> using the pi-sense indoor in non-condensing conditions. I do not see why suitable to use in any condition is a requirement for having a proper measurement.
But isn't the point of a "weather station" to measure and report weather conditions, which most of them required to be measure outside? It's just because there are probably thousands posts throughout the internet for yet another simple bme280 "weather station", with probably ten times of complaints that the sensor is giving weird readings under common conditions. It's not for "suitable in any condition". The BME280 is not suitable for use in conditions common for considerable periods of the year in locations where more than two thirds of our planets population is located, and that even placed in a protective shell or housing. So if you want to have proper measurements not in any, but in real world conditions, the bme280 is the wrong choice. When conditions outside are below 0°C and above 85% relative humidity, the bme280 gives you readings like -5°C when its -1°C in reality, a minute after the next reading is +2°C and so on. And that in a housing like this: https://imgur.com/a/gR1qLpt I don't want to discourage anyone to experiment, write code or anything. It's just my two cents when it comes to choosing sensor for a home-brew weather station. If you are looking for an alternative: the Sensirion SHT3x humiTemp Sensors are way better, suitable for real world conditions, the same price range, also i2c, but the don't have a pressure sensor built in. So a weather station with an inside unit using the bme280 for barometric pressure, inside temp and inside humidity, an outside unit using a SHT30, SHT31 or SHT35 would even be a next step in the means of taking your hobby coding to the next level. [email protected] schrieb am Dienstag, 9. Februar 2021 um 17:58:26 UTC+1: > No weather station specialist here. Just hobbyist taking this as an > opportunity to write some code, using the pi-sense indoor in non-condensing > conditions. I do not see why suitable to use in any condition is a > requirement for having a proper measurement. > > But I did not care reading the full spec sheets of the LPS22HBTR or the > SHTC3. They seem to provide "good enough" values for my need. > > If anyone can find some use of this the code, it will be available. > > ++ > > On Tuesday, February 9, 2021 at 10:11:46 AM UTC+1 [email protected] > wrote: > >> "bme280" and "Weather Station": this can only be some kind of "proof of >> concept" since the bme280 isn't suitable as a sensor for all conditions: in >> it's datasheet there is clear information that the bme280 is only suitable >> for "non condensing" conditions. In reality the sensor is not working in >> conditions below freezing with a relative humidity of ~80% and more. With >> "not working" I mean the readings are significantly unstable and with >> "jumps" of several degree from one sample to the following. If the bme280 >> is installed in the indoor unit to measure inTemp, inHumidity and pressure, >> that should be OK. >> [email protected] schrieb am Freitag, 5. Februar 2021 um 23:11:44 UTC+1: >> >>> Hi, >>> I developed a small driver for the Build Your Own Weather Station with a >>> Raspberry Pi a while back, it has code to read pressure, temp and humidity >>> from the BM280 sensor in case you want to take a look: >>> https://github.com/jardiamj/BYOWS_RPi/blob/master/byows_rpi.py >>> >>> It's not perfect and unfortunately I don't have the hardware for testing >>> everything but I has worked well for other people. >>> >>> Best regards, >>> >>> Jardi. >>> >>> On Friday, February 5, 2021 at 3:35:44 AM UTC-8 [email protected] wrote: >>> >>>> Hi, >>>> >>>> I got myself a PiSense -Hat for my rapsberry, and cloned the BM280 >>>> extension to do the same kind of job. >>>> ie : >>>> - Read pressure, temp, humidity >>>> >>>> Maybe magento/accelero, but I am not sure it is relevant to weewx and >>>> has storage space in the archive table. >>>> >>>> Is that kind of device of interest for weewx? An I should try to make a >>>> proper extension from it (with setup and all)? >>>> >>>> Regards, >>>> >>>> -- You received this message because you are subscribed to the Google Groups "weewx-development" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/weewx-development/df802fd7-36b0-4a3d-9d35-ce630fc36a41n%40googlegroups.com.
