• Esplora TFT Bitmap Logo: Read an image file from a micro-SD card and draw it at random locations.
• Esplora TFT Color Picker: Using the joystick and slider, change the color of the TFT screen
• Esplora TFT Etch a Sketch: An Esplora implementation of the classic Etch-a-Sketch
• Esplora TFT Graph: Graph the values from the light sensor to the TFT
• Esplora TFT Horizon: Draw an artificial horizon line based on the tilt from the accelerometer
• Esplora TFT Pong: A basic implementation of the classic game
• Esplora TFT Temperature: Check the temperature with the onboard sensor and display it on screen

• TFT Bitmap Logo: Read an image file from a micro-SD card and draw it at random locations.
• TFT Display Text : Read the value of a sensor and print it on the screen.
• TFT Pong: An Arduino implementation of the classic game
• Etch a Sketch: An Arduino version of the classic Etch-a-Sketch
• Color Picker: With three sensors, change the color of the TFT screen
• Graph: Graph the values from a variable resistor to the TFT

Robot Library

• Logo - tell your robot where to go through the on-board keyboard
• Line Following - draw a racing track and get your robot to run on it
• Disco Bot - turn your robot into an 8-bit jukebox and dance to the beat
• Compass - plan a treasure hunt with this digital compass
• Inputs - learn how to control the knob and the keyboard
• Wheel Calibration - tune the wheels to perform even better
• Runaway Robot - play tag with your robot using a distance sensor
• Remote control - reuse that old tv-remote to command the bot on distance
• Picture browser - want to use your own images? This is how
• Rescue - train your robot to look for hidden pearls in a maze
• Hello User - hack the robot's welcome demo and make your own

TFT Library

The TFT library has Arduino and Esplora-compatible examples
Esplora

• Esplora TFT Bitmap Logo?: Read an image file from a micro-SD card and draw it at random locations.
• Esplora TFT Color Picker?: Using the joystick and slider, change the color of the TFT screen
• Esplora TFT Etch a Sketch?: An Esplora implementation of the classic Etch-a-Sketch
• Esplora TFT Graph?: Graph the values from the light sensor to the TFT
• Esplora TFT Horizon?: Draw an artificial horizon line based on the tilt from the accelerometer
• Esplora TFT Pong?: A basic implementation of the classic game
• Esplora TFT Temperature?: Check the temperature with the onboard sensor and display it on screen

Arduino

• TFT Bitmap Logo?: Read an image file from a micro-SD card and draw it at random locations.
• TFT Display Text? : Read the value of a sensor and print it on the screen.
• TFT Pong?: An Arduino implementation of the classic game
• Etch a Sketch?: An Arduino version of the classic Etch-a-Sketch
• Color Picker?: With three sensors, change the color of the TFT screen
• Graph?: Graph the values from a variable resistor to the TFT

Esplora Library

Esplora Beginner examples

• EsploraBlink : Blink the Esplora's RGB LED
• EsploraAccelerometer : Read the values from the accelerometer
• EsploraJoystickMouse : Use the Esplora's joystick to control the cursor on your computer
• EsploraLedShow : Use the Joystick and slider to create a light show with the LED
• EsploraLedShow2 : Use the Esplora's microphone, linear potentiometer, and light sensor to change the color of the onboard LED.
• EsploraLightCalibrator : Read the values from the accelerometer
• EsploraMusic : Make some music with the Esplora
• EsploraSoundSensor : Read the values from the Esplora's microphone
• EsploraTemperatureSensor : Read the temperature sensor and get the temperature in in Farhenheit or Celsius.

Esplora Expert examples

• EsploraKart : Use the Esplora as a controller to play a kart racing game.
• EsploraTable : Print the Esplora sensor information to a table format.
• EsploraRemote : Connect the Esplora to Processing and control the outputs.
• EsploraPong : Play Pong with the Esplora using Processing.

GSM Library

GSM Examples

• Make Voice Call: get your shield to make phone calls from the Serial Monitor
• Receive Voice Call: check the status of the modem while getting voice calls
• Send SMS: use the Serial Monitor to type in SMS messages to different phone numbers
• Receive SMS: read SMS messages and prompt them to the Serial Monitor
• Web Client: download the content of a website to your Arduino board through GPRS
• Web Server: create a wireless web server through GPRS
• Twitter Client: read Twitter from anywhere
• Pachube Client: communicate to the Pachube sensor backbone
• Pachube Client String: communicate to the Pachube sensor backbone

GSM Tools

• Test Modem: read the IMEI of your modem
• Test GPRS: test the proper functionality of the GPRS network using your SIM card
• GSM Scan Networks: check for the available networks
• Pin Management: manage the PIN number of your SIM card
• Band Management: manage the band the GSM shield connects to.
• Test Web Server: Create a webserver with your GSM shield

Beginners

• EsploraBlink : Blink the Esplora's RGB LED
• EsploraAccelerometer : Read the values from the accelerometer
• EsploraJoystickMouse : Use the Esplora's joystick to control the cursor on your computer
• EsploraLedShow : Use the Joystick and slider to create a light show with the LED
• EsploraLedShow2 : Use the Esplora's microphone, linear potentiometer, and light sensor to change the color of the onboard LED.
• EsploraLightCalibrator : Read the values from the accelerometer
• EsploraMusic : Make some music with the Esplora
• EsploraSoundSensor : Read the values from the Esplora's microphone
• EsploraTemperatureSensor : Read the temperature sensor and get the temperature in in Farhenheit or Celsius.

