ESP Easy and BME280 data

[johntech2004]

I finally upgraded all my esp8266 boards with the latest ESP Easy software. I'm using the BME280 devices and viewing the LOG option from the TOOLS tab, to view the data from the sensor. I notice it is giving me a Dew Point reading along with the Temp, Humidity, and Pressure. In the Device Setup tab for the sensor, there isn't a "Value box" for the Dew Point. Is that something that can be added?

Thanks

John

[ManS-H]

I finally upgraded all my esp8266 boards with the latest ESP Easy software. I'm using the BME280 devices and viewing the LOG option from the TOOLS tab, to view the data from the sensor. I notice it is giving me a Dew Point reading along with the Temp, Humidity, and Pressure. In the Device Setup tab for the sensor, there isn't a "Value box" for the Dew Point. Is that something that can be added?

Thanks

John

Look here, maybe this is your solution.
viewtopic.php?t=3013

[johntech2004]

Since the sensor is putting out that information already, I didn't know how easy it would be to add that field to the BME280 data information to have it display automatically.

[Ton_vN]

Direct access is better, but if BME280's data on Dew Point cannot be directly accessed, why not use a Dummy Device?
See https://www.letscontrolit.com/wiki/inde ... example.29

[Shardan]

Guys, please read what Threads Opener hast written!

The BME 280 already does all calculations for dew point.
It ist Not necessary to recalculate it.

Question is if ESPEasy is able oder can be enabled to use a
fourth value in the Task.

[Donnie]

Actually I am also interested in getting the dew point information from the BME280 and then want to send it over MQTT.

Is there a way to get that value from the sensor directly?

[kimot]

Guys, please read what datasheets has written!

https://ae-bst.resource.bosch.com/media ... -DS002.pdf

I'm curious, if anyone finds a registry number where the dew point can be read at BME280.
Or that it was not there?

At "BME280 plugin" dew point is calculated by plugin itself and then logged:

Code: Select all

if (sensor.hasHumidity()) {
    if (loglevelActiveFor(LOG_LEVEL_INFO)) {
      log += F(" dew point ");
      log += sensor.last_dew_temp_val;
      log += F("C");
      logAdded = true;
}

calculated here:

Code: Select all

sensor.last_dew_temp_val = compute_dew_point_temp(sensor.last_temp_val + (tempOffset / 2.0), sensor.last_hum_val);

Code: Select all

float compute_dew_point_temp(float temperature, float humidity_percentage) {
  return pow(humidity_percentage / 100.0, 0.125) *
(112.0 + 0.9*temperature) + 0.1*temperature - 112.0;