Hi all!
I have a Arduino Leonardo board with WiFi Shield. I updated the WiFi Shield to the 1.1.0 firmware version (latest).
I compiled and downloaded the following sketch, lightly derived from the "WiFi UDP Send and Receive String" sketch.
/*
WiFi UDP Send and Receive String
This sketch wait an UDP packet on localPort using a WiFi shield.
When a packet is received an Acknowledge packet is sent to the client on port remotePort
Circuit:
* WiFi shield attached
created 30 December 2012
by dlf (Metodo2 srl)
*/
#include <SPI.h>
#include <WiFi.h>
#include <WiFiUdp.h>
int status = WL_IDLE_STATUS;
int keyIndex = 0; // your network key Index number (needed only for WEP)
/* ===== My changes - BEGIN ===== */
char ssid[] = "Kraun"; // your network SSID (name)
char pass[] = "kraun_test"; // your network password (use for WPA, or use as key for WEP)
unsigned int localPort = 6454; // local port to listen on
uint8_t localIp[4] = { 10, 3, 2, 205};
/* ===== My changes - END ===== */
char packetBuffer[255]; //buffer to hold incoming packet
char ReplyBuffer[] = "acknowledged"; // a string to send back
WiFiUDP Udp;
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);
}
/* ===== My changes - BEGIN ===== */
WiFi.config(localIp);
/* ===== My changes - END ===== */
// attempt to connect to Wifi network:
while ( status != WL_CONNECTED) {
Serial.print("Attempting to connect to SSID: ");
Serial.println(ssid);
// Connect to WPA/WPA2 network. Change this line if using open or WEP network:
status = WiFi.begin(ssid, pass);
// wait 10 seconds for connection:
delay(10000);
}
Serial.println("Connected to wifi");
printWifiStatus();
Serial.println("\nStarting connection to server...");
// if you get a connection, report back via serial:
Serial.println(Udp.begin(localPort));
}
void loop() {
// if there's data available, read a packet
int packetSize = Udp.parsePacket();
if(packetSize)
{
Serial.print("Received packet of size ");
Serial.println(packetSize);
Serial.print("From ");
IPAddress remoteIp = Udp.remoteIP();
Serial.print(remoteIp);
Serial.print(", port ");
Serial.println(Udp.remotePort());
// read the packet into packetBufffer
int len = Udp.read(packetBuffer,255);
if (len >0) packetBuffer[len]=0;
Serial.println("Contents:");
Serial.println(packetBuffer);
// send a reply, to the IP address and port that sent us the packet we received
Udp.beginPacket(Udp.remoteIP(), Udp.remotePort());
Udp.write(ReplyBuffer);
Udp.endPacket();
}
}
void printWifiStatus() {
// print the SSID of the network you're attached to:
Serial.print("SSID: ");
Serial.println(WiFi.SSID());
// print your WiFi shield's IP address:
IPAddress ip = WiFi.localIP();
Serial.print("IP Address: ");
Serial.println(ip);
// print the received signal strength:
long rssi = WiFi.RSSI();
Serial.print("signal strength (RSSI):");
Serial.print(rssi);
Serial.println(" dBm");
}
I'm trying to establish an UDP connection between the Arduino hardware and a PC, connected directly to an access point. Running the example, the communication is established but every about 1 minute the WiFi Shield Communication Error LED turns on for about 5 seconds; obviously during this time the communication is down. This behaviour is independent from the amount of data exchanged on the wireless network (I used a simple utility that sends "test" string every 5 seconds or 1 second).
Any help will be appreciated. Thanks.