2022-12-20 16:30:25 +01:00
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#include <WiFi.h>
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2022-12-20 16:46:11 +01:00
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#include <DHT.h>
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#include "credentials.h" // put your WIFI credentials in here
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#define DHT_SENSOR_PIN 21 // ESP32 pin GIOP21 connected to DHT11 sensor
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#define DHT_SENSOR_TYPE DHT11
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#define AOUT_PIN 36 // ESP32 pin GIOP36 (ADC0) that connects to AOUT pin of moisture sensor
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DHT dht_sensor(DHT_SENSOR_PIN, DHT_SENSOR_TYPE);
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2022-12-20 16:30:25 +01:00
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// Replace with your network credentials
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const char* ssid = secrect_ssid;
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const char* password = secret_password;
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// Set web server port number to 80
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WiFiServer server(80);
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// Variable to store the HTTP request
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String header;
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// Current time
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unsigned long currentTime = millis();
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// Previous time
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unsigned long previousTime = 0;
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// Define timeout time in milliseconds (example: 2000ms = 2s)
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const long timeoutTime = 2000;
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void setup() {
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2022-12-20 16:46:11 +01:00
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Serial.begin(9600);
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dht_sensor.begin(); // initialize the DHT sensor
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2022-12-20 16:30:25 +01:00
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// Connect to Wi-Fi network with SSID and password
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Serial.print("Connecting to ");
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Serial.println(ssid);
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WiFi.begin(ssid, password);
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while (WiFi.status() != WL_CONNECTED) {
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delay(500);
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Serial.print(".");
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}
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// Print local IP address and start web server
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Serial.println("");
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Serial.println("WiFi connected.");
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Serial.println("IP address: ");
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Serial.println(WiFi.localIP());
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server.begin();
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}
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void loop(){
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2022-12-20 16:46:11 +01:00
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// read humidity
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float humi = dht_sensor.readHumidity();
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// read temperature in Celsius
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float tempC = dht_sensor.readTemperature();
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// read temperature in Fahrenheit
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float tempF = dht_sensor.readTemperature(true);
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// read soil
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int soil = analogRead(AOUT_PIN); // read the analog value from sensor
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2022-12-20 16:30:25 +01:00
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WiFiClient client = server.available(); // Listen for incoming clients
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if (client) { // If a new client connects,
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currentTime = millis();
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previousTime = currentTime;
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Serial.println("New Client."); // print a message out in the serial port
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String currentLine = ""; // make a String to hold incoming data from the client
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while (client.connected() && currentTime - previousTime <= timeoutTime) { // loop while the client's connected
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currentTime = millis();
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if (client.available()) { // if there's bytes to read from the client,
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char c = client.read(); // read a byte, then
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Serial.write(c); // print it out the serial monitor
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header += c;
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if (c == '\n') { // if the byte is a newline character
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// if the current line is blank, you got two newline characters in a row.
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// that's the end of the client HTTP request, so send a response:
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if (currentLine.length() == 0) {
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// HTTP headers always start with a response code (e.g. HTTP/1.1 200 OK)
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// and a content-type so the client knows what's coming, then a blank line:
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client.println("HTTP/1.1 200 OK");
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client.println("Content-type:text/html");
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client.println("Connection: close");
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client.println();
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// Display the HTML web page
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client.println("<!DOCTYPE html><html>");
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client.println("<head><meta name=\"viewport\" content=\"width=device-width, initial-scale=1\">");
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client.println("<link rel=\"icon\" href=\"data:,\">");
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// CSS to style the on/off buttons
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// Feel free to change the background-color and font-size attributes to fit your preferences
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client.println("<style>html { font-family: Helvetica; display: inline-block; margin: 0px auto; text-align: center;}");
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client.println(".button { background-color: #4CAF50; border: none; color: white; padding: 16px 40px;");
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client.println("text-decoration: none; font-size: 30px; margin: 2px; cursor: pointer;}");
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client.println(".button2 {background-color: #555555;}</style></head>");
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// Web Page Heading
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2022-12-20 16:46:11 +01:00
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client.println("<body><h1>ESP32</h1>");
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2022-12-20 16:30:25 +01:00
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// Display current state, and ON/OFF buttons for GPIO 26
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2022-12-20 16:46:11 +01:00
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client.println("<p>Temperature ");
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client.println(tempC);
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client.println("°C</p>");
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client.println("<p>Moisture value ");
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client.println(soil);
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client.println("</p>");
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client.println("<script>window.setTimeout(() => {window.location.href = window.location.href}, 1000)</script>");
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2022-12-20 16:30:25 +01:00
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client.println("</body></html>");
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// The HTTP response ends with another blank line
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client.println();
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// Break out of the while loop
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break;
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} else { // if you got a newline, then clear currentLine
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currentLine = "";
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}
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} else if (c != '\r') { // if you got anything else but a carriage return character,
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currentLine += c; // add it to the end of the currentLine
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}
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}
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}
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// Clear the header variable
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header = "";
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// Close the connection
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client.stop();
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Serial.println("Client disconnected.");
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Serial.println("");
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}
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}
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