wifi_box.ino

#include <SPI.h>
#include <WiFiNINA.h>

#include "secret.h"

char ssid[] = SECRET_SSID;        // your network SSID (name)
char pass[] = SECRET_PASS;    // your network password (use for WPA, or use as key for WEP)
int keyIndex = 0;                 // your network key index number (needed only for WEP)

int status = WL_IDLE_STATUS;
WiFiServer server(80);

int lastOpenTime = 0;
bool activeOutput = false;

void setup() {
    Serial.begin(9600);      // initialize serial communication
    pinMode(4, OUTPUT);      // set the LED pin mode

    // check for the WiFi module:
    if (WiFi.status() == WL_NO_MODULE) {
        Serial.println("Communication with WiFi module failed!");
        // don't continue
        while (true);
    }

    String fv = WiFi.firmwareVersion();
    if (fv < WIFI_FIRMWARE_LATEST_VERSION) {
        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() {
    if(activeOutput && lastOpenTime + 5000 < millis()){
        switchOff();
        Serial.println("switchOff");
    }

    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=\"/H\">here</a> turn the LED on pin 4 on<br>");
                        client.print("Click <a href=\"/L\">here</a> turn the LED on pin 4 off<br>");

                        // The HTTP response ends with another blank line:
                        client.println();

                        Serial.println(currentLine);
                        // 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 /H")) {
                    digitalWrite(4, HIGH);               // GET /H turns the LED on
                    activeOutput = true;
                    lastOpenTime = millis();
                }
                if (currentLine.endsWith("GET /L")) {
                    digitalWrite(4, LOW);                // GET /L turns the LED off
                }
            }
        }
        // close the connection:
        client.stop();
        Serial.println("client disconnected");
    }
}

void switchOff() {
    digitalWrite(4, LOW);
    activeOutput = false;
}

void printWifiStatus() {
    // print the SSID of the network you're attached to:
    Serial.print("SSID: ");
    Serial.println(WiFi.SSID());

    // print your board'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);
}