public domain.

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@ -1 +1 @@
Reads an analog input and prints the voltage to the serial monitor. Reads an analog input and prints the voltage to the Serial Monitor.

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@ -40,7 +40,7 @@ int ledState = HIGH; // the current state of the output pin
int buttonState; // the current reading from the input pin int buttonState; // the current reading from the input pin
int lastButtonState = LOW; // the previous reading from the input pin int lastButtonState = LOW; // the previous reading from the input pin
// the following variables are unsigned long's because the time, measured in miliseconds, // the following variables are unsigned longs because the time, measured in milliseconds,
// will quickly become a bigger number than can be stored in an int. // will quickly become a bigger number than can be stored in an int.
unsigned long lastDebounceTime = 0; // the last time the output pin was toggled unsigned long lastDebounceTime = 0; // the last time the output pin was toggled
unsigned long debounceDelay = 50; // the debounce time; increase if the output flickers unsigned long debounceDelay = 50; // the debounce time; increase if the output flickers

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@ -1,8 +1,8 @@
/* /*
Input Pullup Serial Input Pull-up Serial
This example demonstrates the use of pinMode(INPUT_PULLUP). It reads a This example demonstrates the use of pinMode(INPUT_PULLUP). It reads a
digital input on pin 2 and prints the results to the serial monitor. digital input on pin 2 and prints the results to the Serial Monitor.
The circuit: The circuit:
* Momentary switch attached from pin 2 to ground * Momentary switch attached from pin 2 to ground
@ -36,7 +36,7 @@ void loop() {
//print out the value of the pushbutton //print out the value of the pushbutton
Serial.println(sensorVal); Serial.println(sensorVal);
// Keep in mind the pullup means the pushbutton's // Keep in mind the pull-up means the pushbutton's
// logic is inverted. It goes HIGH when it's open, // logic is inverted. It goes HIGH when it's open,
// and LOW when it's pressed. Turn on pin 13 when the // and LOW when it's pressed. Turn on pin 13 when the
// button's pressed, and off when it's not: // button's pressed, and off when it's not:

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@ -53,14 +53,14 @@ void loop() {
// if the state has changed, increment the counter // if the state has changed, increment the counter
if (buttonState == HIGH) { if (buttonState == HIGH) {
// if the current state is HIGH then the button // if the current state is HIGH then the button
// wend from off to on: // went from off to on:
buttonPushCounter++; buttonPushCounter++;
Serial.println("on"); Serial.println("on");
Serial.print("number of button pushes: "); Serial.print("number of button pushes: ");
Serial.println(buttonPushCounter); Serial.println(buttonPushCounter);
} else { } else {
// if the current state is LOW then the button // if the current state is LOW then the button
// wend from on to off: // went from on to off:
Serial.println("off"); Serial.println("off");
} }
// Delay a little bit to avoid bouncing // Delay a little bit to avoid bouncing

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@ -3,7 +3,7 @@
Reads an analog input pin, maps the result to a range from 0 to 255 Reads an analog input pin, maps the result to a range from 0 to 255
and uses the result to set the pulse width modulation (PWM) of an output pin. and uses the result to set the pulse width modulation (PWM) of an output pin.
Also prints the results to the serial monitor. Also prints the results to the Serial Monitor.
The circuit: The circuit:
* potentiometer connected to analog pin 0. * potentiometer connected to analog pin 0.
@ -40,7 +40,7 @@ void loop() {
// change the analog out value: // change the analog out value:
analogWrite(analogOutPin, outputValue); analogWrite(analogOutPin, outputValue);
// print the results to the serial monitor: // print the results to the Serial Monitor:
Serial.print("sensor = "); Serial.print("sensor = ");
Serial.print(sensorValue); Serial.print(sensorValue);
Serial.print("\t output = "); Serial.print("\t output = ");

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@ -2,7 +2,7 @@
Mega analogWrite() test Mega analogWrite() test
This sketch fades LEDs up and down one at a time on digital pins 2 through 13. This sketch fades LEDs up and down one at a time on digital pins 2 through 13.
This sketch was written for the Arduino Mega, and will not work on previous boards. This sketch was written for the Arduino Mega, and will not work on other boards.
The circuit: The circuit:
* LEDs attached from pins 2 through 13 to ground. * LEDs attached from pins 2 through 13 to ground.
@ -34,7 +34,7 @@ void loop() {
analogWrite(thisPin, brightness); analogWrite(thisPin, brightness);
delay(2); delay(2);
} }
// fade the LED on thisPin from brithstest to off: // fade the LED on thisPin from brightest to off:
for (int brightness = 255; brightness >= 0; brightness--) { for (int brightness = 255; brightness >= 0; brightness--) {
analogWrite(thisPin, brightness); analogWrite(thisPin, brightness);
delay(2); delay(2);

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@ -24,7 +24,7 @@
// Define the number of samples to keep track of. The higher the number, // Define the number of samples to keep track of. The higher the number,
// the more the readings will be smoothed, but the slower the output will // the more the readings will be smoothed, but the slower the output will
// respond to the input. Using a constant rather than a normal variable lets // respond to the input. Using a constant rather than a normal variable lets
// use this value to determine the size of the readings array. // us use this value to determine the size of the readings array.
const int numReadings = 10; const int numReadings = 10;
int readings[numReadings]; // the readings from the analog input int readings[numReadings]; // the readings from the analog input

