I've a big problem
i just got my arduino mega and the wifi shield all official and last version ...
The problem is "WiFi shield not present"
i've tried many examples from the library with the same problem ...
i did read much about this problem
** so i've connected the 7 and 3 pinout.
** i do not connect the framework's jumper
** i've updated the wifi shield
this problem is the same with MEGA or UNO
Anybody PLEASE can help me !! =(
Please post your code.
shyraza:
The problem is "WiFi shield not present"i've tried many examples from the library with the same problem ...
User liudr has posted a workaround for that problem. The problem is with the examples (poor coding), not with the shield. You can read about it here:
muddy:
Please post your code.
here you are
/*
This example prints the Wifi shield's MAC address, and
scans for available Wifi networks using the Wifi shield.
Every ten seconds, it scans again. It doesn't actually
connect to any network, so no encryption scheme is specified.Circuit:
- WiFi shield attached
created 13 July 2010
by dlf (Metodo2 srl)
modified 21 Junn 2012
by Tom Igoe and Jaymes Dec
*/#include <SPI.h>
#include <WiFi.h>void setup() {
//Initialize serial and wait for port to open:
Serial.begin(9600);
while (!Serial) {
; // wait for serial port to connect. Needed for Leonardo only
}// check for the presence of the shield:
if (WiFi.status() == WL_NO_SHIELD) {
Serial.println("WiFi shield not present");
// don't continue:
while(true);
}// Print WiFi MAC address:
printMacAddress();// scan for existing networks:
Serial.println("Scanning available networks...");
listNetworks();
}void loop() {
delay(10000);
// scan for existing networks:
Serial.println("Scanning available networks...");
listNetworks();
}void printMacAddress() {
// the MAC address of your Wifi shield
byte mac[6];// print your MAC address:
WiFi.macAddress(mac);
Serial.print("MAC: ");
Serial.print(mac[5],HEX);
Serial.print(":");
Serial.print(mac[4],HEX);
Serial.print(":");
Serial.print(mac[3],HEX);
Serial.print(":");
Serial.print(mac[2],HEX);
Serial.print(":");
Serial.print(mac[1],HEX);
Serial.print(":");
Serial.println(mac[0],HEX);
}void listNetworks() {
// scan for nearby networks:
Serial.println("** Scan Networks **");
int numSsid = WiFi.scanNetworks();
if (numSsid == -1)
{
Serial.println("Couldn't get a wifi connection");
while(true);
}// print the list of networks seen:
Serial.print("number of available networks:");
Serial.println(numSsid);// print the network number and name for each network found:
for (int thisNet = 0; thisNet<numSsid; thisNet++) {
Serial.print(thisNet);
Serial.print(") ");
Serial.print(WiFi.SSID(thisNet));
Serial.print("\tSignal: ");
Serial.print(WiFi.RSSI(thisNet));
Serial.print(" dBm");
Serial.print("\tEncryption: ");
printEncryptionType(WiFi.encryptionType(thisNet));
}
}void printEncryptionType(int thisType) {
// read the encryption type and print out the name:
switch (thisType) {
case ENC_TYPE_WEP:
Serial.println("WEP");
break;
case ENC_TYPE_TKIP:
Serial.println("WPA");
break;
case ENC_TYPE_CCMP:
Serial.println("WPA2");
break;
case ENC_TYPE_NONE:
Serial.println("None");
break;
case ENC_TYPE_AUTO:
Serial.println("Auto");
break;
}
}
AlxDroidDev:
User liudr has posted a workaround for that problem. The problem is with the examples (poor coding), not with the shield. You can read about it here:
As AlxDroidDev suggested, try modifying the example code by replacing
// check for the presence of the shield:
if (WiFi.status() == WL_NO_SHIELD) {
Serial.println("WiFi shield not present");
// don't continue:
while(true);
}
with
// check for the presence of the shield:
unsigned long start=millis();
while (WiFi.status() == WL_NO_SHIELD)
{
if ((millis()-start)>30000)
{
Serial.println("WiFi shield not present");
// don't continue:
while(true);
}
delay(500);
}
and see if the shield starts being recognized.