#include <WiFi.h>
#include <PubSubClient.h>

const char* ssid = "Wokwi-GUEST";
const char* password = "";
const char* mqttServer = "thingsboard.cloud";
const int mqttPort = 1883;
const char* mqttUser = "YARBea7H7NdLneM8GCft";
const char* mqttPassword = ""; // Leave blank

WiFiClient espClient;
PubSubClient client(espClient);

void setup_wifi() {
  delay(10);
  Serial.println();
  Serial.print("Connecting to ");
  Serial.println(ssid);
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println("");
  Serial.print("WiFi connected - IP address: ");
  Serial.println(WiFi.localIP());
}

void reconnect() {
  while (!client.connected()) {
    Serial.print("Attempting MQTT connection...");
    if (client.connect("arduinoClient", mqttUser, mqttPassword)) {
      Serial.println("connected");
    } else {
      Serial.print("failed, rc=");
      Serial.print(client.state());
      Serial.println(" try again in 5 seconds");
      delay(5000);
    }
  }
}

void setup() {
  Serial.begin(115200);
  setup_wifi();
  client.setServer(mqttServer, mqttPort);
}

void loop() {
  if (!client.connected()) {
    reconnect();
  }
  client.loop();

  // Read sensor data and publish to ThingsBoard
  float soilMoisture = analogRead(A0) / 1023.0 * 100; // Example: read soil moisture sensor
  char payload[100];
  snprintf(payload, sizeof(payload), "{\"soil_moisture\":%.2f}", soilMoisture);
  client.publish("v1/devices/me/telemetry", payload);
  delay(5000); // Adjust delay based on your requirement
}