Experts

• EsploraKart : Use the Esplora as a controller to play a kart racing game.
• EsploraTable : Print the Esplora sensor information to a table format.
• EsploraRemote : Connect the Esplora to Processing and control the outputs.
• EsploraPong : Play Pong with the Esplora using Processing.

• EsploraRemote: remote your Esplora on a processing application.

Esplora Library

• EsploraKart: transform your esplora in a video-game controller.
• EsploraTable: save the readings of the accelerometer on a spreadsheet.
• EsploraSlave?: remote your Esplora on a processing application.
• EsploraLedShow: change the color of the RGB led with the joystick and the slider.
• EsploraLedShow2: change the color of the RGB led with the readings from the light sensor, microphone and slider.
• EsploraMusic: use the Esplora as a musical instrument.

• KeyboardAndMouseControl: Demonstrates the Mouse and Keyboard commands in one program.

(:if false:)

(:ifend:)

9.USB (Leonardo, Micro, and Due specific examples)

The Keyboard and Mouse examples are unique to the Leonardo, Micro and Due. They demonstrate the use of libraries that are unique to the board.

• MouseContinuousDrawing: Controls the mouse computer's cursor movement with two potentiometers, for drawing continuous lines on the screen, like an Etch-a-sketch.

9.USB (Leonardo and Due specific examples)

• PachubeClient: connect to pachube.com, a free datalogging site.
• PachubeClientString: send strings to pachube.com.

• PachubeClient: connect to Cosm.com, a free datalogging site.
• PachubeClientString: send strings to Cosm.com.

The WiFi Library will be included in a future release of the Arduino IDE. You can download the most recent version, and install it as you would any other library.

The WiFi Library will be included in a future release of the Arduino IDE. You can download the most recent version?, and install it as you would any other library.

The WiFi Library will be included in a future release of the Arduino IDE. You can download the most recent version, and install it as you would any other library.

The WiFi Library will be included in a future version of the Arduino IDE. You can download the most recent version, and install it as you would any other library.

The WiFi Library will be bundled with a future version of the Arduino IDE. Currently, you may download it from here, and install it as you would any other library.

• MouseContinuousDrawing: Controls the mouse computer's cursor movement with two potentiometers, for drawing continuous lines on the screen, like in the famous game Etch-a-sketch.

• MouseContinousDrawing?: Controls the mouse computer's cursor movement with two potentiometers, for drawing continuous lines on the screen, like in the famous game Etch-a-sketch.

(:if false:)

(:ifend:)

• CosmClient: connect to Cosm.com, a free datalogging site.
• CosmClientString: send strings to Cosm.com.

9.USB (Leonardo specific examples)

• KeybaordAndMouseControl: Demonstrates the Mouse and Keyboard commands in one program.

Keyboard

• KeyboardLogout : Logs out the current user with key commands

• KeyboardReprogram : opens a new window in the Arduino IDE and reprograms the Leonardo with a simple blink program

Mouse

• ButtonMouseControl: Control cursor movement with 5 pushbuttons.

• WebClientRepeating: Make repeated HTTP requests.

(:include WiFiTutorialSeeAlsoInclude:)

WiFi Library

• ConnectNoEncryption : Demonstrates how to connect to an open network
• ConnectWithWEP : Demonstrates how to connect to a network that is encrypted with WEP
• ConnectWithWPA : Demonstrates how to connect to a network that is encrypted with WPA2 Personal
• ScanNetworks : Displays all WiFi networks in range
• WiFiChatServer : Set up a simple chat server
• WiFiPachubeClient : connect to Pachube.com, a free datalogging site
• WiFiPachubeClientString: send strings to Pachube.com
• WiFiTwitterClient : A Twitter client with Strings
• WiFiWebClient : Connect to a remote webserver
• WiFiWebServer : Serve a webpage from the WiFi shield

(:tableend:)

• ReadASCIIString: parse a comma-separated string of ints to fade an LED

(:include DigitalSeeAlsoIncludes:)

• Input Pullup Serial: Demonstrates the use of INPUT_PULLUP with pinMode().

Leonardo specific examples

The Keyboard and Mouse examples are specific to the Leonardo, they demonstrate the use of libraries that are unique to the board.

9.Keyboard

• KeyboardMessage: Sends a text string when a button is pressed.
• KeyboardSerial: Reads a byte from the serial port, and sends back a keystroke.

10.Mouse

• JoystickMouseControl: Controls a computer's cursor movement with a Joystick when a button is pressed.

• SerialEvent: Demonstrates the use of SerialEvent().

Leonardo specific examples

The Keyboard and Mouse examples are specific to the Leonardo, they demonstrate the use of libraries that are unique to the board.

Leonardo specific Libraries

These libraries are specific to the Arduino Leonardo Board.

Keyboard

• KeyboardSerial: Reads a byte from the serial port, and sends back a keystroke.
• KeyboardMessage: Sends a text string when a button is pressed.

Mouse

• JoystickMouseControl: Controls a computer's cursor movement with a Joystick when a button is pressed.

• PachubeClient: connect to Pachube.com, a free datalogging site.
• PachubeClientString: send strings to Pachube.com.

