Example script to access domoticz from eventghost, I'll make this in a plugin somewhere in the future :)

eventghost_domoticz.py

LIGHT_ID = 123
LIGHT_LEVEL = 40
DOMOTICZ_URL = 'http://domoticz/json.htm?'

def fetch(**kwargs):
    import json
    import urllib

    params = urllib.urlencode(kwargs.items())
    url = DOMOTICZ_URL + params
    print 'Fetching', url
    return json.load(urllib.urlopen(url))

def set_level(light, level):
    fetch(type='command', param='switchlight', idx=light, switchcmd='Set Level',
          level=level)

def get_state():
    devices = fetch(type='devices', used='true')
    state = dict()
    for device in devices['result']:
        state[int(device['idx'])] = device

    return state

if not hasattr(eg.globals, 'domoticz'):
    eg.globals.domoticz = get_state()

light = eg.globals.domoticz[LIGHT_ID]
if light['Status'] == 'On':
    eg.globals.domoticz = get_state()
    set_level(LIGHT_ID, LIGHT_LEVEL)