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.

• H indicates data provided by Hardware
• D indicates data calculated by the Driver
• S indicates data calculated by the StdWXCalculate Service

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