Note: these examples are written for Arduino 1.0 and later. Certain functions may not work in earlier versions. For best results, download the latest version.

• DnsWebClient: DNS and DHCP-based Web client.
• DhcpChatServer: A simple DHCP Chat Server
• DhcpAddressPrinter: Get an IP address via DHCP and print it out
• TwitterClient: A Twitter client with Strings
• TelnetClient: A simple Telnet client

• Software Serial Example: how to use the SoftwareSerial Library...Because sometimes one serial port just isn't enough!
• Two Port Receive: how to work with multiple software serial ports.

• TwoPortReceive: how to work with multiple software serial ports.

ArduinoISP turns your Arduino into an in-circuit programmer to re-program Atmega chips. Useful when you need to re-load the bootloader on an Arduino, if you're going from Arduino to an Atmega on a breadboard, or if you're making your own Arduino-compatible circuit on a breadboard.

(:table:)

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(:tableend:)

These examples include code that allows the Arduino to talk to Processing sketches running on the computer. For more information or to download Processing, see processing.org. There are also Max/MSP patches that can communicate with each Arduino sketch as well. For more on Max/MSP see Cycling 74. For Pd patches that can communicate with these sketches, see Scott Fitzgerald's examples.

Note: these examples are written for Arduino version 0020 and later. Certain functions, like the String functions, or the use of A0 through A5 to refer to analog pins, may not work in earlier versions. For best results, download the latest version.

Note: these examples are written for Arduino version 0020 and later. Certain functions, like the String functions, or the use of A0 through A5 to refer to analog pins, may not work in earlier versions. For best results, [[Main/Software| download the latest version.

Software Serial Library

EEPROM Library

Libraries

• UDPSendReceiveString: Send and receive text strings via UDP.
• UdpNtpClient: Query a Network Time Protocol (NTP) server using UDP.

• Guide to the Standard Firmata Library

• Guide to the Standard Firmata Library:

• Guide to the Standard Firmata Library:

• Standard Firmata w/Processing: Input?:
• Standard Firmata w/Processing: Output?:
• Standard Firmata w/Processing: PWM Output?:

(:divend:)

• Simple Software Serial: how to use the SoftwareSerial Library...Because sometimes one serial port just isn't enough!

• BarometricPressureSensor: read air pressure and temperature from a sensor using the SPI protocol.
• SPIDigitalPot: control a AD5206 digital potentiometer using the SPI protocol.

SoftwareSerial Library

• Simple Software Serial: a straightforward example illustrating how to use the SoftwareSerial Library...Because sometimes one serial port just isn't enough!

• digital_potentiometer: control a AD5171 digital pot using the Wire Library.

8.Strings

8.String Library

EEPROM Library

Firmata Libraries

Matrix Library

• Motor Knob: control a highly accurate stepper motor using a potentiometer.

• digital_potentiometer: control a an AD5171 digital pot using the Wire Library.

• SFRRanger_reader: read a Devantech SRFxx ultra-sonic range finder using I2C communication.
• digital_potentiometer: control a an AD5171 digital potentiometer.
• master reader/slave sender: set up two (or more) arduino boards to share information via a master reader/slave sender configuration.
• master writer/slave reader: allow two (or more) arduino boards to share information using a master writer/slave reader set up.

• MultiSerialMega: use two of the serial ports available on the Arduino Mega.

• Button State Change: counting the number of button pushes.

• master writer/slave reader

• master writer/slave sender

• master reader/slave sender
• slave sender?

• LED Bar Graph: how to make an LED bar graph.

• LED Bar Graph?: how to make an LED bar graph.

• StringLength & StringLengthTrim: get and trim the length of a string.

(:include BasicsSeeAlsoIncludes:)

(include BasicsSeeAlsoIncludes

)

• Blink Without Delay: blinking an LED without using the delay() function.
• Button: use a pushbutton to control an LED.
• Debounce: read a pushbutton, filtering noise.
• Button State Change counting the number of button pushes.
• Tone: play a melody with a Piezo speaker.
• Pitch follower: play a pitch on a piezo speaker depending on an analog input.
• Simple Keyboard: a three-key musical keyboard using force sensors and a piezo speaker.
• Tone4: play tones on multiple speakers sequentially using the tone() command.

(:include DigitalSeeAlsoIncludes:)

(:include BasicsSeeAlsoIncludes:)

(include BasicsSeeAlsoIncludes

)

• UDPSendReceiveString Send and receive text strings via UDP.
• UdpNtpClient Query a Network Time Protocol (NTP) server using UDP.

• Blink - turn an LED on and off.

• MIDI: send MIDI note messages serially.

• Physical Pixel: turn a LED on and off by sending data to your Arduino from Processing or Max/MSP.

• Serial input (Switch (case) Statement): how to take different actions based on characters received by the serial port.

• Serial input (Switch (case) Statement: how to take different actions based on characters received by the serial port.

• Graph: send data to the computer and graph it in Processing.
• Physical Pixel: turn and LED on and off by sending data to your Arduino from Processing or Max/MSP.
• Virtual Color Mixer: send multiple variables from Arduino to your computer and read them in Processing or Max/MSP.
• Serial Call Response: send multiple vairables using a call-and-response (handshaking) method.
• Serial Call Response ASCII: send multiple variables using a call-and-response (handshaking) method, and ASCII-encode the values before sending.
• Serial input (SwitchCase2): how to take different actions based on characters received by the serial port.

