Host a Web Server on the Arduino UNO WiFi Rev2

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1#include <WiFiNINA.h>
2
3char ssid[] = "";             //  your network SSID (name) between the " "
4char pass[] = "";      // your network password between the " "
5int keyIndex = 0;                 // your network key Index number (needed only for WEP)
6int status = WL_IDLE_STATUS;      //connection status
7WiFiServer server(80);            //server socket
8
9WiFiClient client = server.available();
10
11int ledPin = 2;
12
13void setup() {
14  Serial.begin(9600);
15  pinMode(ledPin, OUTPUT);
16  while (!Serial);
17  
18  enable_WiFi();
19  connect_WiFi();
20
21  server.begin();
22  printWifiStatus();
23
24}
25
26void loop() {
27  client = server.available();
28
29  if (client) {
30    printWEB();
31  }
32}
33
34void printWifiStatus() {
35  // print the SSID of the network you're attached to:
36  Serial.print("SSID: ");
37  Serial.println(WiFi.SSID());
38
39  // print your board's IP address:
40  IPAddress ip = WiFi.localIP();
41  Serial.print("IP Address: ");
42  Serial.println(ip);
43
44  // print the received signal strength:
45  long rssi = WiFi.RSSI();
46  Serial.print("signal strength (RSSI):");
47  Serial.print(rssi);
48  Serial.println(" dBm");
49
50  Serial.print("To see this page in action, open a browser to http://");
51  Serial.println(ip);
52}
53
54void enable_WiFi() {
55  // check for the WiFi module:
56  if (WiFi.status() == WL_NO_MODULE) {
57    Serial.println("Communication with WiFi module failed!");
58    // don't continue
59    while (true);
60  }
61
62  String fv = WiFi.firmwareVersion();
63  if (fv < "1.0.0") {
64    Serial.println("Please upgrade the firmware");
65  }
66}
67
68void connect_WiFi() {
69  // attempt to connect to Wifi network:
70  while (status != WL_CONNECTED) {
71    Serial.print("Attempting to connect to SSID: ");
72    Serial.println(ssid);
73    // Connect to WPA/WPA2 network. Change this line if using open or WEP network:
74    status = WiFi.begin(ssid, pass);
75
76    // wait 10 seconds for connection:
77    delay(10000);
78  }
79}
80
81void printWEB() {
82
83  if (client) {                             // if you get a client,
84    Serial.println("new client");           // print a message out the serial port
85    String currentLine = "";                // make a String to hold incoming data from the client
86    while (client.connected()) {            // loop while the client's connected
87      if (client.available()) {             // if there's bytes to read from the client,
88        char c = client.read();             // read a byte, then
89        Serial.write(c);                    // print it out the serial monitor
90        if (c == '\n') {                    // if the byte is a newline character
91
92          // if the current line is blank, you got two newline characters in a row.
93          // that's the end of the client HTTP request, so send a response:
94          if (currentLine.length() == 0) {
95
96            // HTTP headers always start with a response code (e.g. HTTP/1.1 200 OK)
97            // and a content-type so the client knows what's coming, then a blank line:
98            client.println("HTTP/1.1 200 OK");
99            client.println("Content-type:text/html");
100            client.println();
101           
102            //create the buttons
103            client.print("Click <a href=\"/H\">here</a> turn the LED on<br>");
104            client.print("Click <a href=\"/L\">here</a> turn the LED off<br><br>");
105            
106            int randomReading = analogRead(A1);
107            client.print("Random reading from analog pin: ");
108            client.print(randomReading);
109           
110            
111            
112
113            // The HTTP response ends with another blank line:
114            client.println();
115            // break out of the while loop:
116            break;
117          }
118          else {      // if you got a newline, then clear currentLine:
119            currentLine = "";
120          }
121        }
122        else if (c != '\r') {    // if you got anything else but a carriage return character,
123          currentLine += c;      // add it to the end of the currentLine
124        }
125
126        if (currentLine.endsWith("GET /H")) {
127        digitalWrite(ledPin, HIGH);        
128        }
129        if (currentLine.endsWith("GET /L")) {
130        digitalWrite(ledPin, LOW);       
131        }
132
133      }
134    }
135    // close the connection:
136    client.stop();
137    Serial.println("client disconnected");
138  }
139}