Updating items using XML data encoded in ISO-8859-1

Setup, Configuration and Use Items & Sitemaps
, ,
11

Thanks, I ended up doing something similar but using Python and the REST API instead. It seems to be working, and with no drama about the encoding.

It might be heretical, but I can see a lot of advantages to this approach. I’ve spent a lot of time trying to decipher the nuances of the not-quite-Java, not-quite-Xtend DSL used for rules, and it’s definitely a lot easier to find answers to the same questions for Python.

Rule:

/*** Update weather from Environment Canada ***/

rule "Update EC weather"
  when
    Time cron "0 0/5 * * * ?"
  then

  executeCommandLine('python /etc/openhab2/rules/ec-weather.py', 10000)
end

Python:

import requests
from xml.etree import ElementTree

### Fetch data and extract values ###

response = requests.get('http://dd.weatheroffice.ec.gc.ca/citypage_weather/xml/ON/s0000430_e.xml')
xml = ElementTree.fromstring(response.content)

temp = xml.find('./currentConditions/temperature').text
humidity = xml.find('./currentConditions/relativeHumidity').text
windChill = xml.find('./currentConditions/windChill').text
forecastLow = xml.find('.//forecast/temperatures/temperature[@class="low"]').text

### Update OpenHAB items via REST API ###

s = requests.Session()
s.headers = {"Content-Type": "text/plain", "Accept": "application/json"}

s.put(url="http://192.168.0.121:8080/rest/items/Temperature/state", data = str(temp))
s.put(url="http://192.168.0.121:8080/rest/items/Humidity/state", data = str(humidity))
s.put(url="http://192.168.0.121:8080/rest/items/WindChill/state", data = str(windChill))
s.put(url="http://192.168.0.121:8080/rest/items/ForecastLow/state", data = str(forecastLow))
2 Likes