• AnalogWriteMega: fade 12 LEDs on and off, one by one, using an Arduino Mega board.

• AnalogWriteMega: fade 12 LEDs up and the down, one by one, using an Arduino Mega board.

• Fading: use an analog output (PWM pin) to fade an LED.

• BareMinimum - bare minimum code needed to start a sketch.

• DigitalReadSerial - read a switch, print the state out to the Serial Monitor.
• AnalogReadSerial - read a potentiometer, print the state out to the Serial Monitor.
• Fade - demonstrates the use of analog output to fade an LED.

• AnalogInOutSerial: read an analog input pin, map the result, and then use that data to dim or brighten an LED.

• AnalogWriteMega: fades12 LEDs up and the down, one by one, using an Arduino Mega board.
• Calibration: define a maximum and minimum for expected analog sensor values.

• Fading: uses an analog output (PWM pin) to fade an LED.

• Calibration: define a maximum and minimum for expected analog sensor values

 * Fading: uses an analog output (PWM pin) to fade an LED.

• AnalogInOutSerial: read an analog input pin, map the result, and then use that data to dim or brighten an LED
• AnalogInSerial:

• AnalogWriteMega: fades12 LEDs up and the down, one by one, on an Arduino Mega board

• Blink? - turn an LED on and off.
• DigitalReadSerial - read a switch, print the state out to the Serial Monitor
• AnalogReadSerial - read a potentiometer, print the state out to the Serial Monitor
• Fade - demonstrates the use of analog output to fade an LED

• Fade - Demonstrates the use of analog output to fade an LED

• Simple Fade? - Demonstrates the use of analog output to fade an LED

• BareMinimum - bare minimum code needed to start a sketch

• DigitalReadSerial - Read a switch, print the state out to the Serial Monitor
• AnalogReadSerial - Read a potentiometer, print the state out to the Serial Monitor
• Fade - read a potentiometer, use the result to fade an LED

• AnalogReadSerial

• BarometricPressureWebServer: outputs the values from a barometric pressure sensor as a web page.

• Button State Change counting the number of button pushes.

• Pitch follower: play a pitch on a piezo speaker depending on an analog input.

• Calibration: for analog sensor readings.

• Memsic2125 : two-axis acceleromoter.
• Ping: detecting objects with an ultrasonic range finder.

• LED Bar Graph: how to make an LED bar graph.
• Row Column Scanning: how to control an 8x8 matrix of LEDs.

• StringAdditionOperator: add strings together in a variety of ways.
• StringAppendOperator: append data to strings.
• StringCaseChanges: change the case of a string.
• StringCharacters: get/set the value of a specific character in a string.
• StringComparisonOperators: compare strings alphabetically.

• StringIndexOf: look for the first/last instance of a character in a string.
• StringLength & StringLengthTrim?: get and trim the length of a string.
• StringReplace: replace individual characters in a string.
• StringStartsWithEndsWith: check which characters/substrings a given string starts or ends with.
• StringSubstring: look for "phrases" within a given string.
• ArduinoISP: use an Arduino as an AVR in-system programmer.

• ChatServer: set up a simple chat server.
• WebClient: make a HTTP request.
• WebServer: host a simple HTML page that displays analog sensor values.
• PachubeCient: connect to Pachube.com, a free datalogging site.
• TwitterClient: send a "tweet" with your Arduino.
• BarometricPressureWebServer: output the values from a barometric pressure sensor as a web page.

• Hello World: displays "hello world!" and the seconds since reset.
• Blink: control of the block-style cursor.
• Cursor: control of the underscore-style cursor.
• Display: quickly blank the display without losing what's on it.
• TextDirection: control which way text flows from the cursor.
• Scroll: scroll text left and right.
• Serial input: accepts serial input, displays it.
• SetCursor: set the cursor position.
• Autoscroll: shift text right and left.

• BarometricPressureSensor: read air pressure and temperature from a sensor using SPI.
• SPIDigitalPot: control a digital potentiometer using SPI.

• Blink?: turn an LED on and off.

• Blink: turn an LED on and off.

• Simple Keyboard: a three-key musical keyboard using force sensors and a piezo speaker.
• Tone4: play tones on multiple speakers sequentially using the tone() command.

• Serial input: how to take different actions based in characters received in the serial port.
• MIDI: how to send MIDI note messages serially.

• Array: a variation on the For Loop example that demonstrates how to use an array.

• Switch Case 2: a second switch-case example, showing how to take different actions based in characters received in the serial port.

• ADXL3xx: read an ADXL3xx accelerometer.

• LED Bar Graph: how to make an LED bar graph
• Row Column Scanning: how to control an 8x8 matrix of LEDs

• StringAdditionOperator: adding strings together in a variety of ways.
• StringAppendOperator: appending data to strings.
• StringCaseChanges: changing the case of a string.
• StringCharacters: getting/setting the value of a specific character in a string.
• StringComparisonOperators: comparing strings alphabetically.
• StringConstructors: how to initialize string objects.
• StringIndexOf: looking for the first/last instance of a character in a string.
• StringLength & StringLengthTrim?: getting and trimming the length of a string.
• StringReplace: replacing individual characters in a string.
• StringStartsWithEndsWith: checking what character/substring a given string starts or ends with.
• StringSubstring: looking for "phrases" within a given string.
• ArduinoISP: using an Arduino as an AVR in-system programmer.

