Wetterstation/include/mess_BMP280.h

#include <SPI.h>
#include <Wire.h>
#include <Adafruit_Sensor.h>
#include <Adafruit_BMP280.h>


#define SEALEVELPRESSURE_HPA (1002.7)  // 1013.25
// Richen 219 m über NN
// Eppingem 195 m über NN

Adafruit_BMP280 bmp; // I2C
float K_BMP280 = -1.30;

bool F_BMP280;

struct {
  char temperature[15] = {0};
  char pressure[15] = {0};
  char approx_altitud[15] = {0};
  char humity[15] = {0};
} BMP280Data;

  

void Init_BMP280(){
  bool status = bmp.begin(0x76); 
  F_BMP280 = true; 
  if (!status) {
    Serial.println("Could not find a valid BME280 sensor, check wiring!");
    F_BMP280 = false;
  } else{
    /* Serial.print("SensorID was: 0x"); Serial.println(bmp.sensorID(),16);
    delay(5000); */
    /* Default settings from datasheet. */
    bmp.setSampling(Adafruit_BMP280::MODE_NORMAL,     /* Operating Mode. */
                    Adafruit_BMP280::SAMPLING_X2,     /* Temp. oversampling */
                    Adafruit_BMP280::SAMPLING_X16,    /* Pressure oversampling */
                    Adafruit_BMP280::FILTER_X16,      /* Filtering. */
                    Adafruit_BMP280::STANDBY_MS_500); /* Standby time. */

    //bmp_temp->printSensorDetails();
    Serial.println("BMP280 gefunden");
  }
}

void read_BMP_280() {

  
    Serial.print("Temperature (BMP280):\t");
    float t = bmp.readTemperature();
    t = t + K_BMP280;
    dtostrf(t,7,1,BMP280Data.temperature);
    Serial.print(BMP280Data.temperature);
    Serial.println(" °C");

    Serial.print("Pressure:\t\t");
    float p = bmp.readPressure() / 100.0F;
    //p = p + 22;
    dtostrf(p,5,0,BMP280Data.pressure);
    Serial.print(BMP280Data.pressure);
    Serial.println(" hPa");

    Serial.print("Approx. Altitude:\t");
    float a = bmp.readAltitude(SEALEVELPRESSURE_HPA);
    dtostrf(a,7,1,BMP280Data.approx_altitud);
    Serial.print(BMP280Data.approx_altitud);
    Serial.println(" m über NN");

    Serial.println();
}
void M2M_BMP280(String deviceId = "4711") {
    char topic[100];
    sprintf(topic, "%s%s%s", "hjk/devices/", deviceId.c_str(), "/telemetry/temperature_BMP_280" );
    client.publish(topic, BMP280Data.temperature, true);
    sprintf(topic, "%s%s%s", "hjk/devices/", deviceId.c_str(), "/telemetry/pressure" );
    client.publish(topic, BMP280Data.pressure, true);
    sprintf(topic, "%s%s%s", "hjk/devices/", deviceId.c_str(), "/telemetry/approx_altitude" );
    client.publish(topic, BMP280Data.approx_altitud);
}