# Software **URL:** https://forum.arduino.cc/c/forum-2005-2010-read-only/software/55.md?page=2 [Latest](https://forum.arduino.cc/latest.md) · [Categories](https://forum.arduino.cc/categories.md) **Page:** 3 --- ## [Uploading file to SD card from web page.](https://forum.arduino.cc/t/uploading-file-to-sd-card-from-web-page/40593)
**Author:** [@system](https://forum.arduino.cc/u/system)\ **Replies:** 5\ **Last updated:** [January 23, 2011, 2:15pm UTC](https://forum.arduino.cc/t/uploading-file-to-sd-card-from-web-page/40593 "2011-01-23T14:15:47Z")
Hi, I have and Arduino Mega 2560 and an Arduino Ethernet Shield with a 4GB SDHC card installed. To experiment with this I have been playing with the ethernet library to produce both a web client and server and I thought… --- ## [Can't upload to Arduino Mega 2560](https://forum.arduino.cc/t/cant-upload-to-arduino-mega-2560/49805)
**Author:** [@system](https://forum.arduino.cc/u/system)\ **Replies:** 10\ **Last updated:** [January 23, 2011, 1:07pm UTC](https://forum.arduino.cc/t/cant-upload-to-arduino-mega-2560/49805 "2011-01-23T13:07:12Z")
Hi all guys! I've just started a little project with my brand new Arduino Mega 2560 and things seemed to work till today when i came back from work. I connected the board via USB to the pc, tried uploading a modified ve… --- ## [Arduino version 0021 download failure](https://forum.arduino.cc/t/arduino-version-0021-download-failure/49804)
**Author:** [@system](https://forum.arduino.cc/u/system)\ **Replies:** 1\ **Last updated:** [January 23, 2011, 1:01pm UTC](https://forum.arduino.cc/t/arduino-version-0021-download-failure/49804 "2011-01-23T13:01:43Z")
Having trouble downloading Arduino version 0021 What programs will open the software as it says it's unsupported? Where can I download? Regards, Pete. --- ## [polling the serial com port using arduino](https://forum.arduino.cc/t/polling-the-serial-com-port-using-arduino/46085)
**Author:** [@system](https://forum.arduino.cc/u/system)\ **Replies:** 12\ **Last updated:** [January 23, 2011, 12:41pm UTC](https://forum.arduino.cc/t/polling-the-serial-com-port-using-arduino/46085 "2011-01-23T12:41:19Z")
how can i continuously check the value in the usb port? im supposed to have this visual basic program to send "1" to the serial port and i want the arduino to continuously check its value in real time. because if there … --- ## [reading digital INPUT for 30 sec: at least one 1](https://forum.arduino.cc/t/reading-digital-input-for-30-sec-at-least-one-1/49803)
**Author:** [@system](https://forum.arduino.cc/u/system)\ **Replies:** 7\ **Last updated:** [January 23, 2011, 12:29pm UTC](https://forum.arduino.cc/t/reading-digital-input-for-30-sec-at-least-one-1/49803 "2011-01-23T12:29:51Z")
Hi! Problem: I have a digital input connected to a digital sensor, that of course sends 0/1. I need to check that, in 30 seconds, there has been at least one 1. How would you do that? I have never used arduino's cloc… --- ## [another cnc mill questionaire](https://forum.arduino.cc/t/another-cnc-mill-questionaire/40592)
**Author:** [@system](https://forum.arduino.cc/u/system)\ **Replies:** 134\ **Last updated:** [January 23, 2011, 11:34am UTC](https://forum.arduino.cc/t/another-cnc-mill-questionaire/40592 "2011-01-23T11:34:21Z")
hi there, i know there is a lot stuff out there and i did a lot of research in google and and several forums. i want to build a cnc mill using an arduino (uno or duemilanove) with three axes. i already connected three e… --- ## [Printing floating point numbers to LCD](https://forum.arduino.cc/t/printing-floating-point-numbers-to-lcd/46084)
**Author:** [@system](https://forum.arduino.cc/u/system)\ **Replies:** 3\ **Last updated:** [January 23, 2011, 11:15am UTC](https://forum.arduino.cc/t/printing-floating-point-numbers-to-lcd/46084 "2011-01-23T11:15:48Z")
Hey gang, on a project i'm working on it all works fine except for printing floating point values. I had been using serial.print for debugging until I discovered that serial.print can't print floats. So as I was using a… --- ## [Setting Alarm Problem](https://forum.arduino.cc/t/setting-alarm-problem/46083)
**Author:** [@system](https://forum.arduino.cc/u/system)\ **Replies:** 5\ **Last updated:** [January 23, 2011, 10:52am UTC](https://forum.arduino.cc/t/setting-alarm-problem/46083 "2011-01-23T10:52:53Z")
I want to set an alarm with a specified serially read time I've tried every thing i can ,I even created a new function inside the library but nothing get me there I need Help void loop() { digitalClockDisplay(); A… --- ## [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. … --- ## [LinuxMint 10 - IDE install  \[SOLVED\]](https://forum.arduino.cc/t/linuxmint-10-ide-install-solved/49802)