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@ -33,12 +33,12 @@ void setup() {
// first visible ASCIIcharacter '!' is number 33: // first visible ASCIIcharacter '!' is number 33:
int thisByte = 33; int thisByte = 33;
// you can also write ASCII characters in single quotes. // you can also write ASCII characters in single quotes.
// for example. '!' is the same as 33, so you could also use this: // for example, '!' is the same as 33, so you could also use this:
// int thisByte = '!'; // int thisByte = '!';
void loop() { void loop() {
// prints value unaltered, i.e. the raw binary version of the // prints value unaltered, i.e. the raw binary version of the
// byte. The serial monitor interprets all bytes as // byte. The Serial Monitor interprets all bytes as
// ASCII, so 33, the first number, will show up as '!' // ASCII, so 33, the first number, will show up as '!'
Serial.write(thisByte); Serial.write(thisByte);

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@ -1,7 +1,7 @@
/* /*
Dimmer Dimmer
Demonstrates the sending data from the computer to the Arduino board, Demonstrates sending data from the computer to the Arduino board,
in this case to control the brightness of an LED. The data is sent in this case to control the brightness of an LED. The data is sent
in individual bytes, each of which ranges from 0 to 255. Arduino in individual bytes, each of which ranges from 0 to 255. Arduino
reads these bytes and uses them to set the brightness of the LED. reads these bytes and uses them to set the brightness of the LED.

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@ -8,7 +8,7 @@
a USB cable. Bytes are sent one after another (serially) from the Arduino a USB cable. Bytes are sent one after another (serially) from the Arduino
to the computer. to the computer.
You can use the Arduino serial monitor to view the sent data, or it can You can use the Arduino Serial Monitor to view the sent data, or it can
be read by Processing, PD, Max/MSP, or any other program capable of reading be read by Processing, PD, Max/MSP, or any other program capable of reading
data from a serial port. The Processing code below graphs the data received data from a serial port. The Processing code below graphs the data received
so you can see the value of the analog input changing over time. so you can see the value of the analog input changing over time.
@ -67,7 +67,7 @@ void setup () {
// if using Processing 2.1 or later, use Serial.printArray() // if using Processing 2.1 or later, use Serial.printArray()
println(Serial.list()); println(Serial.list());
// I know that the first port in the serial list on my mac // I know that the first port in the serial list on my Mac
// is always my Arduino, so I open Serial.list()[0]. // is always my Arduino, so I open Serial.list()[0].
// Open whatever port is the one you're using. // Open whatever port is the one you're using.
myPort = new Serial(this, Serial.list()[0], 9600); myPort = new Serial(this, Serial.list()[0], 9600);
@ -75,7 +75,7 @@ void setup () {
// don't generate a serialEvent() unless you get a newline character: // don't generate a serialEvent() unless you get a newline character:
myPort.bufferUntil('\n'); myPort.bufferUntil('\n');
// set inital background: // set initial background:
background(0); background(0);
} }
void draw () { void draw () {

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@ -1,5 +1,5 @@
/* /*
Multple Serial test Multiple Serial test
Receives from the main serial port, sends to the others. Receives from the main serial port, sends to the others.
Receives from serial port 1, sends to the main serial (Serial 0). Receives from serial port 1, sends to the main serial (Serial 0).

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@ -6,7 +6,7 @@
it receives the character 'H', and turns off the LED when it it receives the character 'H', and turns off the LED when it
receives the character 'L'. receives the character 'L'.
The data can be sent from the Arduino serial monitor, or another The data can be sent from the Arduino Serial Monitor, or another
program like Processing (see code below), Flash (via a serial-net program like Processing (see code below), Flash (via a serial-net
proxy), PD, or Max/MSP. proxy), PD, or Max/MSP.
@ -108,7 +108,7 @@ void loop() {
port.write('H'); port.write('H');
} }
else { else {
// return the box to it's inactive state: // return the box to its inactive state:
stroke(153); stroke(153);
fill(153); fill(153);
// send an 'L' to turn the LED off: // send an 'L' to turn the LED off:

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@ -94,7 +94,7 @@ void setup() {
// if using Processing 2.1 or later, use Serial.printArray() // if using Processing 2.1 or later, use Serial.printArray()
println(Serial.list()); println(Serial.list());
// I know that the first port in the serial list on my mac // I know that the first port in the serial list on my Mac
// is always my FTDI adaptor, so I open Serial.list()[0]. // is always my FTDI adaptor, so I open Serial.list()[0].
// On Windows machines, this generally opens COM1. // On Windows machines, this generally opens COM1.
// Open whatever port is the one you're using. // Open whatever port is the one you're using.

