add iot_esp32

iot_esp32/main.ino

@@ -0,0 +1,78 @@
+#include <WiFi.h>
+#include <Wire.h>
+#include <Adafruit_GFX.h>
+#include <Adafruit_SSD1306.h>
+#include <HTTPClient.h>
+#include <ArduinoJson.h>
+#include <DHT.h>
+
+#define DHT22_PIN 23
+#define SCREEN_WIDTH 128
+#define SCREEN_HEIGHT 64
+const char *ssid = "your_ssid";
+const char *password = "your_password";
+String serverAddress = "your_server_address";
+
+DHT dht22(DHT22_PIN, DHT22);
+Adafruit_SSD1306 oled(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, -1);
+
+void setup()
+{
+    Serial.begin(9600);
+
+    dht22.begin();
+    WiFi.begin(ssid, password);
+    Serial.println("Connecting");
+    while (WiFi.status() != WL_CONNECTED)
+    {
+        delay(500);
+        Serial.print(".");
+    }
+    Serial.println("");
+    Serial.print("Connected to WiFi network with IP Address: ");
+    Serial.println(WiFi.localIP());
+}
+
+void loop()
+{
+    float humi = dht22.readHumidity();
+    float tempC = dht22.readTemperature();
+
+    if (isnan(tempC) || isnan(tempF) || isnan(humi))
+    {
+        Serial.println("Failed to read from DHT22 sensor!");
+    }
+    else
+    {
+        Serial.print("Humidity: ");
+        Serial.print(humi);
+        Serial.print("% | Temperature: ");
+        Serial.print(tempC);
+        Serial.println("°C");
+    }
+
+    if (WiFi.status() == WL_CONNECTED)
+    {
+        JsonDocument doc;
+        doc["temperature"] = tempC;
+        doc["humidity"] = humi;
+        char output[256];
+        serializeJson(doc, output);
+        WiFiClient client;
+        HTTPClient http;
+
+        http.begin(client, serverAddress);
+        http.addHeader("Content-Type", "application/json");
+        int httpResponseCode = http.POST(output);
+        Serial.print("HTTP Response code: ");
+        Serial.println(httpResponseCode);
+
+        http.end();
+    }
+    else
+    {
+        Serial.println("WiFi Disconnected");
+    }
+
+    delay(2000);
+}