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

const int DHT_PIN = 15; // DHT22 sensor GPIO Pin
const char* WIFI_NAME = "Wokwi-GUEST"; // WiFi SSID
const char* WIFI_PASSWORD = ""; // WiFi Password
const int myChannelNumber = 2589125; // ThingSpeak channel number (semicolon added)
const char* myApiKey = "U0KBDX2IRZK0Z9J6"; // ThingSpeak API key
const char* server = "api.thingspeak.com"; // ThingSpeak server address

DHTesp dhtSensor; // Create an instance of the DHTesp library
WiFiClient client; // Create a WiFi client object

#define MoisensorPin 33

void setup() {
  Serial.begin(115200);
  dhtSensor.setup(DHT_PIN, DHTesp::DHT22); // Initialize the DHT22 sensor

  WiFi.begin(WIFI_NAME, WIFI_PASSWORD); // Connect to the WiFi network
  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
    Serial.println("WiFi not connected");
  }
  Serial.println("WiFi connected!");
  Serial.println("Local IP: " + String(WiFi.localIP())); // Print the local IP address
  WiFi.mode(WIFI_STA); // Set the WiFi mode to station mode
  ThingSpeak.begin(client); // Initialize the ThingSpeak library
}

void loop() {
  // Read temperature and humidity from DHT sensor
  float humidity = dhtSensor.getHumidity();
  float temperatureC = dhtSensor.getTemperature();
  float temperatureF = dhtSensor.toFahrenheit(temperatureC); // Fahrenheit

  // Read soil moisture sensor value
  int moistureValue = analogRead(MoisensorPin);
  moistureValue = map(moistureValue, 0, 4095, 0, 100); // Map ADC range to percentage
  moistureValue = 100 - moistureValue; // Invert percentage

  // Print sensor values
  Serial.print("Temperature: ");
  Serial.print(temperatureC);
  Serial.print(" °C, ");
  Serial.print(temperatureF);
  Serial.print(" °F | Humidity: ");
  Serial.print(humidity);
  Serial.print(" % | Soil Moisture: ");
  Serial.print(moistureValue);
  Serial.println(" %");

  // Set the fields with the values
  ThingSpeak.setField(1, temperatureC);
  ThingSpeak.setField(2, humidity);
  ThingSpeak.setField(3, moistureValue);

  // Write to ThingSpeak
  int x = ThingSpeak.writeFields(myChannelNumber, myApiKey);
  if(x == 200) {
    Serial.println("Channel update successful.");
  } else {
    Serial.println("Problem updating channel. HTTP error code " + String(x));
  }

  delay(200); // ThingSpeak only allows updates every 15 seconds
}