I'm using the example code and get a ping response from the IP it connects to, but serving from and telnet to a variety of ports always fails with Connection Refused on two different networks. Anyone have a clue?
#include <SPI.h>
#include <WiFi.h>
char ssid[] = "ckp"; // your network SSID (name)
char pass[] = "password"; // your network password
int keyIndex = 0; // your network key Index number (needed only for WEP)
int status = WL_IDLE_STATUS;
WiFiServer server(23);
void setup() {
//Initialize serial and wait for port to open:
Serial.begin(2400);
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);
}
// 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);
}
server.begin();
// you're connected now, so print out the status:
printWifiStatus();
}
void loop() {
// listen for incoming clients
WiFiClient client = server.available();
if (client) {
Serial.println("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");
}
}
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");
}
Serial output:
Attempting to connect to SSID: ckp
SSID: ckp
IP Address: 10.1.9.24
signal strength (RSSI):-65 dBm
?
Ping:
CK:arduino etw$ ping 10.1.9.24
PING 10.1.9.24 (10.1.9.24): 56 data bytes
64 bytes from 10.1.9.24: icmp_seq=0 ttl=255 time=46.712 ms
64 bytes from 10.1.9.24: icmp_seq=1 ttl=255 time=3.614 ms
64 bytes from 10.1.9.24: icmp_seq=2 ttl=255 time=3.679 ms
Telnet:
CK:arduino etw$ telnet 10.1.9.24 23
Trying 10.1.9.24...
telnet: connect to address 10.1.9.24: Connection refused
telnet: Unable to connect to remote host
