# Development **URL:** https://forum.arduino.cc/c/forum-2005-2010-read-only/software/development/110.md [Latest](https://forum.arduino.cc/latest.md) · [Categories](https://forum.arduino.cc/categories.md) --- ## [About the Development category](https://forum.arduino.cc/t/about-the-development-category/847550)
**Author:** [@system](https://forum.arduino.cc/u/system)\ **Replies:** 0\ **Last updated:** [April 12, 2021, 12:19pm UTC](https://forum.arduino.cc/t/about-the-development-category/847550 "2021-04-12T12:19:31Z")
Creating libraries, understanding Arduino innards, and open source development --- ## [send byte array via com](https://forum.arduino.cc/t/send-byte-array-via-com/38262)
**Author:** [@system](https://forum.arduino.cc/u/system)\ **Replies:** 0\ **Last updated:** [January 24, 2011, 8:12am UTC](https://forum.arduino.cc/t/send-byte-array-via-com/38262 "2011-01-24T08:12:47Z")
Hi, I want to send via com from PC(C# application) array of byte (100 elements in array), what is the best method for do this ? I tray do it in loop, but something is wrong becuse when i read message from arduni i take… --- ## [Is there a way to save data inputed into Arduino?](https://forum.arduino.cc/t/is-there-a-way-to-save-data-inputed-into-arduino/38261)
**Author:** [@system](https://forum.arduino.cc/u/system)\ **Replies:** 5\ **Last updated:** [January 24, 2011, 7:58am UTC](https://forum.arduino.cc/t/is-there-a-way-to-save-data-inputed-into-arduino/38261 "2011-01-24T07:58:04Z")
I have a barometer hooked up and running. The issue I am having is that every time you turn it on or hit reset you need to recalibrate it. Is there any way to save data onto the board so that after reset or turn on it ru… --- ## [Software challenge](https://forum.arduino.cc/t/software-challenge/38260)
**Author:** [@retrolefty](https://forum.arduino.cc/u/retrolefty)\ **Replies:** 12\ **Last updated:** [January 24, 2011, 6:57am UTC](https://forum.arduino.cc/t/software-challenge/38260 "2011-01-24T06:57:00Z")
Is there any way a running sketch could determine or calculate what clock rate it was running at? I don't have a application in mind at the moment, I'm just curious if such a function could be developed? Some clever hac… --- ## [Canopy/cover on side of house?](https://forum.arduino.cc/t/canopy-cover-on-side-of-house/38259)
**Author:** [@system](https://forum.arduino.cc/u/system)\ **Replies:** 1\ **Last updated:** [January 24, 2011, 5:42am UTC](https://forum.arduino.cc/t/canopy-cover-on-side-of-house/38259 "2011-01-24T05:42:42Z")
Canopy/cover on side of house? Im not quite sure what Im looking for here. Im wanting somewhere to store my motorcycle at home. We don't have a garage, and really don't have the money to get one built up at the moment a… --- ## [Neural Network Arduino](https://forum.arduino.cc/t/neural-network-arduino/38258)
**Author:** [@system](https://forum.arduino.cc/u/system)\ **Replies:** 3\ **Last updated:** [January 24, 2011, 5:27am UTC](https://forum.arduino.cc/t/neural-network-arduino/38258 "2011-01-24T05:27:35Z")
hola! developing a perceptron in Arduino, Arduino is: #include \ int p1; int p2; int n; void setup() { pinMode(13, OUTPUT); pinMode(7, INPUT); pinMode(8, INPUT); } void loop(){ p1=digitalRead(7); p2=d… --- ## [Newbie questions](https://forum.arduino.cc/t/newbie-questions/38257)
**Author:** [@CharlesLinquist](https://forum.arduino.cc/u/CharlesLinquist)\ **Replies:** 14\ **Last updated:** [January 24, 2011, 1:40am UTC](https://forum.arduino.cc/t/newbie-questions/38257 "2011-01-24T01:40:56Z")
I'm a long-time PIC user and I write in both ASM and PICBasic Pro. I'm used to dealing very close to the hardware, and the abstraction makes me feel uneasy. I need to read the ATMEL datasheets, but before I do, I would l… --- ## [Auto serial baudrate detector/selector](https://forum.arduino.cc/t/auto-serial-baudrate-detector-selector/38256)
