WS23xx

La Crosse WS-2315-11 and others

.NET 2.0 Managed Weather Station Communications Library

Licensed Free Software

(See the included GNU GPL for more information)

Release 2.0 – January 2006

Written & Maintained By:

Shell M. Shrader

(Owner/Proprietor of shellware.com)

Table of Contents

Public Enumerations. 5

BAUD_RATE.. 5

COMM_PORT. 5

START_BITS.. 5

STOP_BITS.. 6

WEATHER_ALARMS_STATE & WEATHER_ALARMS_STATUS.. 6

WEATHER_COMMAND.. 7

WEATHER_CONNECTION_TYPE.. 7

WEATHER_RESULT_STATUS.. 8

WEATHER_VALUES_TO_CLEAR.. 8

Public Structures (typically used for return values) 9

WEATHER_ALARMS.. 9

WEATHER_BAROMETER.. 10

WEATHER_HUMIDITY. 11

WEATHER_RAINFALL. 12

WEATHER_STATION_STATUS.. 13

WEATHER_TEMPERATURE.. 14

WEATHER_WIND.. 15

WeatherConnector Class. 16

Constructors. 16

WeatherConnector Properties. 17

WeatherConnector.BaudRate. 17

WeatherConnector.CommPort 17

WeatherConnector.Parity. 17

WeatherConnector.StartBits. 17

WeatherConnector.StopBits. 18

WeatherConnector.WeatherAudibleAlarmActive. 18

WeatherConnector.WeatherAlarmsStatusAndState. 18

WeatherConnector.WeatherBarometer 18

WeatherConnector.WeatherDateTime. 18

WeatherConnector.WeatherDewPoint 19

WeatherConnector.WeatherForecast 19

WeatherConnector.WeatherInsideHumidity. 19

WeatherConnector.WeatherInsideTemperature. 19

WeatherConnector.WeatherOutsideHumidity. 19

WeatherConnector.WeatherOutsideTemperature. 19

WeatherConnector.WeatherRainfall 20

WeatherConnector.WeatherStationStatus. 20

WeatherConnector.WeatherTime. 20

WeatherConnector.WeatherWindChill 20

WeatherConnector.WeatherWindspeedAndDirection. 20

Table of Contents - Continued

WeatherConnector Operations. 21

WeatherConnector.ClearDewPointMinMax() 21

WeatherConnector.ClearInsideTempMinMax() 21

WeatherConnector.ClearOutsideTempMinMax() 21

WeatherConnector.ClearWindChillMinMax() 21

WeatherConnector.WeatherCommand() 22

Engineering Notes. 23

com.shellware.weather.ws23xx Namespace. 23

Alarm Status, State, and Bitwise Evaluations. 23

Unable to communicate with the Weather Station Exception. 23

Why is there a WEATHER_RESULT_STATUS enumeration?. 24

Time is offset to the Eastern Time zone. 24

Time Alarm probably doesn’t work. 24

GNU GENERAL PUBLIC LICENSE.. 25

Public Enumerations

BAUD_RATE

Used with the WeatherConnector.BaudRate property to specify or retrieve the desired Baud rate to communicate with the weather station.

COMM_PORT

Used as an optional argument with the WeatherConnector class constructor or with the WeatherConnector.CommPort property to specify or retrieve the desired Serial Communications port to connect to.

START_BITS

Used with the WeatherConnector.StartBits property to specify or retrieve the number of Start Bits to use when communicating with the weather station.

STOP_BITS

Used with the WeatherConnector.StopBits property to specify or retrieve the number of Stop Bits to use when communicating with the weather station.

WEATHER_ALARMS_STATE & WEATHER_ALARMS_STATUS

These two enumerations are used in conjunction with the WeatherAlarmsStatusAndState property as members of the WEATHER_ALARMS structure for determining whether a specific Alarm is defined and/or active.

Their usage is based on bitwise evaluations.

WEATHER_COMMAND

The WEATHER_COMMAND enumeration is used internally for performing all underlying operations with the weather station.  It can be used with the WeatherCommand() operation if you wish to bypass the exposed properties and work with the “raw” results returned by the weather station.

