openHAB

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# Meteostick Binding

This is the binding for the Meteostick (opens new window) weather receiver dongle. This is an RF receiver that can receive data directly from Davis weather devices (and others).

# Supported Things

This binding support 2 different things types

Thing Type Description
meteostick_bridge Bridge This is the Meteostick USB stick
meteostick_davis_iss Thing This is the Davis Vue ISS

# Binding Configuration

The Meteostick things need to be manually added - there is no discovery in the Meteostick binding.

First add and configure the Meteostick bridge - the port and frequency band for your region need to be set. Next add the sensor and configure the channel number.

# Thing Configuration

# meteostick_bridge Configuration Options

Option Description
port Sets the serial port to be used for the stick
mode Sets the mode (frequency band)

Set mode to one of the following depending on your device and region:

Mode Device Region Frequency
0 Davis North America 915 Mhz
1 Davis Europe 868 Mhz
2 Davis Australia 915 Mhz
3 Fine Offset North America 915 Mhz
4 Fine Offset Europe 868 Mhz
5 Davis New Zealand 931.5 Mhz

# meteostick_davis_iss Configuration Options

Option Description
channel Sets the RF channel used for this sensor
spoon Size of rain spoon assembly for this sensor in mm. Default value is 0.254 (0.01") for use with Davis part number 7345.280. Set to 0.2 for use with Davis part number 7345.319

# Channels

# Meteostick

Channel Type ID Item Type Description
pressure Number:Pressure Air pressure
indoor-temperature Number:Temperature Indoor temperature

# Davis ISS

Channel Type ID Item Type Description
outdoor-temperature Number:Temperature Outside temperature
humidity Number Humidity
wind-direction Number:Angle Wind direction
wind-direction-last2min-average Number:Angle Wind direction average over last 2 minutes
wind-speed Number:Speed Wind speed
wind-speed-last2min-average Number:Speed Wind speed average over last 2 minutes
wind-speed-last2min-maximum Number:Speed Wind speed maximum over last 2 minutes
rain-raw Number Raw rain counter from the tipping spoon sensor
rain-currenthour Number:Length The rainfall in the last 60 minutes
rain-lasthour Number:Length The rainfall in the previous hour
solar-power Number Solar power from the sensor station
signal-strength Number Received signal strength
low-battery Switch Low battery warning

# Rainfall

There are three channels associated with rainfall. The raw counter from the tipping bucket is provided, the rainfall in the last 60 minutes is updated on each received rainfall and provides the past 60 minutes of rainfall. The rainfall in the previous hour is the rainfall for each hour of the day and is updated on the hour.

# Full Example

This example uploads weather data to for your personal weather station at Weather Underground every two minutes.

Steps:

  1. Install the MeteoStick (opens new window) binding for use with your Davis Vantage Vue Integrated Sensor Suite (ISS) (opens new window).
  2. Register (opens new window) your personal weather station with Weather Underground and make note of the station ID and password issued.
  3. Add the following files to your openHAB configuration:

# things/meteostick.things

Things can be defined in the .things file as follows:

meteostick:meteostick_bridge:receiver [ port="/dev/tty.usbserial-AI02XA60", mode=1 ]
meteostick:meteostick_davis_iss:iss (meteostick:meteostick_bridge:receiver) [ channel=1, spoon=0.2 ]

Note the configuration options for port, mode, channel and spoon above and adjust as needed for your specific hardware.

