tks i'm going to take a look

pluggy can you post your code pls
of the master and slave arduino

Who do i do that???
Do you know any example???

for 30 meters what i can use ??? or can i boost the signal ???

Hello

I need to communicate values between 3 or more arduino's who can i do that??.

Like this arduino 1 and 2 send and read values from arduino 1 .

All arduinos will be 30 meters apart and need to be connected by cable.

ok i go use this way

hello
What I use then.

I'm doing like this:

#include <LedDisplay.h>

// Define pins for the LED display.
// You can change these, just re-wire your board:
#define dataPin 6              // connects to the display's data in
#define registerSelect 7       // the display's register select pin
#define clockPin 8             // the display's clock pin
#define enable 9               // the display's chip enable pin
#define reset 10               // the display's reset pin
#define displayLength 8        // number of bytes needed to pad the string
// create am instance of the LED display:
LedDisplay myDisplay = LedDisplay(dataPin, registerSelect, clockPin,
enable, reset, displayLength);

int lcdstate = 0; //estado do LCD
long previousMillis = 0;
long interval = 1000;
int brightness = 15;        // screen brightness
char door[]= {' ','D','o','o','r',' ',' ',' '};
char open[] = {' ','O','p','e','n',' ',' ',' ',};
char apagar[]={' ',' ',' ',' ',' ',' ',' ',' ',};
void setup() {
  Serial.begin(9600);

  // initialize the display library:
  myDisplay.begin();
  myDisplay.setString("Jaime");
  myDisplay.home();
  myDisplay.setBrightness(brightness);
}

void loop() {
      if (millis()- previousMillis > interval) {
        previousMillis = millis();
        if (lcdstate == 0){
            myDisplay.home();
            for (int thisPosition = 0; thisPosition < 8; thisPosition++)
              {
               myDisplay.write(door[thisPosition]);
              }
            lcdstate = 1;
        }
        else {    
            myDisplay.home();
            for (int thisPosition = 0; thisPosition < 8; thisPosition++)
             {
              myDisplay.write(open[thisPosition]);
             }
            lcdstate = 0;
        }
        
}
}


like this work. but i think that is not a good way.

Ok I found tks for the help.
But know i have a new problem if i use only the first 5 characters of the display every thing is ok but if i use the 8 characters the last 3 are garbage.

the display is ok because if i use this program and everything works.
http://www.electroniccrafts.org/?n=Code.Hcms
but i need to use the library because i don't want rolling text.
What is wrong whit the library or what I'm doing wrong.

Can you help-me who to do that?

Hello

One question is it possible to display special charaters like ã or ç

if yes who i'm waiting for my display to arrive and i need this ones

TKS