**Author:** [@retrolefty](https://forum.arduino.cc/u/retrolefty)\ **Replies:** 4\ **Last updated:** [January 24, 2011, 1:05am UTC](https://forum.arduino.cc/t/auto-serial-baudrate-detector-selector/38256 "2011-01-24T01:05:21Z")
In another posting the thought came up that having a automatic baud rate detector function could be a useful thing to have in ones bag of tools. I'm still learning C, so I know this is not a bullet proof function, but ra… --- ## [Help- using an arduino to make a midi controller](https://forum.arduino.cc/t/help-using-an-arduino-to-make-a-midi-controller/38255)
**Author:** [@system](https://forum.arduino.cc/u/system)\ **Replies:** 147\ **Last updated:** [January 23, 2011, 11:18pm UTC](https://forum.arduino.cc/t/help-using-an-arduino-to-make-a-midi-controller/38255 "2011-01-23T23:18:22Z")
Hey everyone, I'm new to the forum I'm Chris I'm having trouble getting my head around many things, this is my first ever time using an Arduino, And i would greatly appreciate your help So here goes: The project is t… --- ## [Time Library added to Playground](https://forum.arduino.cc/t/time-library-added-to-playground/38254)
**Author:** [@mem](https://forum.arduino.cc/u/mem)\ **Replies:** 147\ **Last updated:** [January 23, 2011, 10:01pm UTC](https://forum.arduino.cc/t/time-library-added-to-playground/38254 "2011-01-23T22:01:20Z")
A library called Time that provides timekeeping functionality for Arduino has been added to the playground. This library is derived from the playground DateTime code but has a different API that is intended to be more f… --- ## [Reset to bootloader through sketch](https://forum.arduino.cc/t/reset-to-bootloader-through-sketch/38253)
**Author:** [@system](https://forum.arduino.cc/u/system)\ **Replies:** 9\ **Last updated:** [January 23, 2011, 9:45pm UTC](https://forum.arduino.cc/t/reset-to-bootloader-through-sketch/38253 "2011-01-23T21:45:35Z")
Hello, I currently am working on a small project and I need to reset the whole arduino into bootloader programming mode. I have a pro mini, atmega328 The way I currently tried is: asm volatile (" jmp 30720"); This doe… --- ## [brightness control for Noritake LCD-compatible VFD](https://forum.arduino.cc/t/brightness-control-for-noritake-lcd-compatible-vfd/38252)
**Author:** [@quarterturn](https://forum.arduino.cc/u/quarterturn)\ **Replies:** 1\ **Last updated:** [January 23, 2011, 7:54pm UTC](https://forum.arduino.cc/t/brightness-control-for-noritake-lcd-compatible-vfd/38252 "2011-01-23T19:54:18Z")
Here's a suggestion for an addition to the LiquidCrystal library: LiquidCrystal.cpp diff: 255,270d254 \< // set dimming on Noritake LCD-compatible VFD \< // dimming levels: \< // 0 = 100% \< // 1 = 75% \< // 2 = 50% \< // 3 … --- ## [Software PWM using daisy chained 74HC595s / SPI](https://forum.arduino.cc/t/software-pwm-using-daisy-chained-74hc595s-spi/38251)
**Author:** [@system](https://forum.arduino.cc/u/system)\ **Replies:** 24\ **Last updated:** [January 23, 2011, 10:17am UTC](https://forum.arduino.cc/t/software-pwm-using-daisy-chained-74hc595s-spi/38251 "2011-01-23T10:17:00Z")
It took quite some doing to get easy to use PWM control working with the 595 shift registers. I figured I'd pass along a slimmed down version of the application that just implements the PWM control via a timer1 process. … --- ## [Arduino frequency counter](https://forum.arduino.cc/t/arduino-frequency-counter/38250)
**Author:** [@system](https://forum.arduino.cc/u/system)\ **Replies:** 6\ **Last updated:** [January 23, 2011, 4:04am UTC](https://forum.arduino.cc/t/arduino-frequency-counter/38250 "2011-01-23T04:04:06Z")
Hi i found library for frequency counter: http://interface.khm.de/index.php/lab/experiments/frequency-measurement-library/ But it use 3 pin in. I need someone who help me rewrite this library to use with this comparato… --- ## [Modified 8bit FFT in c](https://forum.arduino.cc/t/modified-8bit-fft-in-c/38249)
**Author:** [@system](https://forum.arduino.cc/u/system)\ **Replies:** 16\ **Last updated:** [January 23, 2011, 2:36am UTC](https://forum.arduino.cc/t/modified-8bit-fft-in-c/38249 "2011-01-23T02:36:28Z")
I was looking for a simple arduino fft library to create an equalizer. I found lots of assembler code or 16 or 32 bit versions but nothing that was simple and out of the box usable. I have modified the fix\_fft.c to use… --- ## [New library: RGB GLCD (LDS183 Controller)](https://forum.arduino.cc/t/new-library-rgb-glcd-lds183-controller/38248)