• ChatServer: setting up a simple chat server.
• WebClient: making a HTTP request.
• WebServer: hosting a simple HTML page that displays analog sensor values.
• PachubeCient: connecting to Pachube.com, a free datalogging site.
• TwitterClient: sending a "tweet" with your Arduino.
• BarometricPressureWebServer: outputting the values from a barometric pressure sensor as a web page.

• StringStartsWithEndsWith: Checking what character/substring a given string starts or ends with.

• ArduinoISP: Using an Arduino as an AVR in-system programmer.

• ChatServer: Setting up a simple chat server.
• WebClient: Making a HTTP request.
• WebServer: Hosting a simple HTML page that displays analog sensor values.
• PachubeCient: Connecting to Pachube.com, a free datalogging site.
• TwitterClient: Sending a "tweet" with your Arduino.
• BarometricPressureWebServer: Outputting the values from a barometric pressure sensor as a web page.

• StringAdditionOperator: Adding strings together in a variety of ways.
• StringAppendOperator: Appending data to strings.
• StringCaseChanges: Changing the case of a string.
• StringCharacters: Getting/setting the value of a specific character in a string.
• StringComparisonOperators: Comparing strings alphabetically.
• StringConstructors: How to initialize string objects.
• StringIndexOf: Looking for the first/last instance of a character in a string.
• StringLength & StringLengthTrim: Getting and trimming the length of a string.
• StringReplace: Replacing individual characters in a string.

• StringSubstring: Looking for "phrases" within a given string.

• StringAdditionOperator: Adding strings together in a variety of ways
• StringAppendOperator: Appending data to strings
• StringCaseChanges: Changing the case of a string
• StringCharacters: Getting/setting the value of a specific character in a string
• StringComparisonOperators: Comparing strings alphabetically
• StringConstructors: How to initialize string objects
• StringIndexOf: Looking for the first/last instance of a character in a string
• StringLength?:
• StringLengthTrim:
• StringReplace: Replacing string characters

6.Sensors

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Core Functions

1.Basics

• AnalogReadSerial
• BareMinimum
• Blink? turn an LED on and off.
• DigitalReadSerial
• Fade

2.Digital

• Blink turn an LED on and off.

• Debounce: read a pushbutton, filtering noise.

3.Analog

• AnalogInOutSerial
• AnalogInSerial

• AnalogWriteMega

4.Communication

These examples include code that allows the Arduino to talk to Processing sketches running on the computer. For more information or to download Processing, see processing.org. There are also Max/MSP patches that can communicate with each Arduino sketch as well. For more on Max/MSP see Cycling 74

• ASCII Table: demonstrates Arduino's advanced serial output functions.
• Dimmer: move the mouse to change the brightness of an LED.
• Graph: sending data to the computer and graphing it in Processing.
• Physical Pixel: turning on and off an LED by sending data from Processing.
• Virtual Color Mixer: sending multiple variables from Arduino to the computer and reading them in Processing.
• Serial Call Response: sending multiple vairables using a call-and-response (handshaking) method.
• Serial Call Response ASCII: sending multiple vairables using a call-and-response (handshaking) method, and ASCII-encoding the values before sending.
• Serial input how to take different actions based in characters received in the serial port.
• MIDI How to send MIDI note messages serially.
• MultiSerialMega

5.Control Structures

7.Display

8.Strings

• StringAdditionOperator
• StringAppendOperator
• StringCaseChanges
• StringCharacters
• StringComparisonOperators
• StringConstructors
• StringIndexOf
• StringLength?
• StringLengthTrim
• StringReplace
• StringStartsWithEndsWith
• StringSubstring
• ArduinoISP

(:divend:)

(:div style="float:left; width:280px; padding:20px;":)

Libraries

EEPROM

Firmata

• AllInputsFirmata?
• AnalogFirmata?
• EchoString?
• I2CFirmata?
• OldStandardFirmata?
• ServoFirmata?
• SimpleAnalogFirmata?
• SimpleDigitalFirmata?
• StandardFirmata?

Matrix

• hello_matrix
• sprite_animation

SPI Library

• BarometricPressureSensor: Read air pressure and temperature from a sensor using SPI
• SPIDigitalPot: Control a digital potentiometer using SPI

SoftwareSerial

Need examples

Wire Library

• SFRRanger_reader
• digital_potentiometer
• master_reader
• master_writer
• slave_receiver
• slave_sender

(:div1end:)

Ethernet Library

• ChatServer
• WebClient
• WebServer
• PachubeCient
• TwitterClient
• BarometricPressureWebServer

• SPIDigitalPot: Control a digital potentiometer using SPI

SPI Library

• BarometricPressureSensor: Read air pressure and temperature from a sensor using SPI

Arduino as ISP Programmer

ISP programmer Turn your Arduino into an in-circuit programmer to re-program Atmega chips. Useful when you need to re-load the bootloader on an Arduino, or if you're making your own Arduino-compatible circuit on a breadboard.

• Tone4 Play tones on multiple speakers sequentially using the tone() command.

• Tone: play a melody with a Piezo speaker.
• Pitch follower: play a pitch on a piezo speaker depending on an analog input
• Simple Keyboard A three-key musical keyboard using force sensors and a piezo speaker.

