LiquidCrystal + Ethernet

Bonjour,

je viens d'arriver dans la communauté j’espère bientôt partager mes ressources sur mon projet de domotique. Comme tout débutant je bute sur un souci. Pourriez vous me donner la raison pour laquelle ce code n'affiche rien sur le lcd ? :relaxed:

merci d'avance

/*
  Web Server
 
 A simple web server that shows the value of the analog input pins.
 using an Arduino Wiznet Ethernet shield. 
 
 Circuit:
 * Ethernet shield attached to pins 10, 11, 12, 13
 * Analog inputs attached to pins A0 through A5 (optional)
 
 created 18 Dec 2009
 by David A. Mellis
 modified 9 Apr 2012
 by Tom Igoe
 
 */

#include <SPI.h>
#include <Ethernet.h>
#include <LiquidCrystal.h>

// Enter a MAC address and IP address for your controller below.
// The IP address will be dependent on your local network:
byte mac[] = { 
  0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED };
IPAddress ip(10,0,40,16);

// Initialize the Ethernet server library
// with the IP address and port you want to use 
// (port 80 is default for HTTP):
EthernetServer server(80);

LiquidCrystal lcd(12, 11, 5, 4, 3, 2);
 
void setup() {
   lcd.begin(16, 2);
   // Print a message to the LCD.
   //lcd.print("hello, world!");

   
 // Open serial communications and wait for port to open:
  Serial.begin(9600);
   while (!Serial) {
    ; // wait for serial port to connect. Needed for Leonardo only
  }


  // start the Ethernet connection and the server:
  Ethernet.begin(mac, ip);
  server.begin();
  Serial.print("server is at ");
  Serial.println(Ethernet.localIP());
}


void loop() {
  // listen for incoming clients
  EthernetClient client = server.available();
  if (client) {
    Serial.println("new client");
    lcd.setCursor(0, 1);
    lcd.print("new client");
    // an http request ends with a blank line
    boolean currentLineIsBlank = true;
    while (client.connected()) {
      if (client.available()) {
        char c = client.read();
        Serial.write(c);
        // if you've gotten to the end of the line (received a newline
        // character) and the line is blank, the http request has ended,
        // so you can send a reply
        if (c == '\n' && currentLineIsBlank) {
          // send a standard http response header
          client.println("HTTP/1.1 200 OK");
          client.println("Content-Type: text/html");
          client.println("Connection: close");  // the connection will be closed after completion of the response
	  client.println("Refresh: 5");  // refresh the page automatically every 5 sec
          client.println();
          client.println("<!DOCTYPE HTML>");
          client.println("<html>");
          // output the value of each analog input pin
          for (int analogChannel = 0; analogChannel < 6; analogChannel++) {
            int sensorReading = analogRead(analogChannel);
            client.print("analog input ");
            client.print(analogChannel);
            client.print(" is ");
            client.print(sensorReading);
            client.println("
");       
          }
          client.println("</html>");
          break;
        }
        if (c == '\n') {
          // you're starting a new line
          currentLineIsBlank = true;
        } 
        else if (c != '\r') {
          // you've gotten a character on the current line
          currentLineIsBlank = false;
        }
      }
    }
    // give the web browser time to receive the data
    delay(1);
    // close the connection:
    client.stop();
    Serial.println("client disonnected");
    lcd.setCursor(0, 2);
    lcd.print("new client");
  }

}

Facile.....

laul:

 * Ethernet shield attached to pins 10, 11, 12, 13
 LiquidCrystal lcd(12, 11, 5, 4, 3, 2);

Trouve des autres pins pour le LCD, pour un de mes projets avec ethernet et lcd j'utilise 14, 15, 16, 17, 18, 19 :

const int RS=14; //declaration constante de broche
const int E=15; //declaration constante de broche
const int D4=16; //declaration constante de broche
const int D5=17; //declaration constante de broche
const int D6=18; //declaration constante de broche
const int D7=19; //declaration constante de broche 

LiquidCrystal lcd(RS, E, D4, D5, D6, D7);// Création d'un objet LiquidCrystal = initialisation LCD en mode 4 bits

Effectivement je l'avais lu en plus.

merci Jean-François :wink: