Pressure Readings with BME280

[wxwatching]

I followed the installation guide here:

I ran a test script like this:

import Adafruit_BME280

sensor = Adafruit_BME280.BME280(t_mode=Adafruit_BME280.BME280_OSAMPLE_8, p_mode=Adafruit_BME280.BME280_OSAMPLE_8, h_mode=Adafruit_BME280.BME280_OSAMPLE_8)

degrees = sensor.read_temperature()

pascals = sensor.read_pressure()

print (degrees)

print (pascals)

The output of that is:

25.034087635501418

99871.16464771295

However, when I try to get Weewx to read the data from the BME280, the output of the syslog on a restart never gets past these lines:

Sep 29 22:55:45 raspberrypi systemd[1]: Starting LSB: weewx weather system...

Sep 29 22:55:45 raspberrypi weewx[9610] INFO __main__: Initializing weewx version 4.1.1

Sep 29 22:55:45 raspberrypi weewx[9610] INFO __main__: Using Python 3.7.3 (default, Jul 25 2020, 13:03:44) #012[GCC 8.3.0]

Sep 29 22:55:45 raspberrypi weewx[9610] INFO __main__: Platform Linux-5.4.51-v7+-armv7l-with-debian-10.4

Sep 29 22:55:45 raspberrypi weewx[9610] INFO __main__: Locale is 'en_US.UTF-8'

Sep 29 22:55:45 raspberrypi weewx[9610] INFO __main__: PID file is /var/run/weewx.pid

Sep 29 22:55:45 raspberrypi weewx[9598]: Starting weewx weather system: weewx.

Sep 29 22:55:45 raspberrypi systemd[1]: Started LSB: weewx weather system.

In my weewx.conf, these added lines do not seem to work.

[BME280]

    col_pres = pressure

    col_temp = ''

    sl_denominator = 0.99715048109  # https://www.raspberrypi.org/forums/viewtopic.php?t=154262

    BME280_lib_location = '/home/pi/Adafruit_Python_BME280'

[Engine]

    [[Services]]

        # This section specifies the services that should be run. They are

        # grouped by type, and the order of services within each group

        # determines the order in which the services will be run.

        prep_services = weewx.engine.StdTimeSynch

        data_services = ,

        process_services = weewx.engine.StdConvert, weewx.engine.StdCalibrate, weewx.engine.StdQC, weewx.wxservices.StdWXCalculate, user.weather34.Weather34RealTime

        archive_services = weewx.engine.StdArchive

        restful_services = weewx.restx.StdStationRegistry, weewx.restx.StdWunderground, weewx.restx.StdPWSweather, weewx.restx.StdCWOP, weewx.restx.StdWOW, weewx.restx.StdAWEKAS

        report_services = weewx.engine.StdPrint, weewx.engine.StdReport

        # following line is the BME280 pressure sensor

        data_services = user.bme280.bme

 I have to comment out  the BME section and the data_services line in the Engine section in order to get Weewx to work properly again.

Any ideas on my problem?

[wxwatching]

The guide I followed was:

https://github.com/bdwilson/acurite/blob/master/Pressure.md

[rich T]

I don't have any issues when using this driver for my BME280 sensor. 

https://gitlab.com/wjcarpenter/bme280wx

[Glenn McKechnie]

Have you got debug turned on in weewx.conf (debug = 1)? Probably
should be for this.

In bme280.py it has the following...
[...]
# Inherit from the base class StdService:
class bmp(StdService):
[...]

You are calling...
user.bme280.bme

I believe that should be ...
user.bme280.bmp

also , I don't think you can have 2 entries for data_services . In
this case comment out the original one.

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--


Cheers
Glenn

rorpi - read only raspberry pi & various weewx addons
https://github.com/glennmckechnie