/*
  Projekt: MQTT Wifi DSP310 Sensor
  Beschreibung: Dieses Sketch kann zur Nutzung auf einem Arduino UNO R4 Wifi mit dem Sensor DSP310 genutzt werden

  Autor:  Joachim Hummel
  Datum: 08.02.2024 Erstellung

  Arduino-Board:  Arduino Uno R4 WiFi

  Bibliotheken:
  - [Liste der verwendeten Bibliotheken, inklusive Versionen wenn möglich]

  Lizenz: Apache 2.0 

  Hinweise:
  - Die Nutzung des Code beinhaltet keinerlei Garantie oder GewÃhrliestung.
    Die Nutzung erfolgt auf eigenes Risiko ohne Rechtsanspruch


  Credits:
  - Danke fÃr die Bereitstellung von Codeteilen aus der Arduino IDE

  Weitere Informationen findest du in der README.md-Datei oder auf GitHub.
*/



#include <ArduinoJson.h>
#include <WiFiS3.h>
#include <PubSubClient.h>
#include <Adafruit_DPS310.h>
#include "arduino_secrets.h"

Adafruit_DPS310 dps;
Adafruit_Sensor *dps_temp = dps.getTemperatureSensor();
Adafruit_Sensor *dps_pressure = dps.getPressureSensor();

// Please enter your sensitive data in the Secret tab/arduino_secrets.h
char ssid[] = SECRET_SSID; // Your network SSID (name)
char pass[] = SECRET_PASS; // Your network password (use for WPA, or use as key for WEP)
const char* mqtt_server = "192.168.10.7"; // IP of your MQTT Broker

WiFiClient espClient;
PubSubClient client(espClient);
unsigned long lastMsg = 0;
#define MSG_BUFFER_SIZE (50)
char msg[MSG_BUFFER_SIZE];
int value = 0;

void setup_wifi() {
  delay(100);
  Serial.println();
  Serial.print("Connecting to ");
  Serial.println(ssid);

  WiFi.begin(ssid, pass);

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

  Serial.println("");
  Serial.println("WiFi connected");
  Serial.println("IP address: ");
  Serial.println(WiFi.localIP());
}

void callback(char* topic, byte* payload, unsigned int length) {
  // Handle incoming MQTT messages if needed
}

void reconnect() {
  while (!client.connected()) {
    Serial.print("Attempting MQTT connection...");
    String clientId = "ESP8266Client-";
    clientId += String(random(0xffff), HEX);
    if (client.connect(clientId.c_str())) {
      Serial.println("connected");
      client.publish("outTopic", "Sensor Online!");
      client.subscribe("inTopic");
    } else {
      Serial.print("failed, rc=");
      Serial.print(client.state());
      Serial.println(" try again in 5 seconds");
      delay(5000);
    }
  }
}

void setup() {
  Serial.begin(115200);
  while (!Serial) delay(10);

  Serial.println("DPS310");
  if (! dps.begin_I2C()) {
    Serial.println("Failed to find DPS");
    while (1) yield();
  }
  Serial.println("DPS OK!");

  // Setup highest precision
  dps.configurePressure(DPS310_64HZ, DPS310_64SAMPLES);
  dps.configureTemperature(DPS310_64HZ, DPS310_64SAMPLES);

  setup_wifi();
  client.setServer(mqtt_server, 1883);
  client.setCallback(callback);
}

void loop() {
  if (!client.connected()) {
    reconnect();
  }
  client.loop();
  StaticJsonDocument<32> doc;
  char output[55];

  sensors_event_t temp_event, pressure_event;
  
  if (dps.temperatureAvailable() && dps.pressureAvailable()) {
    dps_temp->getEvent(&temp_event);
    dps_pressure->getEvent(&pressure_event);

    Serial.print(F("Temperature = "));
    Serial.print(temp_event.temperature);
    Serial.println(" *C");
    Serial.print(F("Pressure = "));
    Serial.print(pressure_event.pressure);
    Serial.println(" hPa"); 
    Serial.println();

    doc["temperature"] = temp_event.temperature;
    doc["pressure"] = pressure_event.pressure;

    serializeJson(doc, output);
    client.publish("/home/sensors", output);

    delay(5000);
  }
}