WEATHER_CONNECTION_TYPE

A member of the WEATHER_STATION_STATUS structure that is returned by the WeatherStationStatus property.  It is used for determining what communications link is being utilized between the weather station base and its remote transmitter.

WEATHER_RESULT_STATUS

A member of all return value structures that is used to determine whether or not that command was successful.  Currently this enumeration value is only valid for the Wind Chill and Wind speed & direction properties.

WEATHER_VALUES_TO_CLEAR

Passed as an argument to the WeatherConnector class Clear* operations.  It specifies which stored weather values are to be cleared.

Public Structures (typically used for return values)

WEATHER_ALARMS

The WEATHER_ALARMS structure is the return value for the WeatherAlarmsStateAndStatus property.  Each member is either a WEATHER_ALARM_STATUS or WEATHER_ALARM_STATE enumeration for each specific alarm.

The values are interrogated by use of a bitwise evaluation.

WEATHER_BAROMETER

The WEATHER_BAROMETER structure is the return value for the WeatherBarometer property.

The BarometerResultsStatus enumeration is unused.

CurrentBarometricPressure

Single Precision FP Number representing the current Barometric Pressure reading in inHg.

CurrentBarometricTendency

String (“Rising”, “Falling”, “Steady”)

BarometerResultsStatus

Unused

WEATHER_HUMIDITY

The WEATHER_HUMIDITY structure is the return value for the WeatherInsideHumidity and WeatherOutsideHumidity properties.

The HumidityResultStatus enumeration is unused.

CurrentHumidity

Short Integer representing the Current Humidity in percent.

CurrentTimestamp

Date representing when the Current Humidity was set.

MaximumHumidity

Short Integer representing the highest Humidity recorded.

MaximumTimestamp

Date representing when the MaximumHumidity value was set

MinimumHumidity

Short Integer representing the lowest Humidity recorded.

MinimumTimestamp

Date representing when the MinimumHumidity value was set.

HumidityResultStatus

Unused

WEATHER_RAINFALL

The WEATHER_RAINFALL structure is the return value for the WeatherRainfall property.

The RainfallResultStatus enumeration is unused.

RainfallLastHour

Double Precision FP number representing how much rain has fallen in the past 60 minutes measured in inches.

MaximumRainfallForOneHour

Double Precision FP number representing the maximum hourly rainfall recorded.

MaximumRainfallForOneHour Timestamp

Date representing when the MaximumRainfallForOneHour value was recorded.

RainfallLast24Hours

Double Precision FP number representing how much rain has fallen in the past 24 hours measured in inches.

MaximumRainfallFor24Hours

Double Precision FP number representing the maximum daily rainfall recorded.

TotalRainfall

Double Precision FP number representing the total amount of rainfall recorded since the last time the station was reset measure in inches.

TotalRainfallSinceTimestamp

Date representing the last time the station was reset.

RainfallResultStatus

Unused

WEATHER_STATION_STATUS

The WEATHER_STATION_STATUS structure is the return value for the WeatherStationStatus property.

The StationResultStatus enumeration is unused.

SecondsTillNextDataset

A Short Integer representing an estimate provided by the weather station of when it will be receiving its next dataset from its remote transmitter.  I strongly stress estimate.

TransmitterToStationConnectionType

See the WEATHER_CONNECTION_TYPE

Enumeration for more information.

StationResultStatus

Unused

WEATHER_TEMPERATURE

The WEATHER_TEMPERATURE structure is the return value for the WeatherInsideTemperature, WeatherOutsideTemperature, WeatherDewPoint, and WeatherWindChill properties.

The TemperatureResultStatus enumeration is unused except for with the WeatherWindChill property.

CurrentTemperature

Single Precision FP number representing the current recorded temperature in Fahrenheit.

CurrentTimestamp

Date representing when the CurrentTemperature value was set.

MaximumTemperature

Single Precision FP number representing the maximum temperature recorded in Fahrenheit.

MaximumTimestamp

Date representing when the MaximumTemperature value was set

MinimumTemperature

Single Precision FP number representing the minimum temperature recorded in Fahrenheit.

MinimumTimestamp

Date representing when the MinimumTemperature value was set.

TemperatureResultStatus

Unused except for with the WeatherWindChill property.