**Author:** [@system](https://forum.arduino.cc/u/system)\ **Replies:** 26\ **Last updated:** [January 23, 2011, 1:24am UTC](https://forum.arduino.cc/t/new-library-rgb-glcd-lds183-controller/38248 "2011-01-23T01:24:03Z")
Hello. I have made a library for RGB GLCD's based on the LDS183 controller. This is the display that is used on the RGB LCD Shield by NKC Electronics. You can download the library from my website: Electronics - Hennin… --- ## [add new function to wiring\_digital.c](https://forum.arduino.cc/t/add-new-function-to-wiring_digital-c/38247)
**Author:** [@system](https://forum.arduino.cc/u/system)\ **Replies:** 10\ **Last updated:** [January 22, 2011, 8:22pm UTC](https://forum.arduino.cc/t/add-new-function-to-wiring_digital-c/38247 "2011-01-22T20:22:36Z")
Hello! I am trying to add new function "MydigitalWrite" to wiring\_digital.c () (\\arduino-0017\\hardware\\cores\\arduino) When I try to compile: In function 'void loop()': error: 'MydigitalWrite' was not declared in this… --- ## [Sdfat](https://forum.arduino.cc/t/sdfat/38246)
**Author:** [@system](https://forum.arduino.cc/u/system)\ **Replies:** 2\ **Last updated:** [January 22, 2011, 3:36am UTC](https://forum.arduino.cc/t/sdfat/38246 "2011-01-22T03:36:54Z")
Hello, Does anyone know how to retrieve the file creation and modification date with Sdfat? I know it this information is returned with root.ls(..) command, but that returns all the files in the directory. I just want t… --- ## [Where are files like \ kept?](https://forum.arduino.cc/t/where-are-files-like-wire-h-kept/38245)
**Author:** [@system](https://forum.arduino.cc/u/system)\ **Replies:** 2\ **Last updated:** [January 22, 2011, 1:34am UTC](https://forum.arduino.cc/t/where-are-files-like-wire-h-kept/38245 "2011-01-22T01:34:16Z")
I'm just getting started with the Arduino environment. I have download and installed 0022 on a MacBook Air running Snow Leopard with no problems. The curious thing is that a demo program has an include of Wire.h and com… --- ## [Morse Library (non-blocking sending), Cyclocomp'r](https://forum.arduino.cc/t/morse-library-non-blocking-sending-cyclocompr/38244)
**Author:** [@system](https://forum.arduino.cc/u/system)\ **Replies:** 0\ **Last updated:** [January 21, 2011, 8:55pm UTC](https://forum.arduino.cc/t/morse-library-non-blocking-sending-cyclocompr/38244 "2011-01-21T20:55:24Z")
I wrote a Morse library, the key feature of which (to differentiate it from the many others) is that it doesn't block while sending; for example, you can check on a sensor value while a long message is being played on a … --- ## [New Library: LSM303DLH 3D Compass Accelerometer](https://forum.arduino.cc/t/new-library-lsm303dlh-3d-compass-accelerometer/38243)
**Author:** [@system](https://forum.arduino.cc/u/system)\ **Replies:** 1\ **Last updated:** [January 21, 2011, 6:38pm UTC](https://forum.arduino.cc/t/new-library-lsm303dlh-3d-compass-accelerometer/38243 "2011-01-21T18:38:33Z")
Hello. I've made a new library for interfacing the Arduino with the Pololu LSM303DLH 3D compass and accelerometer carrier. It makes it simple to read the raw accelerometer and magnetometer data, and it has a function fo… --- ## [AVRProjectIDE - Editor for AVR/Arduino Projects](https://forum.arduino.cc/t/avrprojectide-editor-for-avr-arduino-projects/38242)
**Author:** [@system](https://forum.arduino.cc/u/system)\ **Replies:** 67\ **Last updated:** [January 21, 2011, 5:26pm UTC](https://forum.arduino.cc/t/avrprojectide-editor-for-avr-arduino-projects/38242 "2011-01-21T17:26:03Z")
I've written a development environment for AVR microcontrollers that is geared towards AVRStudio and Arduino users. I have just posted the first alpha and I'm looking for the first batch of users to use it, test it out a… --- ## [Frequency in, modify, Frequency back out](https://forum.arduino.cc/t/frequency-in-modify-frequency-back-out/38241)
