I need help. I am trying to configure the web server code to control more than one relay, but the wifi shield only links up to the router when their is only one relay defined and has controls. I am trying to configure it to control more than just one relay for a school project. When I compile and run it shows no errors. But in the serial monitor it waits to connect but never connects and shows the error light on the wifi shield. When their is only one relay defined and configured it works just fine.
#include <SPI.h>
#include <WiFi.h>
#define RELAY1 7
#define RELAY2 6
char ssid[] = "Taylor Senior Project"; // your network SSID (name)
char pass[] = "tanabryan"; // your network password
int keyIndex = 0; // your network key Index number (needed only for WEP)
int status = WL_IDLE_STATUS;
WiFiServer server(80);
void setup() {
pinMode(RELAY1, OUTPUT);
pinMode(RELAY2, OUTPUT);
Serial.begin(9600); // initialize serial communication
// check for the presence of the shield:
if (WiFi.status() == WL_NO_SHIELD) {
Serial.println("WiFi shield not present");
while (true); // don't continue
}
String fv = WiFi.firmwareVersion();
if (fv != "1.1.0") {
Serial.println("Please upgrade the firmware");
}
// attempt to connect to Wifi network:
while (status != WL_CONNECTED) {
Serial.print("Attempting to connect to Network named: ");
Serial.println(ssid); // print the network name (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(); // start the web server on port 80
printWifiStatus(); // you're connected now, so print out the status
}
void loop() {
WiFiClient client = server.available(); // listen for incoming clients
if (client) { // if you get a client,
Serial.println("new client"); // print a message out the serial port
String currentLine = ""; // make a String to hold incoming data from the client
while (client.connected()) { // loop while the client's connected
if (client.available()) { // if there's bytes to read from the client,
char c = client.read(); // read a byte, then
Serial.write(c); // print it out the serial monitor
if (c == '\n') { // if the byte is a newline character
// if the current line is blank, you got two newline characters in a row.
// that's the end of the client HTTP request, so send a response:
if (currentLine.length() == 0) {
// HTTP headers always start with a response code (e.g. HTTP/1.1 200 OK)
// and a content-type so the client knows what's coming, then a blank line:
client.println("HTTP/1.1 200 OK");
client.println("Content-type:text/html");
client.println();
// the content of the HTTP response follows the header:
client.print("Click <a href=\"/H1\">here</a> turn the RELAY1 on
");
client.print("Click <a href=\"/L1\">here</a> turn the RELAY1 off
");
client.print("Click <a href=\"/H2\">here</a> turn the RELAY2 on
");
client.print("Click <a href=\"/L2\">here</a> turn the RELAY2 off
");
// The HTTP response ends with another blank line:
client.println();
// break out of the while loop:
break;
} else { // if you got a newline, then clear currentLine:
currentLine = "";
}
} else if (c != '\r') { // if you got anything else but a carriage return character,
currentLine += c; // add it to the end of the currentLine
}
// Check to see if the client request was "GET /H" or "GET /L":
if (currentLine.endsWith("GET /H1")) {
digitalWrite(RELAY1, HIGH);
}
if (currentLine.endsWith("GET /L1")) {
digitalWrite(RELAY1, LOW);
}
if (currentLine.endsWith("GET /H2")) {
digitalWrite(RELAY2, HIGH);
}
if (currentLine.endsWith("GET /L2")) {
digitalWrite(RELAY2, LOW);
}
}
}
// 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");
// print where to go in a browser:
Serial.print("To see this page in action, open a browser to http://");
Serial.println(ip);
}
Hardware:
Arduino Wifi Shield
Sunfounder 8 channel relay board
Arduino Uno R3