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Arduino is an open-source physical computing platform based on a simple i/o board and a development environment that implements the Processing/Wiring language. Arduino can be used to develop stand-alone interactive objects or can be connected to software on your computer (e.g. Flash, Processing, MaxMSP). The boards can be assembled by hand or purchased preassembled; the open-source IDE can be downloaded for free. For more information, see the website at: http://www.arduino.cc/ or the forums at: http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl To report a bug or a make a suggestions, go to: [hardware] http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?board=hwbugs [software] http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?board=swbugs INSTALLATION Detailed instructions are in reference/Guide_Windows.html and reference/Guide_MacOSX.html. For Linux, see the Arduino playground: http://www.arduino.cc/playground/Learning/Linux If you are using a USB Arduino, you will need to install the drivers for the FTDI chip on the board. These can be found in the drivers/ directory. * On Windows, plug in the Arduino board and point the Windows Add Hardware wizard to the drivers/FTDI USB Drivers sub-directory of the Arduino application directory. * On the Mac, mount the FTDIUSBSerialDriver_v2_1_9.dmg (on PPC Macs) or the FTDIUSBSerialDriver_v2_2_9_Intel.dmg (on Intel Macs) disk image and run the included FTDIUSBSerialDriver.pkg. You will need to restart your computer. * On Linux, drivers are included in kernel versions 2.4.20 or greater. CREDITS Arduino is an open source project, supported by many. The Arduino team is composed of Massimo Banzi, David Cuartielles, Tom Igoe, Gianluca Martino, and David A. Mellis. Nicholas Zambetti has contributed from the beginning. Yaniv Steiner and Giorgio Olivero have been supporting the project and are working at using it with the Instant Soup platform. Arduino uses the GNU avr-gcc toolchain, avrdude, avr-libc, and code from Processing and Wiring. UPDATES 0015 - 2009.03.26 [core / libraries] * Adding support for the Arduino Mega (ATmega1280). [environment] * Reinstating use of core.a library in the build process, slightly shrinking compiled sketch sizes. (Thanks to William Westfield.) * Fixing bug in copy for forum (thanks to eried). 0014 - 2009.03.07 [core / libraries] * Fixing bug that prevented multiple outgoing Client connections with the ethernet library. [environment] * Clarifying ATmega168 vs. ATmega328 in the Tools > Boards menu. [tools] * Updating the Mac OS X AVR tools to AVR MacPack 20081213. This includes avr-gcc 4.3.2, which should fix problems with functions called from within interrupts. 0013 - 2009.02.06 [documentation / examples] * Adding examples for Parallax Ping Sensor and Memsic 2125 accelerometer. [core / libraries] * Adding support for the ATmega328. The upload speed is 57600 baud, so you may need to edit boards.txt or reburn your bootloader if you bought an ATmega328 w/ bootloader from adafruit or other supplier. * Adding support for printing floats to Print class (meaning that it works in the Serial, Ethernet, and LiquidCrystal classes too). Includes two decimal places. * Added word, word(), bitRead(), bitWrite(), bitSet(), bitClear(), bit(), lowByte(), and highByte(); see reference for details. * Working around problem that caused PWM output on pins 5 and 6 to never go to 0 (causing, for example, an LED to continue to glow faintly). * Removing cast macros, since function-style casts are a feature of C++. This should fix contributed libraries that broke in Arduino 0012. * Modifying pulseIn() to wait for a transition to start timing (i.e. ignoring any pulse that had already started when the function was called). * Fixing bug in random() that limited the ranges of values generated. Thanks to Mikal Hart. * Modifying delay() to pause for at least the given number of milliseconds. * Fixing bug in Ethernet library that interfered with use of pins 8 and 9. * Originating each outgoing network connection from a different port (in the Client class of the Ethernet library). Thanks to Paul and joquer. * Updating ATmega168 bootloader to work with standard distributions of avrdude (responding to signature requests made with the universal SPI command) and correctly store EEPROM data. Thanks to ladyada. [environment] * Omitting unused functions from compiled sketches, reducing their size. * Changing compilation process to allow for use of EEMEM directive (although not yet uploading EEPROM data). 