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@ -54,7 +54,7 @@ void loop() {
firstSensor = analogRead(A0); firstSensor = analogRead(A0);
// read second analog input: // read second analog input:
secondSensor = analogRead(A1); secondSensor = analogRead(A1);
// read switch, map it to 0 or 255L // read switch, map it to 0 or 255
thirdSensor = map(digitalRead(2), 0, 1, 0, 255); thirdSensor = map(digitalRead(2), 0, 1, 0, 255);
// send sensor values: // send sensor values:
Serial.print(firstSensor); Serial.print(firstSensor);
@ -92,8 +92,8 @@ void setup() {
// if using Processing 2.1 or later, use Serial.printArray() // if using Processing 2.1 or later, use Serial.printArray()
println(Serial.list()); println(Serial.list());
// I know that the first port in the serial list on my mac // I know that the first port in the serial list on my Mac
// is always my Arduino module, so I open Serial.list()[0]. // is always my Arduino board, so I open Serial.list()[0].
// Change the 0 to the appropriate number of the serial port // Change the 0 to the appropriate number of the serial port
// that your microcontroller is attached to. // that your microcontroller is attached to.
myPort = new Serial(this, Serial.list()[0], 9600); myPort = new Serial(this, Serial.list()[0], 9600);

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@ -20,7 +20,7 @@
*/ */
String inputString = ""; // a string to hold incoming data String inputString = ""; // a String to hold incoming data
boolean stringComplete = false; // whether the string is complete boolean stringComplete = false; // whether the string is complete
void setup() { void setup() {

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@ -51,7 +51,7 @@ void setup() {
// if using Processing 2.1 or later, use Serial.printArray() // if using Processing 2.1 or later, use Serial.printArray()
println(Serial.list()); println(Serial.list());
// I know that the first port in the serial list on my mac // I know that the first port in the serial list on my Mac
// is always my Arduino, so I open Serial.list()[0]. // is always my Arduino, so I open Serial.list()[0].
// Open whatever port is the one you're using. // Open whatever port is the one you're using.
myPort = new Serial(this, Serial.list()[0], 9600); myPort = new Serial(this, Serial.list()[0], 9600);

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@ -5,9 +5,9 @@
statement allows you to choose from among a set of discrete values statement allows you to choose from among a set of discrete values
of a variable. It's like a series of if statements. of a variable. It's like a series of if statements.
To see this sketch in action, but the board and sensor in a well-lit To see this sketch in action, put the board and sensor in a well-lit
room, open the serial monitor, and and move your hand gradually room, open the Serial Monitor, and move your hand gradually down
down over the sensor. over the sensor.
The circuit: The circuit:
* photoresistor from analog in 0 to +5V * photoresistor from analog in 0 to +5V

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@ -35,7 +35,7 @@ void loop() {
int inByte = Serial.read(); int inByte = Serial.read();
// do something different depending on the character received. // do something different depending on the character received.
// The switch statement expects single number values for each case; // The switch statement expects single number values for each case;
// in this exmaple, though, you're using single quotes to tell // in this example, though, you're using single quotes to tell
// the controller to get the ASCII value for the character. For // the controller to get the ASCII value for the character. For
// example 'a' = 97, 'b' = 98, and so forth: // example 'a' = 97, 'b' = 98, and so forth:

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@ -4,7 +4,7 @@
Reads an Analog Devices ADXL3xx accelerometer and communicates the Reads an Analog Devices ADXL3xx accelerometer and communicates the
acceleration to the computer. The pins used are designed to be easily acceleration to the computer. The pins used are designed to be easily
compatible with the breakout boards from Sparkfun, available from: compatible with the breakout boards from SparkFun, available from:
http://www.sparkfun.com/commerce/categories.php?c=80 http://www.sparkfun.com/commerce/categories.php?c=80
http://www.arduino.cc/en/Tutorial/ADXL3xx http://www.arduino.cc/en/Tutorial/ADXL3xx

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@ -23,7 +23,7 @@
// these constants won't change: // these constants won't change:
const int ledPin = 13; // led connected to digital pin 13 const int ledPin = 13; // LED connected to digital pin 13
const int knockSensor = A0; // the piezo is connected to analog pin 0 const int knockSensor = A0; // the piezo is connected to analog pin 0
const int threshold = 100; // threshold value to decide when the detected sound is a knock or not const int threshold = 100; // threshold value to decide when the detected sound is a knock or not

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@ -2,7 +2,7 @@
Memsic2125 Memsic2125
Read the Memsic 2125 two-axis accelerometer. Converts the Read the Memsic 2125 two-axis accelerometer. Converts the
pulses output by the 2125 into milli-g's (1/1000 of earth's pulses output by the 2125 into milli-g's (1/1000 of Earth's
gravity) and prints them over the serial connection to the gravity) and prints them over the serial connection to the
computer. computer.
@ -48,7 +48,7 @@ void loop() {
// convert the pulse width into acceleration // convert the pulse width into acceleration
// accelerationX and accelerationY are in milli-g's: // accelerationX and accelerationY are in milli-g's:
// earth's gravity is 1000 milli-g's, or 1g. // Earth's gravity is 1000 milli-g's, or 1 g.
accelerationX = ((pulseX / 10) - 500) * 8; accelerationX = ((pulseX / 10) - 500) * 8;
accelerationY = ((pulseY / 10) - 500) * 8; accelerationY = ((pulseY / 10) - 500) * 8;

