Motor Shield and Attachinterrupt, little interference problem

Projects General Guidance
3

Hi,

The simple code that work :

int buttonInt = 0; //AKA digital pin 2
void setup()
{  attachInterrupt(buttonInt, x_swap, RISING);
  Serial.begin(9600); 
  Serial.println("VOID SETUP"); }
void x_swap()
{   Serial.println("VOID x_SWAP");   }
void loop()
{    Serial.println("VOID LOOP");     delay(3000);   }

My other code with everything :

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

byte mac[] = { 0x90, 0xA2, 0xDA, 0x0E, 0xCE, 0xA1 }; //physical mac address
byte ip[] = { 192, 168, 0, 2 }; // ip in lan
byte gateway[] = { 192, 168, 0, 1 }; // internet access via router
byte subnet[] = { 255, 255, 255, 0 }; //subnet mask
EthernetServer server(80); //server port

String readString; 

//////////////////////
int switchhh = 2;
int pwm = 5;
int dir = 7;
int valswitch = 0;

void setup(){
  //Setup Channel A from Motor shield
  pinMode(pwm, OUTPUT); //Initiates Motor Channel A pin
  pinMode(dir, OUTPUT); //Initiates Brake Channel A pin
  //Start Ethernet
  Ethernet.begin(mac, ip, gateway, gateway, subnet);
  server.begin();
  //enable serial data print 
  Serial.begin(9600); 
  Serial.println("server multi pin button test 1.0"); // so I can keep track of what is loaded

attachInterrupt(1, motor_stop, RISING);

}

void loop(){
  // Create a client connection
  EthernetClient client = server.available();
  if (client) {
    while (client.connected()) {
      if (client.available()) {
        char c = client.read();

        //read char by char HTTP request
        if (readString.length() < 100) {

          //store characters to string 
          readString += c; 
          //Serial.print(c);
        } 

        //if HTTP request has ended
        if (c == '\n') {

          ///////////////
          Serial.println(readString); //print to serial monitor for debuging 

          client.println("HTTP/1.1 200 OK"); //send new page
          client.println("Content-Type: text/html");
          client.println("");
          
          client.println("<HTML><HEAD><TITLE>Projet d'&eacute;tude : ARDUINO et Contr&ocirc;le de panneau solaire</TITLE></HEAD>");
          client.println("<BODY>");
          client.println("<H3>Projet d'&eacute;tude : ARDUINO et Contr&ocircle de panneau solaire</H3>");
          // DIY buttons
          client.println("<a href=/?up2 >Monter</a> <a href=/?down3 >Descendre</a> <a href=/?stop4 >STOP</a>"); 
          client.println("</BODY></HTML>");
          delay(1);
          //stopping client
          client.stop();

          ///////////////////// control arduino pin
          if(readString.indexOf('2') >0)//checks for 2 MONTER
          {
            Serial.println("Bouton monter appuyer !!");
            digitalWrite(dir, HIGH);
            analogWrite(pwm, 255); 
            delay(3000);
            m_stop(); 
            Serial.println("Bouton monter appuyer !!  FIN BOUCLE");
          }
          
          if(readString.indexOf('3') >0)//checks for 3 DESCENDRE
          {
           Serial.println("Bouton descendre appuyer !!");
           digitalWrite(dir, LOW);
           analogWrite(pwm, 255); 
          }
          
          if(readString.indexOf('4') >0)//checks for 3 STOP
          {
            Serial.println("Bouton STOP appuyer !!");
            m_stop(); 
            Serial.println("Bouton STOP appuyer !!  FIN BOUCLE");
          }

      
valswitch = digitalRead(switchhh);
if (valswitch == HIGH)
{
  


          //clearing string for next read
          readString="";

        } 
      }
    }
  }
}}

void motor_stop()
{
  Serial.println("motor_stop begin");
  m_stop();
  Serial.println("motor_stop end");
}

void m_stop()
{
  Serial.println("m_stop start");
digitalWrite(pwm, 0);
Serial.println("m_stop end");
 
}

Many Thanks