#include <WiFi.h>
#include "ThingSpeak.h"
#include "DHT.h"

#define DHTPIN 15
#define DHTTYPE DHT22

DHT dht(DHTPIN, DHTTYPE);
WiFiClient client;

const char* ssid = "YOUR_WIFI_SSID";
const char* password = "YOUR_WIFI_PASSWORD";

unsigned long channelID = 3045331;
const char* writeKey = "EPPTZUKDGW6MGVSE";
const char* readKey = "OWCB9KV1PDDOGE7T";

void setup() {
  Serial.begin(115200);
  dht.begin();

  WiFi.begin(ssid, password);
  Serial.print("Connecting");
  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
    Serial.print(".");
  }
  Serial.println("\nConnected! IP: " + String(WiFi.localIP()));

  ThingSpeak.begin(client);
}

void loop() {
  float temp = dht.readTemperature();
  float hum = dht.readHumidity();

  if (isnan(temp) || isnan(hum)) {
    Serial.println("Error reading sensor!");
    delay(2000);
    return;
  }

  Serial.print("Temp: "); Serial.print(temp);
  Serial.print(" C, Humidity: "); Serial.println(hum);

  ThingSpeak.setField(1, temp);
  ThingSpeak.setField(2, hum);

  int status = ThingSpeak.writeFields(channelID, writeKey);
  if (status == 200) {
    Serial.println("Sent to ThingSpeak.");
  } else {
    Serial.println("Error sending. Code: " + String(status));
  }

  float lastTemp = ThingSpeak.readFloatField(channelID, 1, readKey);
  int readStatus = ThingSpeak.getLastReadStatus();
  if (readStatus == 200) {
    Serial.print("Last temp from ThingSpeak: "); Serial.println(lastTemp);
  } else {
    Serial.println("Error reading. Code: " + String(readStatus));
  }

  delay(20000);
}