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@ -1,8 +1,8 @@
/* /*
Adding Strings together Adding Strings together
Examples of how to add strings together Examples of how to add Strings together
You can also add several different data types to string, as shown here: You can also add several different data types to String, as shown here:
created 27 July 2010 created 27 July 2010
modified 2 Apr 2012 modified 2 Apr 2012
@ -13,7 +13,7 @@
This example code is in the public domain. This example code is in the public domain.
*/ */
// declare three strings: // declare three Strings:
String stringOne, stringTwo, stringThree; String stringOne, stringTwo, stringThree;
void setup() { void setup() {
@ -27,40 +27,40 @@ void setup() {
stringTwo = String("this string"); stringTwo = String("this string");
stringThree = String(); stringThree = String();
// send an intro: // send an intro:
Serial.println("\n\nAdding strings together (concatenation):"); Serial.println("\n\nAdding Strings together (concatenation):");
Serial.println(); Serial.println();
} }
void loop() { void loop() {
// adding a constant integer to a string: // adding a constant integer to a String:
stringThree = stringOne + 123; stringThree = stringOne + 123;
Serial.println(stringThree); // prints "You added 123" Serial.println(stringThree); // prints "You added 123"
// adding a constant long interger to a string: // adding a constant long integer to a String:
stringThree = stringOne + 123456789; stringThree = stringOne + 123456789;
Serial.println(stringThree); // prints "You added 123456789" Serial.println(stringThree); // prints "You added 123456789"
// adding a constant character to a string: // adding a constant character to a String:
stringThree = stringOne + 'A'; stringThree = stringOne + 'A';
Serial.println(stringThree); // prints "You added A" Serial.println(stringThree); // prints "You added A"
// adding a constant string to a string: // adding a constant string to a String:
stringThree = stringOne + "abc"; stringThree = stringOne + "abc";
Serial.println(stringThree); // prints "You added abc" Serial.println(stringThree); // prints "You added abc"
stringThree = stringOne + stringTwo; stringThree = stringOne + stringTwo;
Serial.println(stringThree); // prints "You added this string" Serial.println(stringThree); // prints "You added this string"
// adding a variable integer to a string: // adding a variable integer to a String:
int sensorValue = analogRead(A0); int sensorValue = analogRead(A0);
stringOne = "Sensor value: "; stringOne = "Sensor value: ";
stringThree = stringOne + sensorValue; stringThree = stringOne + sensorValue;
Serial.println(stringThree); // prints "Sensor Value: 401" or whatever value analogRead(A0) has Serial.println(stringThree); // prints "Sensor Value: 401" or whatever value analogRead(A0) has
// adding a variable long integer to a string: // adding a variable long integer to a String:
stringOne = "millis() value: "; stringOne = "millis() value: ";
stringThree = stringOne + millis(); stringThree = stringOne + millis();
Serial.println(stringThree); // prints "The millis: 345345" or whatever value currentTime has Serial.println(stringThree); // prints "The millis: 345345" or whatever value millis() has
// do nothing while true: // do nothing while true:
while (true); while (true);

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@ -1,7 +1,7 @@
/* /*
Appending to Strings using the += operator and concat() Appending to Strings using the += operator and concat()
Examples of how to append different data types to strings Examples of how to append different data types to Strings
created 27 July 2010 created 27 July 2010
modified 2 Apr 2012 modified 2 Apr 2012
@ -24,34 +24,34 @@ void setup() {
stringOne = String("Sensor "); stringOne = String("Sensor ");
stringTwo = String("value"); stringTwo = String("value");
// send an intro: // send an intro:
Serial.println("\n\nAppending to a string:"); Serial.println("\n\nAppending to a String:");
Serial.println(); Serial.println();
} }
void loop() { void loop() {
Serial.println(stringOne); // prints "Sensor " Serial.println(stringOne); // prints "Sensor "
// adding a string to a string: // adding a string to a String:
stringOne += stringTwo; stringOne += stringTwo;
Serial.println(stringOne); // prints "Sensor value" Serial.println(stringOne); // prints "Sensor value"
// adding a constant string to a string: // adding a constant string to a String:
stringOne += " for input "; stringOne += " for input ";
Serial.println(stringOne); // prints "Sensor value for input" Serial.println(stringOne); // prints "Sensor value for input"
// adding a constant character to a string: // adding a constant character to a String:
stringOne += 'A'; stringOne += 'A';
Serial.println(stringOne); // prints "Sensor value for input A" Serial.println(stringOne); // prints "Sensor value for input A"
// adding a constant integer to a string: // adding a constant integer to a String:
stringOne += 0; stringOne += 0;
Serial.println(stringOne); // prints "Sensor value for input A0" Serial.println(stringOne); // prints "Sensor value for input A0"
// adding a constant string to a string: // adding a constant string to a String:
stringOne += ": "; stringOne += ": ";
Serial.println(stringOne); // prints "Sensor value for input" Serial.println(stringOne); // prints "Sensor value for input"
// adding a variable integer to a string: // adding a variable integer to a String:
stringOne += analogRead(A0); stringOne += analogRead(A0);
Serial.println(stringOne); // prints "Sensor value for input A0: 456" or whatever analogRead(A0) is Serial.println(stringOne); // prints "Sensor value for input A0: 456" or whatever analogRead(A0) is
@ -59,11 +59,11 @@ void loop() {
stringOne = "A long integer: "; stringOne = "A long integer: ";
stringTwo = "The millis(): "; stringTwo = "The millis(): ";
// adding a constant long integer to a string: // adding a constant long integer to a String:
stringOne += 123456789; stringOne += 123456789;
Serial.println(stringOne); // prints "A long integer: 123456789" Serial.println(stringOne); // prints "A long integer: 123456789"
// using concat() to add a long variable to a string: // using concat() to add a long variable to a String:
stringTwo.concat(millis()); stringTwo.concat(millis());
Serial.println(stringTwo); // prints "The millis(): 43534" or whatever the value of the millis() is Serial.println(stringTwo); // prints "The millis(): 43534" or whatever the value of the millis() is

