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weewx / weewx-wmr200

Unsupported driver for the Oregon Scientific WMR200
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WMR200

This is a driver for the Oregon Scientific WMR200 weather station for the WeeWX weather system. It was originally part of the main WeeWX distribution, but was split off in December 2020 because of continuing support problems. In particular, it is known to get occasional "Resource busy" errors. See WeeWX issue #578.

The driver is unsupported

WeeWX V4 and Python 3.x compatible.

Installation

  1. Install WeeWX, selecting 'Simulator' driver. See directions at http://weewx.com/docs/usersguide.htm#installing

  2. Download the wmr200 driver

    wget -O weewx-wmr200.zip https://github.com/weewx/weewx-wmr200/archive/main.zip

  3. Install the driver

    sudo wee_extension --install=weewx-wmr200.zip

  4. Configure the driver

    sudo wee_config --reconfigure --driver=user.wmr200 --no-prompt

  5. Start WeeWX

    sudo /etc/init.d/weewx start

Options

This section is for options relating to the Oregon Scientific WMR200 series of weather stations with USB connectors.

[WMR200]

model

Set to the station model. For example, WMR200 or WMR200A.

use_pc_time

If True, use the computer time, otherwise use the station time. Default is True.

archive_interval

Set the wmr200 archive interval in seconds. Default is 60 seconds.

The wmr200 hardware records archive data at an immutable rate of 60 seconds. This field may be set to a higher value enabling the WeeWX engine to coalesce live data packets. However, when the wmr200 is not connected to a system via USB or if the WeeWX software is not running, the wmr200 console will continue to store weather data in onboard console memory at a fixed rate of 60 seconds.

erase_archive

If True, erase onboard console memory archive when starting up. Default is False.

archive_startup

When retrieving archive data packets from the wmr200 onboard console memory, there is no explicit indication that all the data has been drained. This field specifies when to transition from archive mode to live mode. This transition occurs when no archive packets are detected within this time interval. Default is 120 seconds.

archive_threshold

Occasionally when retrieving archive packets from the wmr200 onboard memory a stale data packet will be detected. The archive packets are presented in sequential order typically timestamped 60 seconds apart. However, there is no guarantee the archive packets are exactly 60 seconds apart. Should an incoming archive data packet timestamp exceed the previous archive data packet one by the amount in this field it will be dropped. Default is 1512000 seconds (1 week).

sensor_status

If True, emit sensor faults and failures to log. Default is True.

[[sensor_map]]

This section defines the mapping between observations from remote sensors and the fields in the database.

For example, this would associate extraTemp1 with the remote T/H sensor on channel 5:

[[sensor_map]]
extraTemp1 = temperature_5

See below for a complete listing of sensor names, and the default database fields for each sensor.

WMR200 station data

The following table shows which data are provided by the station hardware and which are calculated by WeeWX.

Database Field Observation Loop Archive
barometer S S
pressure pressure H H
altimeter altimeter H H
inTemp temperature_0 H H
outTemp temperature_1 H H
inHumidity humidity_0 H H
outHumidity humidity_1 H H
windSpeed wind_speed H H
windDir wind_dir H H
windGust wind_gust H H
rain rain D D
rain_total H H
rainRate rain_rate H H
dewpoint S S
windchill windchill H H
heatindex heatindex H H
UV uv H H
extraTemp1 temperature_2 H H
extraTemp2 temperature_3 H H
extraTemp3 temperature_4 H H
extraTemp4 temperature_5 H H
extraTemp5 temperature_6 H H
extraTemp6 temperature_7 H H
extraTemp7 temperature_8 H H
extraHumid1 humidity_2 H H
extraHumid2 humidity_3 H H
extraHumid3 humidity_4 H H
extraHumid4 humidity_5 H H
extraHumid5 humidity_6 H H
extraHumid6 humidity_7 H H
extraHumid7 humidity_8 H H
outTempBatteryStatus battery_status_out H
rainBatteryStatus rain_battery_status H
windBatteryStatus wind_battery_status H
uvBatteryStatus uv_battery_status H

Each packet contains a subset of all possible readings. For example, a temperature packet contains temperature_N and battery_status_N, a rain packet contains rain_total and rain_rate.

Copyright (c) 2013 Chris Manton cmanton@gmail.com www.onesockoff.org