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Deutsch / Re: FileNamen werden nicht vol...
Last post by combie - Today at 07:21 am
void FilesEinlesen(File pfad, int numTabs)
Vorsicht Falle: Das ruft sich rekursiv auf.

Project Guidance / Re: Multiple LED hoops
Last post by GoForSmoke - Today at 07:12 am
If your RF message addresses one or a group of hoops and your hoops know their names and affiliations then a single RF channel should do for all. Keep the names short, 1 or 2 chars and the messages will go quick. 
And simplify void loop, to see the return.

Code: [Select]
void loop() {
  if (Serial1.available()) {

I noticed the following:

If the IDE is open, I get the return correctly.

But if the IDE is closed, I receive the return, but as an unknown character, as if the baud was wrong, understand?
I recently installed Arduino 1.6.10 on my mac and it works fine; however I am trying to program it using python from the terminal. I was told to install pyserial but it still does not work.
Programming Questions / Re: pushbutton logic
Last post by MorganS - Today at 07:04 am
I would use a for() loop to cycle through all the buttons and count how many are pushed.
Code: [Select]
int buttonArray[] = {2,3,4,5,6,7,8}; //use your own pin assignments here
void setup(){
  for(int i=0; i<sizeof(buttonArray)/sizeof(buttonArray[0]; i++) {
    pinMode(buttonArray[i], INPUT_PULLUP);
void loop(){
  int buttonPressed;
  int countButtonPressed = 0;
  for(int i=0; i<sizeof(buttonArray)/sizeof(buttonArray[0]; i++) {
    if(digitalRead(buttonArray[i]) == LOW) {
      buttonPressed = i;
  if(countButtonPressed == 0){
    //do nothing
  } else if(countButtonPressed == 1){
    //do something
  } else {
    //emergency stop
Help me
I want to Conevert String to HEX
Ex. I send FF from Serial monitor

It's show output FF in HEX
and Show binary convert 11111111

Sorry my english not strenght     

Sensors / Re: proximity sensor (range up...
Last post by himas - Today at 06:57 am
sorry for the less details ..... i want to  make alert sound if someone enter specific area that sensor cover (70m straight line)
Software / Re: libreria wire
Last post by gpb01 - Today at 06:56 am
La libreria è nell'IDE ... TU non la trovi, (... è all'interno del "Core" di Arduino), ma c'è quindi NON devi fare altro che:

#include <Wire.h>

in testa al programma.


P.S.: Ti prego inoltre di scrivere queste cose nel thread e NON usare il "Report a Moderatore" che serve per le violazioni del regolamneto o altri casi gravi di segnalazione di post. Grazie.
i have made a circuit for controlling home appliances like light fan etc.
when i control lightning load arduino works fine but when control fan or operate fan after two or three time operation it hangs/freeze the arduino.
i m using atmega 328 ic, uln2003, 12v relay for controlling 230v ac load.
Project Guidance / Re: Which Arduino to Buy?
Last post by GoForSmoke - Today at 06:53 am
If you are going to use shields, buy an Uno. If you are going to build a circuit on a breadboard, buy a Nano. You can't plug an Uno into a breadboard.
I agree, the ratnest level going from Uno headers over to a breadboard is avoided.

But for shields (generally not my bag) and *Compatibility!* the Uno is it, a DIP 328P Uno lets you replace the chip (needs to be bootloaded which you can do with a working Arduino and cheap gear) when you've burned a pin (it can happen) or want to make end-products and not lose your development board.   

If you buy a knockoff then at least donate extra when you get the Arduino software.
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