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@ -1,7 +1,7 @@
/* /*
String Case changes String Case changes
Examples of how to change the case of a string Examples of how to change the case of a String
created 27 July 2010 created 27 July 2010
modified 2 Apr 2012 modified 2 Apr 2012

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@ -23,7 +23,7 @@ void setup() {
} }
void loop() { void loop() {
// make a string to report a sensor reading: // make a String to report a sensor reading:
String reportString = "SensorReading: 456"; String reportString = "SensorReading: 456";
Serial.println(reportString); Serial.println(reportString);
@ -36,7 +36,7 @@ void loop() {
// add blank space: // add blank space:
Serial.println(); Serial.println();
// you can alo set the character of a string. Change the : to a = character // you can also set the character of a String. Change the : to a = character
reportString.setCharAt(13, '='); reportString.setCharAt(13, '=');
Serial.println(reportString); Serial.println(reportString);

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@ -1,7 +1,7 @@
/* /*
Comparing Strings Comparing Strings
Examples of how to compare strings using the comparison operators Examples of how to compare Strings using the comparison operators
created 27 July 2010 created 27 July 2010
modified 2 Apr 2012 modified 2 Apr 2012
@ -31,22 +31,22 @@ void setup() {
} }
void loop() { void loop() {
// two strings equal: // two Strings equal:
if (stringOne == "this") { if (stringOne == "this") {
Serial.println("StringOne == \"this\""); Serial.println("StringOne == \"this\"");
} }
// two strings not equal: // two Strings not equal:
if (stringOne != stringTwo) { if (stringOne != stringTwo) {
Serial.println(stringOne + " =! " + stringTwo); Serial.println(stringOne + " =! " + stringTwo);
} }
// two strings not equal (case sensitivity matters): // two Strings not equal (case sensitivity matters):
stringOne = "This"; stringOne = "This";
stringTwo = "this"; stringTwo = "this";
if (stringOne != stringTwo) { if (stringOne != stringTwo) {
Serial.println(stringOne + " =! " + stringTwo); Serial.println(stringOne + " =! " + stringTwo);
} }
// you can also use equals() to see if two strings are the same: // you can also use equals() to see if two Strings are the same:
if (stringOne.equals(stringTwo)) { if (stringOne.equals(stringTwo)) {
Serial.println(stringOne + " equals " + stringTwo); Serial.println(stringOne + " equals " + stringTwo);
} else { } else {
@ -60,7 +60,7 @@ void loop() {
Serial.println(stringOne + " does not equal (ignoring case) " + stringTwo); Serial.println(stringOne + " does not equal (ignoring case) " + stringTwo);
} }
// a numeric string compared to the number it represents: // a numeric String compared to the number it represents:
stringOne = "1"; stringOne = "1";
int numberOne = 1; int numberOne = 1;
if (stringOne.toInt() == numberOne) { if (stringOne.toInt() == numberOne) {
@ -69,14 +69,14 @@ void loop() {
// two numeric strings compared: // two numeric Strings compared:
stringOne = "2"; stringOne = "2";
stringTwo = "1"; stringTwo = "1";
if (stringOne >= stringTwo) { if (stringOne >= stringTwo) {
Serial.println(stringOne + " >= " + stringTwo); Serial.println(stringOne + " >= " + stringTwo);
} }
// comparison operators can be used to compare strings for alphabetic sorting too: // comparison operators can be used to compare Strings for alphabetic sorting too:
stringOne = String("Brown"); stringOne = String("Brown");
if (stringOne < "Charles") { if (stringOne < "Charles") {
Serial.println(stringOne + " < Charles"); Serial.println(stringOne + " < Charles");
@ -95,9 +95,9 @@ void loop() {
Serial.println(stringOne + " >= Brow"); Serial.println(stringOne + " >= Brow");
} }
// the compareTo() operator also allows you to compare strings // the compareTo() operator also allows you to compare Strings
// it evaluates on the first character that's different. // it evaluates on the first character that's different.
// if the first character of the string you're comparing to // if the first character of the String you're comparing to
// comes first in alphanumeric order, then compareTo() is greater than 0: // comes first in alphanumeric order, then compareTo() is greater than 0:
stringOne = "Cucumber"; stringOne = "Cucumber";
stringTwo = "Cucuracha"; stringTwo = "Cucuracha";
@ -109,7 +109,7 @@ void loop() {
delay(10000); // because the next part is a loop: delay(10000); // because the next part is a loop:
// compareTo() is handy when you've got strings with numbers in them too: // compareTo() is handy when you've got Strings with numbers in them too:
while (true) { while (true) {
stringOne = "Sensor: "; stringOne = "Sensor: ";