WEATHER_WIND

The WEATHER_WIND structure is the return value for the WeatherWindspeedAndDirection property.

CurrentWindspeed

Single Precision FP number representing the current Wind speed in miles per hour.

CurrentWindDirection

Single Precision FP number representing the current recorded wind direction in degrees.

DirectionHistory1

DirectionHistory2

DirectionHistory3

DirectionHistory4

DirectionHistory5

Single Precision FP number representing the last 5 recorded wind directions in degrees.

WindResultStatus

Used to determine if the WeatherWindspeedAndDirection property values are valid.

WeatherConnector Class

The WeatherConnector class is the heart of WS23xx.  All core operations and properties are exercised from this object.

Constructors

Default Constructor

Dim oWeather As WeatherConnector = New WeatherConnector()

The default constructor should work fine for most implementations of the ws23xx library.  By default ws23xx assigns COM1 as the communications port with baud/parity/start/stop settings of 2400/N/8/1.

At the time of this writing the La Crosse weather stations that the library has been tested with only work with baud/parity/start/stop settings of 2400/N/8/1.

Overloaded Constructor

A single overloaded Constructor has been provided for those wishing to explicitly set the desired Communications port at object instantiation time.

This Constructor is useful for those using a Communications Port other than COM1.

The selected Communications Port can be set at any time after instantiation by use of the WeatherConnector.CommPort property.

If an attempt is made to execute one of the various WeatherConnector properties or operations using an invalid Communications port, a general Exception with the message “Unable to communicate with the Weather Station” is thrown.  The inner exception shows the actual operation which was attempted.

Please note that this constructor does not exercise any properties or operations.  It merely provides an easy way to override the default CommPort property value.

WeatherConnector Properties

WeatherConnector.BaudRate

Allows you to set or retrieve the Baud Rate used for communicating with the Weather Station.

Defaults to 2400.

See the BAUD_RATE enumeration for more information.

WeatherConnector.CommPort

Allows you to set or retrieve the Communications Port used for communicating with the Weather Station.

Defaults to COM1.

See the COMM_PORT enumeration for more information.

WeatherConnector.Parity

Allows you to set or retrieve the RS232 Parity used for communicating with the Weather Station.

Defaults to False.

Boolean based.  Can only be True or False

WeatherConnector.StartBits

Allows you to set or retrieve the RS232 Start Bits used for communicating with the Weather Station

Defaults to 8.

See the START_BITS enumeration for more information.

WeatherConnector.StopBits

Allows you to set or retrieve the RS232 Stop Bits used for communicating with the Weather Station.

Defaults to 1.

See the STOP_BITS enumeration for more information.

WeatherConnector.WeatherAudibleAlarmActive

Read-Only property that indicates whether the station has an unacknowledged Audible alarm active.

Boolean Based.

An audible alarm is active if the text ALARM is displayed on the station console.

WeatherConnector.WeatherAlarmsStatusAndState

Read-Only property that returns a WEATHER_ALARMS structure used for determining if any alarms are defined and/or active.

The Status enumerations are used for determining if an alarm is defined.

The State enumerations are used for determining if an alarm is active.

See the Engineering Notes section for more information on Alarm status and state.

WeatherConnector.WeatherBarometer

Read-Only property that returns a WEATHER_BAROMETER structure used for determining the current barometric pressure and tendency.

See the WEATHER_BAROMETER structure for more information.

WeatherConnector.WeatherDateTime

Read-Only property that returns a Date and Time filled Date value used for determining when the last Dataset was processed by the Weather Station.

WeatherConnector.WeatherDewPoint

Read-Only property that returns a WEATHER_TEMPERATURE structure used for determining the current, minimum, and maximum Dew Point values.

See the WEATHER_TEMPERATURE structure for more information.

WeatherConnector.WeatherForecast

Read-Only property that returns a String that represents the current forecast.

Valid Forecast return values are:

Rain

Overcast

Clear

WeatherConnector.WeatherInsideHumidity

Read-Only property that returns a WEATHER_HUMIDITY structure used for determining the current, minimum, and maximum Inside Humidity values.

See the WEATHER_HUMIDITY structure for more information.