Display

(:cell width=50%:)

• TextDirection - control which way text flows from the cursor

• Autoscroll - shift text right and left

LiquidCrystal Library

• Hello World - displays "hello world!" and the seconds since reset
• Blink - control of the block-style cursor
• Cursor - control of the underscore-style cursor
• Display - quickly blank the display without losing what's on it.
• IncrementDecrement? - control which way text flows from the cursor
• Scroll - scroll text left and right
• Serial input - accepts serial input, displays it
• SetCursor - set the cursor position
• Shift? - shift text right and left

• For Loop: controlling multiple LEDs with a for loop and.
• Array: A variation on the For Loop example that demonstrates how to use an array.
• While Loop: how to use a while loop to calibrate a sensor while a button is being read.

• MIDI How to send MIDI note messages serially.

• Switch Case 2 A second switch-case example, showing how to take different actions based in characters received in the serial port.

• Serial input how to take different actions based in characters received in the serial port.

• Switch Case: how to choose between a discrete number of values. Equivalent to multiple If statements. This example shows how to divide a sensor's range into a set of four bands and to take four different actions depending on which band the result is in.

• Switch Case: how to choose between a discrete number of values. Equivalent to multiple If statemtns.

Here's a style guide that helps with writing examples for beginners.

• LED Bar Graph How to make an LED bar graph
• Row Column Scanning How to control an 8x8 matrix of LEDs

Display

Examples of basic display control LED Bar Graph How to make an LED bar graph Row Column Scanning How to control an 8x8 matrix of LEDs

• If Statement (Conditional): how to use an if statement to change output conditions based on changing input conditions.

Control Structures

• For Loop and Array: controlling multiple LEDs with a for loop and an array.
• While Loop: how to use a while loop to calibrate a sensor while a button is being read.

• Button State Change counting the number of button pushes

• Virtual Color Mixer: sending multiple variables from Arduino to the computer and reading them in Processing.

These examples include code that allows the Arduino to talk to Processing sketches running on the computer. For more information or to download Processing, see processing.org. There are also Max/MSP patches that can communicate with each Arduino sketch as well. For more on Max/MSP see Cycling 74

• Serial Call Response: sending multiple vairables using a call-and-response (handshaking) method.

• Serial Call Response: sending multiple vairables using a call-and-response (handshaking) method.
• Serial Call Response ASCII: sending multiple vairables using a call-and-response (handshaking) method, and ASCII-encoding the values before sending.

• RCtime

For a huge list of examples from the Arduino community, see the interfacing with hardware page on the playground wiki. Also see the list of old examples.

More

For a huge list of examples from the Arduino community, see the interfacing with hardware page on the playground wiki.

• Melody: play melodies with a Piezo speaker.

• Calibration: for analog sensor readings

Sensors

• ADXL3xx: Read an ADXL3xx accelerometer.
• Knock: detect knocks with a piezo element.
• Memsic2125 : two-axis acceleromoter
• Ping: detecting objects with an ultrasonic range finder

• Play Tones from the Serial Connection

• Heartbeat

• Stopwatch

• Calibration: for analog sensor readings

• Memsic2125: two-axis acceleromoter

• Ping: detecting objects with an ultrasonic range finder

• Calibrating analog sensor readings

• Play Melodies with a Piezo Speaker

• Knob: control the shaft of a servo motor by turning a potentiometer.

• RS-232 computer interface

Basics

Simple programs that demonstrate basic Arduino commands. These are included with the Arduino environment; to open them, click the Open button on the toolbar and look in the examples folder.

Servo Library

• Sweep: sweeps the shaft of a servo motor back and forth.

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Libraries

Examples from the libraries that are included in the Arduino software.

• ADXL3xx: Read an ADXL3xx accelerometer.

• Capacitance Meter

Examples

See the foundations page for in-depth description of core concepts of the Arduino hardware and software; the hacking page for information on extending and modifying the Arduino hardware and software; and the links page for other documentation.

• Read an ADXL3xx accelerometer

Matrix Library

• Hello Matrix?: blinks a smiley face on the LED matrix.

Stepper Library

• Motor Knob: control a stepper motor with a potentiometer.

EEPROM Library

• EEPROM Clear: clear the bytes in the EEPROM.
• EEPROM Read: read the EEPROM and send its values to the computer.
• EEPROM Write: stores values from an analog input to the EEPROM.

• Blink Without Delay: blinking an LED without using the delay() function.

Arduino Examples

See the foundations page for in-depth description of core concepts of the Arduino hardware and software, and the links page for other documentation.

• BlinkWithoutDelay: blinking an LED without using the delay() function.

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These are more complex examples for using particular electronic components or accomplishing specific tasks. The code is included on the page.

Timing & Millis

• Stopwatch

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• TimeSinceStart:

Timing & Millis

• Blinking an LED without using the delay() function
• Stopwatch

• TwoSwitchesOnePin: Read two switches with one I/O pin

• * TwoSwitchesOnePin: Read two switches with one I/O pin

• TwoSwitchesOnePin: Read two switches with one I/O pin

See the foundations page for explanations of the concepts involved in the Arduino hardware and software.

• Foundations has moved here

• Foundations

Foundations

Tutorials

Here you will find a growing number of examples and tutorials for accomplishing specific tasks or interfacing to other hardware and software with Arduino. For instructions on getting the board and environment up and running, see the Arduino Getting Started.