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@ -1,7 +1,7 @@
/* /*
String constructors String constructors
Examples of how to create strings from other data types Examples of how to create Strings from other data types
created 27 July 2010 created 27 July 2010
modified 30 Aug 2011 modified 30 Aug 2011

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@ -26,7 +26,7 @@ void setup() {
void loop() { void loop() {
// indexOf() returns the position (i.e. index) of a particular character // indexOf() returns the position (i.e. index) of a particular character
// in a string. For example, if you were parsing HTML tags, you could use it: // in a String. For example, if you were parsing HTML tags, you could use it:
String stringOne = "<HTML><HEAD><BODY>"; String stringOne = "<HTML><HEAD><BODY>";
int firstClosingBracket = stringOne.indexOf('>'); int firstClosingBracket = stringOne.indexOf('>');
Serial.println("The index of > in the string " + stringOne + " is " + firstClosingBracket); Serial.println("The index of > in the string " + stringOne + " is " + firstClosingBracket);

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@ -1,7 +1,7 @@
/* /*
String replace() String replace()
Examples of how to replace characters or substrings of a string Examples of how to replace characters or substrings of a String
created 27 July 2010 created 27 July 2010
modified 2 Apr 2012 modified 2 Apr 2012
@ -28,7 +28,7 @@ void loop() {
String stringOne = "<html><head><body>"; String stringOne = "<html><head><body>";
Serial.println(stringOne); Serial.println(stringOne);
// replace() changes all instances of one substring with another: // replace() changes all instances of one substring with another:
// first, make a copy of th original string: // first, make a copy of the original string:
String stringTwo = stringOne; String stringTwo = stringOne;
// then perform the replacements: // then perform the replacements:
stringTwo.replace("<", "</"); stringTwo.replace("<", "</");

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@ -36,7 +36,7 @@ int platform = OSX;
void setup() { void setup() {
// make pin 2 an input and turn on the // make pin 2 an input and turn on the
// pullup resistor so it goes high unless // pull-up resistor so it goes high unless
// connected to ground: // connected to ground:
pinMode(2, INPUT_PULLUP); pinMode(2, INPUT_PULLUP);
Keyboard.begin(); Keyboard.begin();

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@ -39,7 +39,7 @@ char ctrlKey = KEY_LEFT_GUI;
void setup() { void setup() {
// make pin 2 an input and turn on the // make pin 2 an input and turn on the
// pullup resistor so it goes high unless // pull-up resistor so it goes high unless
// connected to ground: // connected to ground:
pinMode(2, INPUT_PULLUP); pinMode(2, INPUT_PULLUP);
// initialize control over the keyboard: // initialize control over the keyboard:

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@ -20,7 +20,7 @@
// named constant for the pin the sensor is connected to // named constant for the pin the sensor is connected to
const int sensorPin = A0; const int sensorPin = A0;
// room temperature in Celcius // room temperature in Celsius
const float baselineTemp = 20.0; const float baselineTemp = 20.0;
void setup() { void setup() {
@ -53,7 +53,7 @@ void loop() {
// convert the voltage to temperature in degrees C // convert the voltage to temperature in degrees C
// the sensor changes 10 mV per degree // the sensor changes 10 mV per degree
// the datasheet says there's a 500 mV offset // the datasheet says there's a 500 mV offset
// ((volatge - 500mV) times 100) // ((voltage - 500 mV) times 100)
Serial.print(", degrees C: "); Serial.print(", degrees C: ");
float temperature = (voltage - .5) * 100; float temperature = (voltage - .5) * 100;
Serial.println(temperature); Serial.println(temperature);

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@ -62,7 +62,7 @@ void loop() {
// read the value from the blue-filtered photoresistor: // read the value from the blue-filtered photoresistor:
blueSensorValue = analogRead(blueSensorPin); blueSensorValue = analogRead(blueSensorPin);
// print out the values to the serial monitor // print out the values to the Serial Monitor
Serial.print("raw sensor Values \t red: "); Serial.print("raw sensor Values \t red: ");
Serial.print(redSensorValue); Serial.print(redSensorValue);
Serial.print("\t green: "); Serial.print("\t green: ");

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@ -18,7 +18,7 @@
This example code is part of the public domain This example code is part of the public domain
*/ */
// include the servo library // include the Servo library
#include <Servo.h> #include <Servo.h>
Servo myServo; // create a servo object Servo myServo; // create a servo object
@ -34,7 +34,7 @@ void setup() {
void loop() { void loop() {
potVal = analogRead(potPin); // read the value of the potentiometer potVal = analogRead(potPin); // read the value of the potentiometer
// print out the value to the serial monitor // print out the value to the Serial Monitor
Serial.print("potVal: "); Serial.print("potVal: ");
Serial.print(potVal); Serial.print(potVal);