WeatherConnector.WeatherInsideTemperature

Read-Only property that returns a WEATHER_TEMPERATURE structure used for determining the current, minimum, and maximum Inside Temperature values.

See the WEATHER_TEMPERATURE structure for more information.

WeatherConnector.WeatherOutsideHumidity

Read-Only property that returns a WEATHER_HUMIDITY structure used for determining the current, minimum, and maximum Outside Humidity values.

See the WEATHER_HUMIDITY structure for more information.

WeatherConnector.WeatherOutsideTemperature

Read-Only property that returns a WEATHER_TEMPERATURE structure used for determining the current, minimum, and maximum Outside Temperature values.

See the WEATHER_TEMPERATURE structure for more information.

WeatherConnector.WeatherRainfall

Read-Only property that returns a WEATHER_RAINFALL structure used for determining the current hourly, daily, and total rainfall values.

See the WEATHER_RAINFALL structure for more information.

WeatherConnector.WeatherStationStatus

Read-Only property that returns a WEATHER_STATION_STATUS structure used for determining the status of the weather station.

See the WEATHER_STATION_STATUS structure for more information.

WeatherConnector.WeatherTime

Read-Only property that returns a Timestamp only Date value indicating when the last Dataset was received.

WeatherConnector.WeatherWindChill

Read-Only property that returns a WEATHER_TEMPERATURE structure used for determining the current, minimum, and maximum Wind Chill Temperature values.

Use the TemperatureResultStatus enumeration to determine if the returned Wind chill data is valid.

See the WEATHER_TEMPERATURE structure for more information.

WeatherConnector.WeatherWindspeedAndDirection

Read-Only property that returns a WEATHER_WIND structure used for determining the current wind speed and direction, and last 5 record wind direction values.

Use the WindResultStatus enumeration to determine if the returned Wind speed and direction data is valid.

See the WEATHER_WIND structure for more information.

WeatherConnector Operations

WeatherConnector.ClearDewPointMinMax()

Allows you to clear the Minimum, Maximum, or both recorded values for Dew Point.

Accepts a single optional argument of type WEATHER_VALUES_TO_CLEAR.

Defaults to WEATHER_VALUES_TO_CLEAR.WEATHER_TYPE_MIN_AND_MAX

WeatherConnector.ClearInsideTempMinMax()

Allows you to clear the Minimum, Maximum, or both recorded values for the Inside Temperature.

Accepts a single optional argument of type WEATHER_VALUES_TO_CLEAR.

Defaults to WEATHER_VALUES_TO_CLEAR.WEATHER_TYPE_MIN_AND_MAX

WeatherConnector.ClearOutsideTempMinMax()

Allows you to clear the Minimum, Maximum, or both recorded values for the Outside Temperature.

Accepts a single optional argument of type WEATHER_VALUES_TO_CLEAR.

Defaults to WEATHER_VALUES_TO_CLEAR.WEATHER_TYPE_MIN_AND_MAX

WeatherConnector.ClearWindChillMinMax()

Allows you to clear the Minimum, Maximum, or both recorded values for Wind Chill.

Accepts a single optional argument of type WEATHER_VALUES_TO_CLEAR.

Defaults to WEATHER_VALUES_TO_CLEAR.WEATHER_TYPE_MIN_AND_MAX

WeatherConnector.WeatherCommand()

Allows you to bypass any editing and formatting done by the managed Weather properties and work with a String Array of returned values for the specified WEATHER_COMMAND.

It is recommended that you review the individual WEATHER_COMMAND Case that is executed inside of WeatherCommand() to learn of its format.

This operation is considered unsupported.

Engineering Notes

com.shellware.weather.ws23xx Namespace

This is the package name.  If you wish to import ws23xx, this is the best place to do it.

Alarm Status, State, and Bitwise Evaluations

When working with the WeatherAlarmsStatusAndState property you need to rely on bitwise evaluations to determine whether or not an alarm is defined and/or active.