0012 - 2008.09.18 * Added Arduino Nano to the boards menu. * Arduino Pro or Pro Mini (8 MHz) to the boards menu. * Added Firmata library by Hans Steiner and others. This provides a standard protocol for communicating with software on the computer. * Added an Ethernet library for use with the Arduino Ethernet Shield. * Added a Servo library based on the work of Jim Studt. * Added a LiquidCrystal library based on the work in the playground. It supports both 4- and 8-bit modes. * Improved millis(): it now overflows after 49 days instead of 9 hours, but now uses slightly more processing power. * Fixed reversing direction bug in Stepper library. (Thanks to Wayne Holder.) * Moved insertion of #include <WProgram.h> to after any comments and #include statements in the main sketch file. This means that an #include <stdlib.h> now works. * Upgraded to newer versions of avr-gcc (4.3.0) and avr-libc (1.6). This provides support for newer Atmel chips, but may increase the size of sketches. * Allowing per-board specification of the upload.using preference, allowing upload via bootloader to some boards and via a programmer to others. * Added return values to some functions in the Wire library to allow for better error handling. * Fixed random() to work with long values. * Creation of an abstract Print base-class to allow Serial, SoftwareSerial, and LiquidCrystal to share code for print() and println(). * Incorporated ladyada's watchdog timer mods to the bootloader source, but only compiling them in for the Pro and Pro Mini (because they are included in the bootloader being burned on the boards by SparkFun). 0011 - 2008.03.28 * Fixed Find in Reference. * Added map() function for mapping values from one range to another. * Added analogReference() function. * Added interrupts() and noInterrupts() functions. * Added degrees() and radians() functions. * Added timeout parameter (in microseconds) to pulseIn(); default is 1 second. * Support for uploading sketch using a programmer. * Improved detection of functions that need prototyping. * Placing function prototypes after #include's and #define's. * No longer moving #include statements to the top of the sketch. * Can now drag .pde files onto the Arduino dock icon on Mac OS X. Thanks to Peter Sgouros. * New script for downloading the reference from Tom Pollard. Thanks Tom! * Miscellaneous Mac OS X and other patches from Wim Lewis. Thanks Wim! * Updated Mac OS X FTDI drivers. 0010 - 2007.10.11 * Support for the LilyPad Arduino. * Vista support. * Mac OS X universal distribution. * Printing! * Copy for discourse. * New Board menu replaces the Microcontroller menu. * New Burn Bootloader menu offers a choice of programmers. * New and improved keyboard shortcuts. * Fixed some find/replace bugs. * Better auto-format. * Improved error messages when uploading. * Support for COM10 and higher on Windows. * Fixed automatic refresh of the Serial Port menu under Windows. * Quaqua look-and-feel on Mac OS X. * Reorganization of the Arduino application directory. 0009 - 2007.08.06 * Added support for the Arduino Diecimila. * Switched to using avrdude (instead of uisp) for uploading sketches. * Added the ability to burn NG and Diecimila bootlaoders (with an AVRISPmkII). * Fixed a bug in SoftwareSerial (a hardware serial function was being called instead of the software serial equivalent). Thanks to brianbr for the report and fix. 0008 - 2007.06.09 * Updated examples (in distribution and on the website). * Added an EEPROM library (see reference for details). * Added a Stepper motor library (see reference). * Patched to reduce binary sketch sizes by building the Arduino core as a library (.a) file - now only the needed parts of the core are linked into a sketch. Originally written by Nicolas Roland, revised by Don Cross. * Fixed bug in Serial.available(). Report and fix by Don Cross. * Now recompiling libraries when switching microcontrollers. Report by Julian Bleecker; fix by Nicholas Zambetti. * Cleaned up core functions: moved pin definitions into program space to save RAM, and other minor improvements. Contributed by Jim Studt. * Lots of reference additions and fixes from Paul Badger. * Changed default microcontroller to ATmega168 from ATmega8. * Removed the delay from analogRead(). * Activating TWI/I2C pullup resistors on the ATmega168 (in addition to the ATmega8). 0007 - 2006.12.25 * Smaller core (about 3.5 KB instead of 4.5 KB). * Added a SoftwareSerial library (thanks to Antonio, Heather Dewey-Hagborg, and bigengineer for their help). * Implemented a Serial.flush() routine; see reference for details. * Digital pins 0 and 1 can be used for i/o until a call to Serial.begin(). * Replaced avr-lib's uart routines with custom code for handling serial communication and modified C++ serial commands to call the C serial commands; the code may behave slightly differently in border cases (e.g. non-standard speeds, or on overflow). * Added attachInterrupt() and detachInterrupt() functions for handling of external interrupts on pins 2 and 3. * Implemented shiftOut() routine; see reference for details. * Defining binary constants: e.g. B1010 is 6. * Mac versions no longer require running of the macosx_setup.command script. * Windows version comes with the FTDI USB drivers already unzipped. * New Linux binary distribution (still requires some programs to be pre-installed). 