**Author:** [@system](https://forum.arduino.cc/u/system)\ **Replies:** 2\ **Last updated:** [January 21, 2011, 5:15pm UTC](https://forum.arduino.cc/t/frequency-in-modify-frequency-back-out/38241 "2011-01-21T17:15:05Z")
I'm still a newb, so let me start with what I'd like to do, and then I'll move onto my guess as to how I need to do it (it's a real rough guess..) What I want to do is read in a frequency, divide that frequency by 1000,… --- ## [convert pde to cpp](https://forum.arduino.cc/t/convert-pde-to-cpp/38240)
**Author:** [@system](https://forum.arduino.cc/u/system)\ **Replies:** 3\ **Last updated:** [January 21, 2011, 5:08pm UTC](https://forum.arduino.cc/t/convert-pde-to-cpp/38240 "2011-01-21T17:08:18Z")
Hi everyone, I want to convert the pde file to cpp and then under visual studio made some things, and then using avr-gcc and avrdude upload this software to arduino. thanks for answers best regards malin --- ## [Creating a static object](https://forum.arduino.cc/t/creating-a-static-object/38239)
**Author:** [@system](https://forum.arduino.cc/u/system)\ **Replies:** 5\ **Last updated:** [January 21, 2011, 4:25pm UTC](https://forum.arduino.cc/t/creating-a-static-object/38239 "2011-01-21T16:25:53Z")
I'm having trouble creating a static object. Take a look at this snippet from a header file... #include \ #include "WProgram.h" #include "Logger.h" // this file #include \ class Log… --- ## [Lego powerfunctions IR](https://forum.arduino.cc/t/lego-powerfunctions-ir/38238)
**Author:** [@system](https://forum.arduino.cc/u/system)\ **Replies:** 5\ **Last updated:** [January 21, 2011, 1:25pm UTC](https://forum.arduino.cc/t/lego-powerfunctions-ir/38238 "2011-01-21T13:25:46Z")
Ive had a idea to use a irduino as a IR transmitter to control the lego powerfunction receiver. But I am a total nooby in this, ive done some research and found the protocol document for the lego transmitter: And here… --- ## [Library Problem](https://forum.arduino.cc/t/library-problem/38237)
**Author:** [@system](https://forum.arduino.cc/u/system)\ **Replies:** 6\ **Last updated:** [January 21, 2011, 6:35am UTC](https://forum.arduino.cc/t/library-problem/38237 "2011-01-21T06:35:19Z")
I am building a small Fuzzy logic control library and I am not used to c++. I did exactly like the library tutorial said but I am sure that I didn't something wrong that I can't notice. The main class is called FuzzySet… --- ## [Publishing multiple SMALL open-source projects?](https://forum.arduino.cc/t/publishing-multiple-small-open-source-projects/38236)
**Author:** [@westfw](https://forum.arduino.cc/u/westfw)\ **Replies:** 6\ **Last updated:** [January 21, 2011, 1:45am UTC](https://forum.arduino.cc/t/publishing-multiple-small-open-source-projects/38236 "2011-01-21T01:45:31Z")
How are people publishing multiple small open-source projects (ie Arduino Sketches of modest size) ? I'm getting a collection of sketches and other small pieces of code to share. It would be nice to put these at one of … --- ## [avrdude in an infinite loop with ATMEGA2560](https://forum.arduino.cc/t/avrdude-in-an-infinite-loop-with-atmega2560/38235)
**Author:** [@newhobby](https://forum.arduino.cc/u/newhobby)\ **Replies:** 0\ **Last updated:** [January 20, 2011, 11:35pm UTC](https://forum.arduino.cc/t/avrdude-in-an-infinite-loop-with-atmega2560/38235 "2011-01-20T23:35:52Z")
Hi, If I pick ATMEGA2560 board in Tools-\>boards and I have for example Duemilanove attached, avrdude keeps cycling and never times out. I understand ATMEGA2560 uses stk500v2 protocol and Duemilanove uses stk500v1, but … --- ## [Arduino Uno - sending UDP message](https://forum.arduino.cc/t/arduino-uno-sending-udp-message/38234)
**Author:** [@Suhanko](https://forum.arduino.cc/u/Suhanko)\ **Replies:** 2\ **Last updated:** [January 20, 2011, 7:13pm UTC](https://forum.arduino.cc/t/arduino-uno-sending-udp-message/38234 "2011-01-20T19:13:35Z")
Hello! Everyone knows how can I to send UDP messages from arduino? I could to send HTTP messages only. You knows some nice UDP librarie? Thanks ! [Next page](https://forum.arduino.cc/c/forum-2005-2010-read-only/software/development/110.md?page=1)