#include <ArduinoJson.h>  // Librería para JSON
#include <WiFi.h>
#include <PubSubClient.h>
#include "HX711.h"

// Credenciales WiFi
const char* ssid = "Marared";
const char* password = "mararedproyecto";

// Configuración MQTT
const char* mqtt_server = "test.mosquitto.org";
WiFiClient wifiClient;
PubSubClient client(wifiClient);

// Configuración de la celda de carga
#define LOADCELL_DOUT_PIN 16
#define LOADCELL_SCK_PIN 4
HX711 scale;

void setup() {
  Serial.begin(115200);
  WiFi.begin(ssid, password);

  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println("\nConectado a WiFi");

  client.setServer(mqtt_server, 1883);

  scale.begin(LOADCELL_DOUT_PIN, LOADCELL_SCK_PIN);
  scale.set_scale();  
  Serial.println("Tare... remove any weights from the scale.");
  delay(5000);
  scale.tare();
  Serial.println("Tare done...");
}

void loop() {
  client.loop();

  if (scale.is_ready()) {
    long reading = scale.get_units(10);
    Serial.print("Result: ");
    Serial.println(reading);

    // Crear documento JSON
    StaticJsonDocument<200> doc;
    doc["weight"] = reading;
    doc["unit"] = "grams";
    
    char jsonBuffer[200];
    serializeJson(doc, jsonBuffer);

    // Publicar vía MQTT
    if (client.connect("arduinoClient")) {
      client.publish("outTopic", jsonBuffer);
      client.subscribe("datosHX");
    }
  } else {
    Serial.println("HX711 not found.");
  }

  delay(1000);
}