**Author:** [@fanjanc\_gmail.com](https://forum.arduino.cc/u/fanjanc_gmail.com)\ **Replies:** 3\ **Last updated:** [January 23, 2011, 10:05am UTC](https://forum.arduino.cc/t/linuxmint-10-ide-install-solved/49802 "2011-01-23T10:05:15Z")
I have been working on linux for about a year now and love it, yet there are many little things that I just don't understand like the installation of software packages when not using the software manager or synaptic mana… --- ## [Burn Bootloader -\> w/ Arduino as ISP option](https://forum.arduino.cc/t/burn-bootloader-w-arduino-as-isp-option/46082)
**Author:** [@system](https://forum.arduino.cc/u/system)\ **Replies:** 33\ **Last updated:** [January 23, 2011, 9:49am UTC](https://forum.arduino.cc/t/burn-bootloader-w-arduino-as-isp-option/46082 "2011-01-23T09:49:37Z")
Hi, Wanted to ask under the tools-\>Burn Bootloader option, there's one which says: w/ Arduino as ISP What does it do exactly? Does it turn my arduino into an avr programmer straight? If so, what hardware changes do I … --- ## [Serial monitor bug in version 22](https://forum.arduino.cc/t/serial-monitor-bug-in-version-22/47119)
**Author:** [@retrolefty](https://forum.arduino.cc/u/retrolefty)\ **Replies:** 0\ **Last updated:** [January 23, 2011, 5:55am UTC](https://forum.arduino.cc/t/serial-monitor-bug-in-version-22/47119 "2011-01-23T05:55:03Z")
There seems to be a baud rate bug in the serial monitor for version 22 (other versions?) of the Arduino IDE, at least for my copy on Windows XP pro sp3. Selecting the 14400 baud rate actually sets the monitor to 9600 bau… --- ## [can't get Simple SPI communication to work](https://forum.arduino.cc/t/cant-get-simple-spi-communication-to-work/46081)
**Author:** [@system](https://forum.arduino.cc/u/system)\ **Replies:** 2\ **Last updated:** [January 23, 2011, 5:23am UTC](https://forum.arduino.cc/t/cant-get-simple-spi-communication-to-work/46081 "2011-01-23T05:23:10Z")
I'm working on communicating with a AD9833 DDS chip and have not been able to get it to work. After reading up on how to do hardware spi, I came up with the following code. Also, from a data sheet I discovered that I nee… --- ## [help with syntax problem.](https://forum.arduino.cc/t/help-with-syntax-problem/46080)
**Author:** [@system](https://forum.arduino.cc/u/system)\ **Replies:** 2\ **Last updated:** [January 23, 2011, 4:23am UTC](https://forum.arduino.cc/t/help-with-syntax-problem/46080 "2011-01-23T04:23:04Z")
I am trying to run this code and I keep getting the following error message at the: void loop() { a function-definition is not allowed here before '{'token Could some explain what is wrong with my code. Thank you. /\* … --- ## [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… --- ## [common cathode seven segments](https://forum.arduino.cc/t/common-cathode-seven-segments/46079)
**Author:** [@system](https://forum.arduino.cc/u/system)\ **Replies:** 1\ **Last updated:** [January 23, 2011, 3:36am UTC](https://forum.arduino.cc/t/common-cathode-seven-segments/46079 "2011-01-23T03:36:16Z")
ok so how do i get the arduino to ground the cathodes on my seven segments. also how do i multiplex??? --- ## [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… --- ## [Help Required - RPM Counter With Analog input](https://forum.arduino.cc/t/help-required-rpm-counter-with-analog-input/49801)
**Author:** [@system](https://forum.arduino.cc/u/system)\ **Replies:** 4\ **Last updated:** [January 23, 2011, 2:31am UTC](https://forum.arduino.cc/t/help-required-rpm-counter-with-analog-input/49801 "2011-01-23T02:31:11Z")
Hello to all, Can any anyone help me? I am trying to make a RPM counter using a hall sensor (UNG3503UA, connected to analog pin 0), by detecting when the voltage drops just below 1/2 of the operational output voltage. … --- ## [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… --- ## [Loop Parenthesis](https://forum.arduino.cc/t/loop-parenthesis/46078)
**Author:** [@anon14995255](https://forum.arduino.cc/u/anon14995255)\ **Replies:** 4\ **Last updated:** [January 23, 2011, 12:52am UTC](https://forum.arduino.cc/t/loop-parenthesis/46078 "2011-01-23T00:52:11Z")
Why are there Parenthesis after loop in Sketch? I am just starting and this bugs the shit out of me. If anyone can give me an answer it would help me alot since I sometimes get hung up on little things like that when lea… --- ## [7-Segment Display Wiring and Programming](https://forum.arduino.cc/t/7-segment-display-wiring-and-programming/40591)