0006 - 2006.10.21 * Mac version no longer requires Java 1.5, meaning it should run on 10.3.9. * Added support for analog inputs 6 and 7 and pwm on pins 5 and 6 on the on the ATmega168 used in the Arduino Mini (extra analog inputs not available in DIP ATmega168s). * You now select the baud rate for the serial monitor from within the editor status bar when the serial monitor is running instead of from the Tools menu. * Pressing enter within the serial monitor edit box no longer appends a newline to the message sent to the board. * Included the Wire (TWI) library from Wiring. * Updated the reference. 0005 - 2006.09.26 * Applied patch from Hans Steiner to improve Linux support by searching for avr tools in the user's path instead of expecting them at a fixed location. * Added an upload.verbose preference for help in debugging. * ATmega168 support! * New Wiring-compatible randomSeed(), random(max) and random(min, max) functions (except operating on longs instead of floats). * Fixed bug that sometimes caused uploading of old versions of a sketch. * Serial monitor nows include an interface to send messages to the Arduino board. Pressing return appends a newline, pushing the send button doesn't. * Now displaying "burning bootloader..." and "compiling..." status messages. 0004 - 2006.04.26 * Main sketch is now compiled as C++ (instead of C). * Updated avr toolchain. * printInteger(), printHex(), etc. now handle longs. * millis() fixed (now overflows after days, not minutes) * Fixed path to java in Windows run.bat. * Added Matrix and Sprite libraries (written with Nicholas Zambetti). * PWM now working on pin 11 (in addition to pins 9 and 10). * Slowed PWM frequency (on all three PWM pins) to 1KHz. * Now give an error if compiled sketch is too big. * Fixed abs(), min(), max(), and constrain() macros. * Added menu items to the IDE to burn bootloader. * Now display binary sketch size on upload, and give error if too big. * Added C++ serial library. * Resynced with Processing/Wiring IDE code (improved auto-format, faster logging to serial monitor console, other bug fixes) * New library system. * Updated to latest version of the RXTX serial library; Mac users will need to rerun macosx_setup.command. 0003 - 2006.01.16 API Changes * Reversed the analog input pins to correspond to newer boards. This means a call, for example, to analogRead(0) must be changed to analogRead(5) in order to read the same physical pin. * Added a printNewline() function (which sends '\n' = ASCII 10). New Stuff * Reference is included (features native to C not yet documented). * Serial monitor added (click the toolbar button to turn it on or off). Baud rate is controlled by the Serial Monitor Baud Rate Menu, defaults to 9600. Icon and implementation from Wiring. * Serial port menu now automatically refreshes when opened. * New blue color scheme and icons courtesy of Noah Shibley (colors are hardcoded into the source to ensure consistency with image files). * Keyspan and FTDI USB drivers included with Mac and Windows distributions. Bug Fixes * millis() now updates every millisecond instead of every second. * Bootloader included with Windows distribution (it was already in the Mac dist). * Updated icon of the Windows executable. * Now flushing the serial port before uploading (should fix some errors). * Improved accuracy of the delayMicroseconds() function. Other * Upload rate no longer selectable from a menu within the IDE. Instead, edit the serial.download_rate item in the preferences.txt file. * Created Xcode project for building Arduino on the Mac (doesn't yet regenerate the grammar files or package the distribution); active target should be "App". * Removed unused or unimplemented items from menus. 0002 - 2005.10.05 * New build process no longer uses makefiles; now controlled by preferences.txt. * core/ replaced with targets/; can now link against Wiring libraries. * Replaced print() with printString, printInteger, printHex, printByte, etc. * Added menu for selecting serial port speed. * Updated icon. * Bootloader shrunk to less than 1 KB; fuses updated accordingly. * Added serialRead(), serialAvailable(), and delayMicroseconds(). 0001 - 2005.08.25 * This is the first released of the unified IDE + language library it's a terrible hack... but it works. at the moment it's in alpha stage but it can be used to work. * The processing preprocessor is included but not used.