To check if the General Weather Advisory alarm is defined:

Dim WeatherAlarms As WEATHER_ALARMS = _

oWeather.WeatherAlarmsStatusAndState

‘ this stuff is all bitwise based

If (WeatherAlarms.WeatherAdvisoryAlarmStatus And _

WEATHER_ALARMS_STATUS.ALARM_WEATHER_ADVISORY) > 0 Then

UpdateAdvisoryAlarm(Color.Green)

Else

UpdateAdvisoryAlarm(Color.Gray)

End If

To check if the General Weather Advisory alarm is active:

If (WeatherAlarms.WeatherAdvisoryAlarmState And _

WEATHER_ALARMS_STATE.ALARM_WEATHER_ADVISORY) > 0 Then _

UpdateAdvisoryAlarm(Color.Red)

The syntax and semantics for the remaining alarms is done in the exact same manner as illustrated for the General Weather Advisory Alarm.

Unable to communicate with the Weather Station Exception

From time to time the weather station will simply refuse to communicate with ws23xx.  This happens very rarely but needs to be taken into account when writing code that uses ws23xx.  You should always include WeatherConnector calls within Try/Catch blocks.

Why is there a WEATHER_RESULT_STATUS enumeration?

And more importantly why isn’t it used all the time?

The answer is simple once put into context.  I needed a way to trap conditions such as invalid wind and wind chill results without having to throw an Exception.

I facilitated this by use of the WEATHER_RESULT_STATUS enumeration being embedded in all the return structures.

At this time you will only ever have valid result status data for Wind Chill and Wind speed / Direction calls.

It is okay to ignore this enumeration for all other WeatherConnector properties.

Time is offset to the Eastern Time zone.

I’ve yet to get around to building in any kind of localization.  Since I’m in the Eastern Time zone, that’s the offset ya get until I get around to building some localization code.  From what I remember this only impacts the WeatherTime property as the WeatherDateTime command reads the date/time displayed on the console, which is subject to whatever time zone offset you have set.

Time Alarm probably doesn’t work.

I never got around to testing the Time Alarm.  It probably needs an additional bitwise evaluator built for it.  Consider this function untested.

GNU GENERAL PUBLIC LICENSE

Version 1, February 1989

Copyright (C) 1989 Free Software Foundation, Inc.

675 Mass Ave, Cambridge, MA 02139, USA

Everyone is permitted to copy and distribute verbatim copies

of this license document, but changing it is not allowed.

Preamble

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To protect your rights, we need to make restrictions that forbid

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For example, if you distribute copies of a such a program, whether

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We protect your rights with two steps: (1) copyright the software, and

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TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION

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Appendix: How to Apply These Terms to Your New Programs

If you develop a new program, and you want it to be of the greatest

possible use to humanity, the best way to achieve this is to make it

free software which everyone can redistribute and change under these

terms.

To do so, attach the following notices to the program.  It is safest to

attach them to the start of each source file to most effectively convey

the exclusion of warranty; and each file should have at least the

"copyright" line and a pointer to where the full notice is found.

<one line to give the program's name and a brief idea of what it does.>

Copyright (C) 19yy  <name of author>

This program is free software; you can redistribute it and/or modify

it under the terms of the GNU General Public License as published by

the Free Software Foundation; either version 1, or (at your option)

any later version.

This program is distributed in the hope that it will be useful,

but WITHOUT ANY WARRANTY; without even the implied warranty of

MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

GNU General Public License for more details.

You should have received a copy of the GNU General Public License

along with this program; if not, write to the Free Software

Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

Also add information on how to contact you by electronic and paper mail.

If the program is interactive, make it output a short notice like this

when it starts in an interactive mode:

Gnomovision version 69, Copyright (C) 19xx name of author

Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.

This is free software, and you are welcome to redistribute it

under certain conditions; type `show c' for details.

The hypothetical commands `show w' and `show c' should show the

appropriate parts of the General Public License.  Of course, the

commands you use may be called something other than `show w' and `show

c'; they could even be mouse-clicks or menu items--whatever suits your

program.

You should also get your employer (if you work as a programmer) or your

school, if any, to sign a "copyright disclaimer" for the program, if

necessary.  Here a sample; alter the names:

Yoyodyne, Inc., hereby disclaims all copyright interest in the

program `Gnomovision' (a program to direct compilers to make passes

at assemblers) written by James Hacker.

<signature of Ty Coon>, 1 April 1989

Ty Coon, President of Vice

That's all there is to it!