• Optimization?: What to do when your program runs too slowly.

• Debugging?: Figuring out what's wrong with your hardware or software and how to fix it.

• Numbers?: The various types of numbers available and how to use them.

• Variables: How to define and use variables.

• Arrays?: How to store multiple values of the same type.

• Pointers?:

• Functions?: How to write and call functions.

• Serial Communication?: How to send serial data from an Arduino board to a computer or other device (including via the USB connection).

• Interrupts?: Code that interrupts other code under certain conditions.

(:if false:)

• Communication?: An overview of the various ways in which an Arduino board can communicate with other devices (serial, I2C, SPI, Midi, etc.)

• Serial Communication?: How to send serial data from an Arduino board to a computer or other device.

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• PWM (Pulse-Width Modulation): The method used by analogWrite() to simulate an analog output with digital pins.

• PWM (Pulse-Width Modulation): The method used by analogWrite() to simulate an analog output with digital pins.

• Bootloader: A small program pre-loaded on the Arduino board to allow uploading sketches.

• Memory: The various types of memory available on the Arduino board.

• Digital Pins: How the pins work and what it means for them to be configured as inputs or outputs.

• Analog Input Pins: Details about the analog-to-digital conversion and other uses of the pins.

More Tutorials

Board Setup and Configuration: Information about the components and usage of Arduino hardware.

Other Examples

These are more complex examples for using particular electronic components or accomplishing specific tasks. The code is included in the tutorial.

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Tutorials

Tutorials created by the Arduino community. Hosted on the publicly-editable playground wiki.

Interfacing With Hardware: Code, circuits, and instructions for using various electronic components with an Arduino board.

• Output
• Input
• Interaction
• Storage
• Communication

Interfacing with Software: how to get an Arduino board talking to software running on the computer (e.g. Processing, PD, Flash, Max/MSP).

Code Library and Tutorials: Arduino functions for performing specific tasks and other programming tutorials.

Electronics Techniques: tutorials on soldering and other electronics resources.

Manuals, Curricula, and Other Resources

Arduino Booklet (pdf): an illustrated guide to the philosophy and practice of Arduino.

Learn electronics using Arduino: an introduction to programming, input / output, communication, etc. using Arduino. By ladyada.

• Lesson 0: Pre-flight check...Is your Arduino and computer ready?
• Lesson 1: The "Hello World!" of electronics, a simple blinking light
• Lesson 2: Sketches, variables, procedures and hacking code
• Lesson 3: Breadboards, resistors and LEDs, schematics, and basic RGB color-mixing
• Lesson 4: The serial library and binary data - getting chatty with Arduino and crunching numbers
• Lesson 5: Buttons & switches, digital inputs, pull-up and pull-down resistors, if/if-else statements, debouncing and your first contract product design.

Example labs from ITP

Spooky Arduino: Longer presentation-format documents introducing Arduino from a Halloween hacking class taught by TodBot:

• class 1 (getting started)
• class 2 (input and sensors)
• class 3 (communication, servos, and pwm)
• class 4 (piezo sound & sensors, arduino+processing, stand-alone operation)

Bionic Arduino: another Arduino class from TodBot, this one focusing on physical sensing and making motion.

Examples from Tom Igoe

Examples from Jeff Gray

• Debounce: read a pushbutton, filtering noise.

• X10 output control devices over AC powerlines using X10

These examples include code that allows the Arduino to talk to Processing sketches running on the computer. For more information or to download Processing, see processing.org.

Simple programs that demonstrate the use of the Arduino board. These are included with the Arduino environment; to open them, click the Open button on the toolbar and look in the examples folder. (If you're looking for an older example, check the Arduino 0007 tutorials page.)

Simple programs that demonstrate the use of the Arduino board. These are included with the Arduino environment; to open them, click the Open button on the toolbar and look in the examples folder. (If you're looking for an older example, check the Arduino 0007 tutorials page.

Simple programs that demonstrate the use of the Arduino board. These are included with the Arduino environment; to open them, click the Open button on the toolbar and look in the examples folder.

Digital I/O

• Blink: turn an LED on and off.
• Button: use a pushbutton to control an LED.
• Loop: controlling multiple LEDs with a loop and an array.

Analog I/O

• Analog Input: use a potentiometer to control the blinking of an LED.
• Fading: uses an analog output (PWM pin) to fade an LED.
• Knock: detect knocks with a piezo element.
• Smoothing: smooth multiple readings of an analog input.

Communication

• ASCII Table: demonstrates Arduino's advanced serial output functions.
• Dimmer: move the mouse to change the brightness of an LED.
• Graph: sending data to the computer and graphing it in Processing.
• Physical Pixel: turning on and off an LED by sending data from Processing.
• Virtual Color Mixer: sending multiple variables from Arduino to the computer and reading them in Processing.

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Tutorials

These are more complex tutorials for using particular electronic components or accomplishing specific tasks. The code is included in the tutorial.