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@ -30,7 +30,7 @@ const int onOffSwitchStateSwitchPin = 5; // connected to the switch for turning
const int potPin = A0; // connected to the potentiometer's output const int potPin = A0; // connected to the potentiometer's output
// create some variables to hold values from your inputs // create some variables to hold values from your inputs
int onOffSwitchState = 0; // current state of the On/Off switch int onOffSwitchState = 0; // current state of the on/off switch
int previousOnOffSwitchState = 0; // previous position of the on/off switch int previousOnOffSwitchState = 0; // previous position of the on/off switch
int directionSwitchState = 0; // current state of the direction switch int directionSwitchState = 0; // current state of the direction switch
int previousDirectionSwitchState = 0; // previous state of the direction switch int previousDirectionSwitchState = 0; // previous state of the direction switch
@ -40,7 +40,7 @@ int motorSpeed = 0; // speed of the motor
int motorDirection = 1; // current direction of the motor int motorDirection = 1; // current direction of the motor
void setup() { void setup() {
// intialize the inputs and outputs // initialize the inputs and outputs
pinMode(directionSwitchPin, INPUT); pinMode(directionSwitchPin, INPUT);
pinMode(onOffSwitchStateSwitchPin, INPUT); pinMode(onOffSwitchStateSwitchPin, INPUT);
pinMode(controlPin1, OUTPUT); pinMode(controlPin1, OUTPUT);
@ -97,7 +97,7 @@ void loop() {
//turn the motor off //turn the motor off
analogWrite(enablePin, 0); analogWrite(enablePin, 0);
} }
// save the current On/Offswitch state as the previous // save the current on/off switch state as the previous
previousDirectionSwitchState = directionSwitchState; previousDirectionSwitchState = directionSwitchState;
// save the current switch state as the previous // save the current switch state as the previous
previousOnOffSwitchState = onOffSwitchState; previousOnOffSwitchState = onOffSwitchState;

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@ -27,10 +27,10 @@
// initialize the library with the numbers of the interface pins // initialize the library with the numbers of the interface pins
LiquidCrystal lcd(12, 11, 5, 4, 3, 2); LiquidCrystal lcd(12, 11, 5, 4, 3, 2);
// set up a constant for the tilt switchPin // set up a constant for the tilt switch pin
const int switchPin = 6; const int switchPin = 6;
// variable to hold the value of the switchPin // variable to hold the value of the switch pin
int switchState = 0; int switchState = 0;
// variable to hold previous value of the switch pin // variable to hold previous value of the switch pin
@ -76,7 +76,7 @@ void loop() {
// move the cursor to the second line // move the cursor to the second line
lcd.setCursor(0, 1); lcd.setCursor(0, 1);
// choose a saying to print baed on the value in reply // choose a saying to print based on the value in reply
switch (reply) { switch (reply) {
case 0: case 0:
lcd.print("Yes"); lcd.print("Yes");

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@ -28,7 +28,7 @@
// import the library // import the library
#include <Servo.h> #include <Servo.h>
// create an instance of the servo library // create an instance of the Servo library
Servo myServo; Servo myServo;
const int piezo = A0; // pin the piezo is attached to const int piezo = A0; // pin the piezo is attached to
@ -72,7 +72,7 @@ void setup() {
// move the servo to the unlocked position // move the servo to the unlocked position
myServo.write(0); myServo.write(0);
// print status to the serial monitor // print status to the Serial Monitor
Serial.println("the box is unlocked!"); Serial.println("the box is unlocked!");
} }

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@ -10,7 +10,7 @@
Software required : Software required :
Processing (3.0 or newer) http://processing.org Processing (3.0 or newer) http://processing.org
Active internet connection Active Internet connection
Created 18 September 2012 Created 18 September 2012
by Scott Fitzgerald by Scott Fitzgerald
@ -34,7 +34,7 @@ void loop() {
} }
/* Processing code for this example /* Processing code for this example
// Tweak the Arduno Logo // Tweak the Arduino Logo
// by Scott Fitzgerald // by Scott Fitzgerald
// This example code is in the public domain // This example code is in the public domain
@ -63,12 +63,12 @@ void setup() {
surface.setSize(logo.width, logo.height); surface.setSize(logo.width, logo.height);
// print a list of available serial ports to the // print a list of available serial ports to the
// Processing staus window // Processing status window
println("Available serial ports:"); println("Available serial ports:");
println(Serial.list()); println(Serial.list());
// Tell the serial object the information it needs to communicate // Tell the serial object the information it needs to communicate
// with the Arduno. Change Serial.list()[0] to the correct // with the Arduino. Change Serial.list()[0] to the correct
// port corresponding to your Arduino board. The last // port corresponding to your Arduino board. The last
// parameter (e.g. 9600) is the speed of the communication. It // parameter (e.g. 9600) is the speed of the communication. It
// has to correspond to the value passed to Serial.begin() in your // has to correspond to the value passed to Serial.begin() in your

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@ -6,7 +6,7 @@
Arduino Starter Kit Arduino Starter Kit
Parts required: Parts required:
batery powered component battery powered component
220 ohm resistor 220 ohm resistor
4N35 optocoupler 4N35 optocoupler

