Netatmo Binding

The Netatmo binding integrates the Netatmo Personal Weather Station into openHAB. Its different modules allow you to measure temperature, humidity, air pressure, carbon dioxide concentration in the air, as well as the ambient noise level.

See http://www.netatmo.com/ for details on their product.

Configuration

• Create an application at http://dev.netatmo.com/dev/createapp

• Retrieve a refresh token from Netatmo API, using e.g. curl:

curl -d "grant_type=password&client_id=123456789012345678901234&client_secret=ABCDEFGHIJKLMNOPQRSTUVWXYZABCDEFGHI&[email protected]&password=example" "http://api.netatmo.net/oauth2/token"

• Add client id, client secret and refresh token to openhab.cfg

netatmo:refresh=300000
netatmo:clientid=123456789012345678901234
netatmo:clientsecret=ABCDEFGHIJKLMNOPQRSTUVWXYZABCDEFGHI
netatmo:refreshtoken=ABCDEFGHIJKLMNOPQRSTUVWXYZABCDEFGHIJKLMNOPQRSTUVWXYZABCDE

• Configure items and rules

Example item for the indoor sensor:

Number Netatmo_Indoor_CO2 "Carbon dioxide [%d ppm]" {netatmo="00:00:00:00:00:00#Co2"}

Supported are Temperature, Humidity, Co2, Pressure and Noise.

Example item for the outdoor sensor (first id is the main module, second id is the outdoor module):

Number Netatmo_Outdoor_Temperature "Outdoor temperature [%.1f °C]" {netatmo="00:00:00:00:00:00#00:00:00:00:00:00#Temperature"}

Supported are Temperature and Humidity for the outdoor modules.
You have to calculate the ID for the outside module as follows: (it cannot be read from the app) if the first serial character is "h": start with "02", if the first serial character is "i": start with "03",

append ":00:00:",

split the rest into three parts of two characters and append with a colon as delimeter.

For example your serial number "h00bcdc" should end up as "02:00:00:00:bc:dc".

The rain gauge supports Rain: (What a surprise!)

Number Netatmo_Rain_Gauge "Rain [%d mm]" {netatmo="00:00:00:00:00:00#00:00:00:00:00:00#Rain"}

Example rule to send a mail if carbon dioxide reaches a certain threshold:

var boolean co2HighWarning = false
var boolean co2VeryHighWarning = false

rule "Monitor carbon dioxide level"
	when
		Item Netatmo_Indoor_CO2 changed
	then
		if(Netatmo_Indoor_CO2.state > 1000) {
			if(co2HighWarning == false) {
				sendMail("[email protected]",
				         "High carbon dioxide level!",
				         "Carbon dioxide level is " + Netatmo_Indoor_CO2.state + " ppm.")
				co2HighWarning = true
			}
		} else if(Netatmo_Indoor_CO2.state > 2000) {
			if(co2VeryHighWarning == false) {
				sendMail("[email protected]",
				         "Very high carbon dioxide level!",
				         "Carbon dioxide level is " + Netatmo_Indoor_CO2.state + " ppm.")
				co2VeryHighWarning = true
			}
		} else {
			co2HighWarning = false
			co2VeryHighWarning = false
		}
end

Common problems

Missing Certificate Authority

javax.net.ssl.SSLHandshakeException:
sun.security.validator.ValidatorException:
PKIX path building failed:
sun.security.provider.certpath.SunCertPathBuilderException:
unable to find valid certification path to requested target

can be solved by installing the StartCom CA Certificate into the local JDK like this:

• Download the certificate from https://www.startssl.com/certs/ca.pem

• Then import it into the keystore (the password is "changeit")

$JAVA_HOME/bin/keytool -import -keystore $JAVA_HOME/jre/lib/security/cacerts -alias StartCom-Root-CA -file ca.pem

source: http://jinahya.wordpress.com/2013/04/28/installing-the-startcom-ca-certifcate-into-the-local-jdk/

alternative approach if above solution does not work:

sudo keytool -delete -alias StartCom-Root-CA -keystore $JAVA_HOME/jre/lib/security/cacerts -storepass changeit  

download the certificate from https://api.netatmo.net to $JAVA_HOME/jre/lib/security/ and save it as api.netatmo.net.crt

sudo $JAVA_HOME/bin/keytool -import -keystore $JAVA_HOME/jre/lib/security/cacerts -alias StartCom-Root-CA -file api.netatmo.net.crt 

Sample data

If you want to evaluate this binding but have not got a Netatmo station yourself yet, you can add the Netatmo office in Paris to your account:

http://www.netatmo.com/en-US/addguest/index/TIQ3797dtfOmgpqUcct3/70:ee:50:00:02:20

Icons

The following icons are used by original Netatmo web app:

http://my.netatmo.com/img/my/app/module_int.png http://my.netatmo.com/img/my/app/module_ext.png

http://my.netatmo.com/img/my/app/battery_verylow.png http://my.netatmo.com/img/my/app/battery_low.png http://my.netatmo.com/img/my/app/battery_medium.png http://my.netatmo.com/img/my/app/battery_high.png http://my.netatmo.com/img/my/app/battery_full.png

http://my.netatmo.com/img/my/app/signal_verylow.png http://my.netatmo.com/img/my/app/signal_low.png http://my.netatmo.com/img/my/app/signal_medium.png http://my.netatmo.com/img/my/app/signal_high.png http://my.netatmo.com/img/my/app/signal_full.png

http://my.netatmo.com/img/my/app/wifi_low.png http://my.netatmo.com/img/my/app/wifi_medium.png http://my.netatmo.com/img/my/app/wifi_high.png http://my.netatmo.com/img/my/app/wifi_full.png