Miscellaneous

• Build your own DMX Master device

Other Arduino Tutorials

• Tutorials from the Arduino playground

• Spooky Arduino and more from Todbot

• PWM all of the digital pins in a sinewave pattern

• Use two Arduino pins as a capacitive sensor

• http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1171076259 |Use a couple of Arduino pins as a capacitive sensor]]

• http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1171076259 Use a couple of Arduino pins as a capacitive sensor

• More sound ideas

• Simple Dimming 3 LEDs with Pulse-Width Modulation (PWM)
• More complex dimming/color crossfader

• Multiple digital inputs with a CD4021 Shift Register

• Multiple digital ins with a CD4021 Shift Register

• Using a pushbutton as a switch

• Arduino + C

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• Arduino + MaxMSP

• Arduino + Ruby

• Controlling an LED circle with a joystick

• Multiple digital outs with a 595 Shift Register

• MIDI Output (from ITP physcomp labs) and from Spooky Arduino

Other Arduino Examples

• Example labs from ITP

• Examples from Tom Igoe

• Examples from Jeff Gray

• Example labs from ITP

• Examples from Tom Igoe.

• Examples from Jeff Gray.

Other Arduino Examples

Here you will find a growing number of examples and tutorials for accomplishing specific tasks or interfacing to other hardware and software with Arduino. For instructions on getting the board and environment up and running, see the Arduino guide.

Here you will find a growing number of examples and tutorials for accomplishing specific tasks or interfacing to other hardware and software with Arduino. For instructions on getting the board and environment up and running, see the Arduino guide?.

• Extend your digital outs with 74HC595 shift registers

todbot has some very detailed, illustrated tutorials from his Spooky Projects course: class 1 (getting started), class 2 (input and sensors), class 3 (communication, servos, and pwm), class 4 (piezo sound & sensors, arduino+processing, stand-alone operation)

Arduino Tutorials

Here you will find a growing number of examples and tutorials for accomplishing specific tasks or interfacing to other hardware and software with Arduino. For instructions on getting the board and environment up and running, see the Howto.

todbot has some very detailed, illustrated tutorials from his Spooky Projects course: class 1 (getting started), class 2 (input and sensors), class 3 (communication, servos, and pwm).

Course Guides

todbot has some very detailed, illustrated tutorials from his Spooky Projects course: class 1 (getting started), class 2 (input and sensors).

This guide to the Arduino IDE (integrated development environment) explains the functions of the various buttons and menus.

The libraries page explains how to use libraries in your sketches and how to make your own.

Here you will find a growing number of step by step guides on how to learn the basics of arduino and the things you can do with it. For instructions on getting the board and IDE up and running, see the Howto.

Learning to use Arduino

Here you will find a growing number of step by step guides on how to learn the basics of arduino and the things you can do with it. For instructions on getting the board and IDE up and running, see the Howto?.

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Examples

Digital Output

• Blinking LED
• Blinking an LED without using the delay() function
• Dimming 3 LEDs with Pulse-Width Modulation (PWM)
• Knight Rider example
• Shooting star

Digital Input

• Digital Input and Output (from ITP physcomp labs)
• Read a Pushbutton
• Read a Tilt Sensor
• Controlling an LED circle with a joystick

Analog Input

• Read a Potentiometer
• Interfacing a Joystick
• Read a Piezo Sensor
• 3 LED cross-fades with a potentiometer
• 3 LED color mixer with 3 potentiometers

Complex Sensors

• Read an Accelerometer
• Read an Ultrasonic Range Finder (ultrasound sensor)
• Reading the qprox qt401 linear touch sensor

Sound

• Play Melodies with a Piezo Speaker
• Play Tones from the Serial Connection
• MIDI Output (from ITP physcomp labs)

Interfacing w/ Hardware

• Multiply the Amount of Outputs with an LED Driver
• Interfacing an LCD display with 8 bits
  • LCD interface library
• Driving a DC Motor with an L293 (from ITP physcomp labs).
• Driving a Unipolar Stepper Motor
• Build your own DMX Master device
• Implement a software serial connection
  • RS-232 computer interface
• Interface with a serial EEPROM using SPI
• Control a digital potentiometer using SPI

Example labs from ITP

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The Arduino board

This guide to the Arduino board explains the functions of the various parts of the board.

The Arduino environment

This guide to the Arduino IDE? (integrated development environment) explains the functions of the various buttons and menus.

The libraries? page explains how to use libraries in your sketches and how to make your own.

Video Lectures by Tom Igoe

Watch Tom introduce Arduino. Thanks to Pollie Barden for the great videos.

Interfacing with Other Software

• Introduction to Serial Communication (from ITP physcomp labs)
• Arduino + Flash
• Arduino + Processing
• Arduino + PD
• Arduino + VVVV
• Arduino + Director

Tech Notes (from the forums or playground)

• Software serial (serial on pins besides 0 and 1)
• L297 motor driver
• Hex inverter
• Analog multiplexer
• Power supplies
• The components on the Arduino board
• Arduino build process
• AVRISP mkII on the Mac
• Non-volatile memory (EEPROM)
• Bluetooth
• Zigbee
• LED as light sensor (en Francais)
• Arduino and the Asuro robot
• Using Arduino from the command line

Other Arduino Sites

Also, see the examples from Tom Igoe and those from Jeff Gray.

Do you need extra help?

Is there a sensor you would like to see characterized for Arduino, or is there something you would like to see published in this site? Refer to the forum for further help.

External Resources

Instant Soup is an introduction to electronics through a series of beautifully-documented fun projects.

Make magazine has some great links in its electronics archive.

hack a day has links to interesting hacks and how-to articles on various topics. (:tableend:)