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@ -4,11 +4,11 @@
// http://www.opensource.org/licenses/bsd-license.php // http://www.opensource.org/licenses/bsd-license.php
// //
// This sketch turns the Arduino into a AVRISP // This sketch turns the Arduino into a AVRISP
// using the following arduino pins: // using the following Arduino pins:
// //
// Pin 10 is used to reset the target microcontroller. // Pin 10 is used to reset the target microcontroller.
// //
// By default, the hardware SPI pins MISO, MOSI and SCK pins are used // By default, the hardware SPI pins MISO, MOSI and SCK are used
// to communicate with the target. On all Arduinos, these pins can be found // to communicate with the target. On all Arduinos, these pins can be found
// on the ICSP/SPI header: // on the ICSP/SPI header:
// //
@ -20,7 +20,7 @@
// as digital pin 11, 12 and 13, respectively. That is why many tutorials // as digital pin 11, 12 and 13, respectively. That is why many tutorials
// instruct you to hook up the target to these pins. If you find this wiring // instruct you to hook up the target to these pins. If you find this wiring
// more practical, have a define USE_OLD_STYLE_WIRING. This will work even // more practical, have a define USE_OLD_STYLE_WIRING. This will work even
// even when not using an Uno. (On an Uno this is not needed). // when not using an Uno. (On an Uno this is not needed).
// //
// Alternatively you can use any other digital pin by configuring software ('BitBanged') // Alternatively you can use any other digital pin by configuring software ('BitBanged')
// SPI and having appropriate defines for PIN_MOSI, PIN_MISO and PIN_SCK. // SPI and having appropriate defines for PIN_MOSI, PIN_MISO and PIN_SCK.
@ -43,18 +43,18 @@
#define PROG_FLICKER true #define PROG_FLICKER true
// Configure SPI clock (in Hz). // Configure SPI clock (in Hz).
// E.g. for an attiny @128 kHz: the datasheet states that both the high // E.g. for an ATtiny @ 128 kHz: the datasheet states that both the high
// and low spi clock pulse must be > 2 cpu cycles, so take 3 cycles i.e. // and low SPI clock pulse must be > 2 CPU cycles, so take 3 cycles i.e.
// divide target f_cpu by 6: // divide target f_cpu by 6:
// #define SPI_CLOCK (128000/6) // #define SPI_CLOCK (128000/6)
// //
// A clock slow enough for an attiny85 @ 1MHz, is a reasonable default: // A clock slow enough for an ATtiny85 @ 1 MHz, is a reasonable default:
#define SPI_CLOCK (1000000/6) #define SPI_CLOCK (1000000/6)
// Select hardware or software SPI, depending on SPI clock. // Select hardware or software SPI, depending on SPI clock.
// Currently only for AVR, for other archs (Due, Zero,...), // Currently only for AVR, for other architectures (Due, Zero,...),
// hardware SPI is probably too fast anyway. // hardware SPI is probably too fast anyway.
#if defined(ARDUINO_ARCH_AVR) #if defined(ARDUINO_ARCH_AVR)
@ -88,7 +88,7 @@
#endif #endif
// HOODLOADER2 means running sketches on the atmega16u2 // HOODLOADER2 means running sketches on the ATmega16U2
// serial converter chips on Uno or Mega boards. // serial converter chips on Uno or Mega boards.
// We must use pins that are broken out: // We must use pins that are broken out:
#else #else
@ -371,7 +371,7 @@ void get_version(uint8_t c) {
} }
void set_parameters() { void set_parameters() {
// call this after reading paramter packet into buff[] // call this after reading parameter packet into buff[]
param.devicecode = buff[0]; param.devicecode = buff[0];
param.revision = buff[1]; param.revision = buff[1];
param.progtype = buff[2]; param.progtype = buff[2];
@ -393,7 +393,7 @@ void set_parameters() {
+ buff[18] * 0x00000100 + buff[18] * 0x00000100
+ buff[19]; + buff[19];
// avr devices have active low reset, at89sx are active high // AVR devices have active low reset, AT89Sx are active high
rst_active_high = (param.devicecode >= 0xe0); rst_active_high = (param.devicecode >= 0xe0);
} }
@ -404,7 +404,7 @@ void start_pmode() {
// SPI.begin() will configure SS as output, // SPI.begin() will configure SS as output,
// so SPI master mode is selected. // so SPI master mode is selected.
// We have defined RESET as pin 10, // We have defined RESET as pin 10,
// which for many arduino's is not the SS pin. // which for many Arduinos is not the SS pin.
// So we have to configure RESET as output here, // So we have to configure RESET as output here,
// (reset_target() first sets the correct level) // (reset_target() first sets the correct level)
reset_target(true); reset_target(true);
@ -412,11 +412,11 @@ void start_pmode() {
SPI.begin(); SPI.begin();
SPI.beginTransaction(SPISettings(SPI_CLOCK, MSBFIRST, SPI_MODE0)); SPI.beginTransaction(SPISettings(SPI_CLOCK, MSBFIRST, SPI_MODE0));
// See avr datasheets, chapter "SERIAL_PRG Programming Algorithm": // See AVR datasheets, chapter "SERIAL_PRG Programming Algorithm":
// Pulse RESET after PIN_SCK is low: // Pulse RESET after PIN_SCK is low:
digitalWrite(PIN_SCK, LOW); digitalWrite(PIN_SCK, LOW);
delay(20); // discharge PIN_SCK, value arbitrally chosen delay(20); // discharge PIN_SCK, value arbitrarily chosen
reset_target(false); reset_target(false);
// Pulse must be minimum 2 target CPU clock cycles // Pulse must be minimum 2 target CPU clock cycles
// so 100 usec is ok for CPU speeds above 20 KHz // so 100 usec is ok for CPU speeds above 20 KHz