**Author:** [@system](https://forum.arduino.cc/u/system)\ **Replies:** 52\ **Last updated:** [January 23, 2011, 12:06am UTC](https://forum.arduino.cc/t/7-segment-display-wiring-and-programming/40591 "2011-01-23T00:06:40Z")
Hey everyone, I was wondering if someone could help me figure out how to wire and eventually program two 7-segment displays of 4 digits each. I'd like to learn about it as I go. Here is the data sheet for the 7-segment … --- ## [Problem with analogRead()](https://forum.arduino.cc/t/problem-with-analogread/46077)
**Author:** [@g117](https://forum.arduino.cc/u/g117)\ **Replies:** 8\ **Last updated:** [January 22, 2011, 11:37pm UTC](https://forum.arduino.cc/t/problem-with-analogread/46077 "2011-01-22T23:37:29Z")
Hi! I'm trying to read an analog value from my photocell, but simply I can't compile my program, because I can't set the input pin to A0 (or A-whatever). My loop(): void loop() { int sensor = analogRead(A0); Serial… --- ## [Address of a function?](https://forum.arduino.cc/t/address-of-a-function/46076)
**Author:** [@system](https://forum.arduino.cc/u/system)\ **Replies:** 0\ **Last updated:** [January 22, 2011, 10:53pm UTC](https://forum.arduino.cc/t/address-of-a-function/46076 "2011-01-22T22:53:53Z")
I was playing around seeing where the Arduino stores things in memory . I used the following program: int a; int b=5; void setup() { int c = 6; int d = 7; unsigned long val; Serial.begin(9600); val = (u… --- ## [Monitor Twitter](https://forum.arduino.cc/t/monitor-twitter/40590)
**Author:** [@system](https://forum.arduino.cc/u/system)\ **Replies:** 4\ **Last updated:** [January 22, 2011, 9:38pm UTC](https://forum.arduino.cc/t/monitor-twitter/40590 "2011-01-22T21:38:20Z")
I was just wondering, i want my arduino to do something every time i tweet something to it. How could i do this? I only want it to do the task only when I tweet it. --- ## [Can't find Wstring.h library](https://forum.arduino.cc/t/cant-find-wstring-h-library/46075)
**Author:** [@system](https://forum.arduino.cc/u/system)\ **Replies:** 5\ **Last updated:** [January 22, 2011, 9:28pm UTC](https://forum.arduino.cc/t/cant-find-wstring-h-library/46075 "2011-01-22T21:28:30Z")
I need to download the WString.h library. I cannot find a copy to download. I have been sent to String() - Arduino Reference but I do not see anywhere to download the library where this sends me to. It appears the tutori… --- ## [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… --- ## [How to manage Arduino memory?](https://forum.arduino.cc/t/how-to-manage-arduino-memory/49800)
**Author:** [@1Pats](https://forum.arduino.cc/u/1Pats)\ **Replies:** 3\ **Last updated:** [January 22, 2011, 7:36pm UTC](https://forum.arduino.cc/t/how-to-manage-arduino-memory/49800 "2011-01-22T19:36:29Z")
I had created array of structures. It contains sunrise, sunshine and noon times for each day of the year- has predefined data. Looks like array is too long, as, if it contains more than 212 elements, code stops working … --- ## [trouble varying pwm in sample program](https://forum.arduino.cc/t/trouble-varying-pwm-in-sample-program/46074)
**Author:** [@system](https://forum.arduino.cc/u/system)\ **Replies:** 25\ **Last updated:** [January 22, 2011, 6:56pm UTC](https://forum.arduino.cc/t/trouble-varying-pwm-in-sample-program/46074 "2011-01-22T18:56:28Z")
Hi everybody. I'm new to the ardunio platform, so i'm trying to teach my self how to program this thing to vary the pwm using 5 inputs (A0 though A4). that will be later . right now i am attepting varying the pwm just us… --- ## [Smoothing multiple sensors](https://forum.arduino.cc/t/smoothing-multiple-sensors/46073)
**Author:** [@system](https://forum.arduino.cc/u/system)\ **Replies:** 2\ **Last updated:** [January 22, 2011, 6:52pm UTC](https://forum.arduino.cc/t/smoothing-multiple-sensors/46073 "2011-01-22T18:52:45Z")
I am in the process of developing a 4-channel fan controller based upon using input from 4 temperature sensors. I have the single channel code working like a charm, however I am at a loss on how to smooth the input from … --- ## [About constructors with no parameters](https://forum.arduino.cc/t/about-constructors-with-no-parameters/46072)
**Author:** [@liuzengqiang](https://forum.arduino.cc/u/liuzengqiang)\ **Replies:** 2\ **Last updated:** [January 22, 2011, 6:09pm UTC](https://forum.arduino.cc/t/about-constructors-with-no-parameters/46072 "2011-01-22T18:09:26Z")
I have got a compile error and searched around for a solution and found it. But can someone tell me why this solution should work? Thanks! Class myClass { myClass(); }; Problem: myClass instance1(); // Doesn't work… [Previous page](https://forum.arduino.cc/c/forum-2005-2010-read-only/software/55.md?page=1) [Next page](https://forum.arduino.cc/c/forum-2005-2010-read-only/software/55.md?page=3)