2025-12-1205

include/mess_bme280.h

@@ -0,0 +1,69 @@
+#include <Adafruit_Sensor.h>
+#include <Adafruit_BME280.h>
+
+
+#define SEALEVELPRESSURE_HPA (1013.25)
+
+Adafruit_BME280 bme; // I2C
+
+struct {
+  char temperature[15] = {0};
+  char pressure[15] = {0};
+  char approx_altitud[15] = {0};
+  char humity[15] = {0};
+} BME280Data;
+
+  
+
+void Init_BME280(){
+    bool status = bme.begin();  
+    if (!status) {
+      Serial.println("Could not find a valid BME280 sensor, check wiring!");
+    while (1);
+  }
+}
+
+void read_BME_280() {
+
+  
+    Serial.print("Temperature:\t\t");
+    float t = bme.readTemperature();
+    dtostrf(t,10,4,BME280Data.temperature);
+    Serial.print(BME280Data.temperature);
+    Serial.println(" °C");
+    //Serial.print("Diff zu DS1820 \t\t");Serial.print(t-valTemp,4); Serial.println(" °C"); 
+
+    Serial.print("Humidity:\t\t");
+    float h = bme.readHumidity();
+    dtostrf(h,8,2,BME280Data.humity);
+    Serial.print(BME280Data.humity);
+    Serial.println(" %");
+
+    Serial.print("Pressure:\t\t");
+    float p = bme.readPressure() / 100.0F;
+    p = p + 22;
+    dtostrf(p,5,0,BME280Data.pressure);
+    Serial.print(BME280Data.pressure);
+    Serial.println(" hPa");
+
+    Serial.print("Approx. Altitude:\t");
+    float a = bme.readAltitude(SEALEVELPRESSURE_HPA);
+    dtostrf(a,5,0,BME280Data.approx_altitud);
+    Serial.print(BME280Data.approx_altitud);
+    Serial.println(" m über NN");
+
+    Serial.println();
+}
+void M2M_BME280(long deviceId = 4711) {
+    char topic[100];
+    sprintf(topic, "%s%ld%s", "hjk/devices/", deviceId, "/telemetry/temperature_BME_280" );
+    client.publish(topic, BME280Data.temperature, true);
+    sprintf(topic, "%s%ld%s", "hjk/devices/", deviceId, "/telemetry/pressure" );
+    client.publish(topic, BME280Data.pressure, true);
+    sprintf(topic, "%s%ld%s", "hjk/devices/", deviceId, "/telemetry/humity" );
+    client.publish(topic, BME280Data.humity, true);
+    sprintf(topic, "%s%ld%s", "hjk/devices/", deviceId, "/telemetry/approx_altitude" );
+    client.publish(topic, BME280Data.approx_altitud);
+    //
+    //delay(500);
+}