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Project.ino
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Project.ino
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#include <ESP8266WiFi.h>
#include <ESP8266WebServer.h>
#include <Wire.h>
#include <Adafruit_SSD1306.h>
#include <Adafruit_Sensor.h>
#include <DHT.h>
#include <DHT_U.h>
#define pin 02
#define buzz 14
#define buton 16
#define DHTTYPE DHT11
DHT dht(pin, DHTTYPE);
#define D_W 128
#define D_H 64
//global variables
int flag = 0;
int swtch = 0;
Adafruit_SSD1306 oled(D_W, D_H, &Wire, -1);
// SSID and Password for network connection
#define SSID "MANI SURYA TEJA's S23"
#define passwd "kkkkkkkk"
float humidity;
float Temp;
float TempF;
float set;
float threshold = 1000; // Default threshold value
ESP8266WebServer server(80);
const char* htmlPage = R"rawliteral(
<!DOCTYPE html>
<html>
<head>
<title>Threshold Input</title>
</head>
<body>
<h1>Set Humidity Threshold</h1>
<form action="/setThreshold" method="post">
<label for="threshold">Threshold:</label>
<input type="text" id="threshold" name="threshold">
<input type="submit" value="Submit">
</form>
<h2>Current Threshold: <span id="currentThreshold"></span></h2>
<h2>Current Humidity: <span id="currentHumidity"></span></h2>
<h2>Current Temperature: <span id="currentTemperature"></span></h2>
<script>
function fetchCurrentData() {
fetch('/getCurrentData')
.then(response => response.json())
.then(data => {
document.getElementById('currentThreshold').innerText = data.threshold;
document.getElementById('currentHumidity').innerText = data.humidity;
document.getElementById('currentTemperature').innerText = data.temperature;
});
}
setInterval(fetchCurrentData, 2000); // Fetch current data every 2 seconds
window.onload = fetchCurrentData;
</script>
</body>
</html>
)rawliteral";
void readings() {
humidity = dht.readHumidity();
Temp = dht.readTemperature();
TempF = dht.readTemperature(true);
//clearing the screen for every reading
oled.clearDisplay();
oled.setCursor(25, 20);
oled.printf("Temp : %.1fC\n", Temp);
oled.setCursor(20, 30);
oled.printf("Humidity : %.1f", humidity);
oled.display();
}
void handleRoot() {
//Home Page
server.send(200, "text/html", htmlPage);
}
void handleSetThreshold() {
//Taking input from the form and projecting the given value in next page
if (server.hasArg("threshold")) {
threshold = server.arg("threshold").toFloat();
server.send(200, "text/html", "Threshold set to: " + String(threshold) + "<br><a href='/'>Back</a>");
} else {
server.send(200, "text/html", "Invalid Input<br><a href='/'>Back</a>");
}
}
void handleGetCurrentData() {
//Streams the Live Data
String json = "{\"threshold\":" + String(threshold) + ",\"humidity\":" + String(humidity) + ",\"temperature\":" + String(Temp) + "}";
server.send(200, "application/json", json);
}
void setup() {
// Serialport for monitoring the data
Serial.begin(115200);
pinMode(pin, INPUT);
pinMode(buzz, OUTPUT);
pinMode(buton, INPUT);
if (!oled.begin(SSD1306_SWITCHCAPVCC, 0x3C)) {
Serial.println(F("SSD1306 allocation failed"));
}
delay(2000); // wait for initializing
oled.clearDisplay(); // clear display
oled.setTextSize(1);
oled.setTextColor(WHITE);
oled.setCursor(32, 10);
oled.println("Hey Mani!!!");
oled.display();
delay(2000);
oled.println("Check out Today's Weather!!");
oled.display();
delay(1000);
//Commands to connect to a network
dht.begin();
WiFi.begin(SSID, passwd);
//tries for unlimited times with delay of 500ms
while (WiFi.status() != WL_CONNECTED) {
delay(500);
Serial.print(".");
}
Serial.println("");
Serial.println("WiFi connected");
server.on("/", handleRoot);
server.on("/setThreshold", HTTP_POST, handleSetThreshold);
server.on("/getCurrentData", HTTP_GET, handleGetCurrentData);
server.begin();
Serial.println("HTTP server started");
Serial.println(WiFi.localIP());
}
void loop() {
server.handleClient();
readings();
// here swtch is a variable to decide the buzzer's availability
// if swtch==1 means it is blocked else buzzer can sound
if ((humidity > threshold) && (swtch == 0)) {
tone(buzz, 100);
}
flag = digitalRead(buton);
if (flag) {
Serial.println("Pressed");
noTone(buzz);
swtch = 1;
}
if (humidity < threshold) {
swtch = 0;
noTone(buzz);
}
delay(200);
}