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BME280 module does not collect dewpoint #511

Closed BrettDikeman closed 5 years ago

BrettDikeman commented 5 years ago

Operating environment/Installation (Hass.io/Docker/pip/etc.):

Not applicable

ESP (ESP32/ESP8266, Board/Sonoff):

Not applicable

Affected component:

BME280 (and BME680)

Description of problem:

The BME sensors with temperature and humidity provide dew point values, but these are not available in the corresponding component.

Problem-relevant YAML-configuration entries:

N/A

Logs (if applicable):

Additional information and things you've tried:

N/A

brandond commented 5 years ago

I don't believe either device actually provides this as a raw measurement. Other firmwares will derive it for you based on temperature and humidity but I imagine @ottowinter will tell you to do this for yourself with a template sensor lambda.

Example: https://github.com/nodemcu/nodemcu-firmware/blob/master/app/modules/bme280.c#L457

BrettDikeman commented 5 years ago

Yep, not a single mention of the word "dew" in the datasheet. Good job, me.

*facepalm*

I guess if anything this would end up being a feature request for the module to provide. Closing...