# items/meteostick.items

Number:Pressure MeteoStickPressure "Meteostick Pressure [%.1f hPa]"{ channel="meteostick:meteostick_bridge:receiver:pressure" }
Number:Temperature DavisVantageVueOutdoorTemperature "ISS Outdoor Temp [%.1f °C]" { channel="meteostick:meteostick_davis_iss:iss:outdoor-temperature" }
Number DavisVantageVueHumidity "ISS Humidity [%.0f %%]" { channel="meteostick:meteostick_davis_iss:iss:humidity" }
Number:Angle DavisVantageVueWindDirection "ISS Wind Direction [%.0f °]" { channel="meteostick:meteostick_davis_iss:iss:wind-direction" }
Number:Angle DavisVantageVueWindDirectionAverage "ISS Average Wind Direction [%.0f °]" { channel="meteostick:meteostick_davis_iss:iss:wind-direction-last2min-average" }
Number:Speed DavisVantageVueWindSpeed "ISS Wind Speed [%.1f m/s]" { channel="meteostick:meteostick_davis_iss:iss:wind-speed" }
Number:Speed DavisVantageVueWindSpeedAverage "ISS Average Wind Speed [%.1f m/s]" { channel="meteostick:meteostick_davis_iss:iss:wind-speed-last2min-average" }
Number:Speed DavisVantageVueWindSpeedMaximum "ISS Maximum Wind Speed [%.1f m/s]" { channel="meteostick:meteostick_davis_iss:iss:wind-speed-last2min-maximum" }
Number:Length DavisVantageVueRainCurrentHour "ISS Rain Current Hour [%.1f mm]" { channel="meteostick:meteostick_davis_iss:iss:rain-currenthour" }

# rules/meteostick.rules

Replace YOUR_ID and your_password below with the values from the the Weather Underground registration process.

import java.net.URLEncoder
import java.text.SimpleDateFormat
import java.util.Date
import java.util.Map
import java.util.TimeZone

/* Uploads weather station data using the format documented here:

   https://feedback.weather.com/customer/en/portal/articles/2924682-pws-upload-protocol?b_id=17298
 */

rule PWS
when
	Item DavisVantageVueWindDirectionAverage received update
then
	val id = 'YOUR_ID'
	val pw = 'your_password'
	val sdf = new SimpleDateFormat('yyyy-MM-dd HH:mm:ss')
	sdf.setTimeZone(TimeZone.getTimeZone('UTC'))
	val double rh = DavisVantageVueHumidity.getStateAs(DecimalType).doubleValue
	val double tempc = DavisVantageVueOutdoorTemperature.getStateAs(QuantityType).toUnit('°C').doubleValue
	val double dewptc = 243.04 * (Math.log(rh/100) + ((17.625 * tempc) / (243.04 + tempc))) / (17.625 - Math.log(rh/100) - ((17.625 * tempc) / (243.04 + tempc)))
	val double dewptf = new QuantityType(dewptc, CELSIUS).toUnit('°F').doubleValue
	val Map<String, Object> params = newLinkedHashMap(
		'action' ->           'updateraw',
		'ID' ->               id,
		'PASSWORD' ->         pw,
		'dateutc' ->          sdf.format(new Date()),
		'winddir' ->          DavisVantageVueWindDirection.getStateAs(QuantityType).toUnit('°').intValue,
		'windspeedmph' ->     DavisVantageVueWindSpeed.getStateAs(QuantityType).toUnit('mph').doubleValue,
		'windgustmph' ->      DavisVantageVueWindSpeedMaximum.getStateAs(QuantityType).toUnit('mph').doubleValue,
		'windgustdir' ->      DavisVantageVueWindDirectionAverage.getStateAs(QuantityType).toUnit('°').intValue,
		'windspdmph_avg2m' -> DavisVantageVueWindSpeedAverage.getStateAs(QuantityType).toUnit('mph').doubleValue,
		'winddir_avg2m' ->    DavisVantageVueWindDirectionAverage.getStateAs(QuantityType).toUnit('°').intValue,
		'humidity' ->         DavisVantageVueHumidity.state,
		'dewptf' ->           dewptf,
		'tempf' ->            DavisVantageVueOutdoorTemperature.getStateAs(QuantityType).toUnit('°F').doubleValue,
		'rainin' ->           DavisVantageVueRainCurrentHour.getStateAs(QuantityType).toUnit('in').doubleValue,
		'baromin' ->          MeteoStickPressure.getStateAs(QuantityType).toUnit('inHg').doubleValue,
		'softwaretype' ->     'openHAB 2.4')

	var url = 'https://weatherstation.wunderground.com/weatherstation/updateweatherstation.php?'
	var first = true
	for (key : params.keySet()) {
		if (!first) {
			url += '&'
		}
		url += key + '=' + URLEncoder::encode(params.get(key).toString, 'UTF-8')
		first = false
	}

	logDebug('PWS', 'url is {}', url)
	sendHttpGetRequest(url)
end

openHAB will now report your weather station data to Weather Underground every two minutes.

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