Added fixed group (HASS support)

git-svn-id: https://redmine.imt-atlantique.fr/svn/xaal/code/Python/branches/0.7@2976 b32b6428-25c9-4566-ad07-03861ab6144f

devices/sensors/HTU21D/xaal/htu21d/devs.py

 
 from __future__ import print_function
 
-from xaal.lib import Device,Engine,tools
+from xaal.lib import Device,Engine,tools,bindings
 import logging
 import platform
 from . import HTU21D
@@ -54,14 +54,18 @@ class GW:
         rate = float(cfg['refresh'])
         self.engine.add_timer(self.process,rate)
 
-        grp_uuid = tools.get_random_uuid()
+        thermometer_addr = tools.get_uuid(cfg['thermometer'])
+        hygrometer_addr = tools.get_uuid(cfg['hygrometer'])
 
-        dev = build_dev(tools.get_uuid(cfg['thermometer']) ,"thermometer.basic")
+        # Just kidding w/ UUID 
+        grp_uuid = bindings.UUID(bytes=thermometer_addr.bytes[:-2] + bytes(2)) + 0xeeff
+
+        dev = build_dev(thermometer_addr,"thermometer.basic")
         dev.group_id = grp_uuid     
         self.temp = dev.new_attribute("temperature")
         self.engine.add_device(dev)
         
-        dev = build_dev(tools.get_uuid(cfg['hygrometer']),"hygrometer.basic")
+        dev = build_dev(hygrometer_addr,"hygrometer.basic")
         dev.group_id = grp_uuid
         self.hum = dev.new_attribute("humidity")
         self.engine.add_device(dev)