Wifi Sensor HTML not working

Hi all
I am working on a project where i am making sensors transmit to a very basic html page. I can upload the code, so i don’t have any arduino coding errors, but the html page just does not work. I mostly get the


error, and it should be showing my sensor data.

I am using an arduino uno wifi rev2.

Any thoughts on what i can do or how to help?

P.S. i have blanked out my network username and password for privacy reasons
excuse all my //notes - it’s documentation as its a school project :slight_smile:

#define DHTPIN 11          // Which pin my DHT (temp + humidity sensor) is connected to
#include "DHT.h"           // Including the Library allowing you to use a DHT
#define DHTTYPE DHT22      // What type of DHT I own
#include <SPI.h>           // The library for communicating with other devices- I spent weeks trying to find out 
                           // why my code wouldn't work and this was the answer
#include <WiFiNINA.h>      // Including the Library allowing me to connect to WiFi

int soilPin = A0;          // The Analog pin my soil sensor is connected to
int tempPin = 11;          // The Digital pin my temperature and humidity temperature is connected to
int lightPin = A2;         // The Analog pin my photoresistor is connected to

char ssid[] = "-------";     // Network SSID (name)
char pass[] = "-------";    // Network password
// int keyIndex = 0;             // Network key Index number (needed only for WEP)

WiFiServer server(80);           // Declare server object and specify port, 80 is port used for internet
int status = WL_IDLE_STATUS;     // Status of wifi

DHT dht(DHTPIN, DHTTYPE);        // Small bit of code allowing my DHT to read information
                                 // I spent weeks trying to find why it wouldn't work, before adding this

void setup() {                // Complete this code upon setup and never again
  Serial.begin(9600);         // Start the Serial Monitor, allowing me to print sensor data
  dht.begin();                // Begin my DHT sensor
  pinMode(soilPin, INPUT);        // Set soilPin as an Input (to recieve data)
  pinMode(tempPin, INPUT);        // Set tempPin as an Input (to recieve data)
  while ( status != WL_CONNECTED) {        // Attempt to connect to Wifi network
    status = WiFi.begin(ssid, pass);       // Connect to WPA/WPA2 network. Change this line if using open or WEP network
    delay(10000);                          // Delay 10 seconds (allow for connection)
  server.begin();             // Begin the WiFi

void loop() {            // Start 
  WiFiClient client = server.available();   // listen for incoming clients
  if (client) {                             // if you get a client,
  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");
            float h = dht.readHumidity();
            float t = dht.readTemperature();

            client.print("Humidity: ");
            client.println(" %\t");
            client.print("Temperature: "); 
            client.println(" *C ");
            client.print("  Soil Moisture: ");    
            client.print("Light Value:  ");

            // The HTTP response ends with another blank line:
            // break out of the while loop:
          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
}      }

Normally (assuming this is an ESP8266 device) the server is handled differently.

client is a client; so for outgoing connections.

You usually have one or more server.on("/", handleRoot); lines where you define the available services, and then you call server.handleClient() in the loop() to check for incoming connections.

See also this example.