Added missing file

git-svn-id: https://redmine.imt-atlantique.fr/svn/xaal/code/Python/branches/fork@1759 b32b6428-25c9-4566-ad07-03861ab6144f

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

+
+from __future__ import print_function
+
+import xaal.lib
+import logging
+import platform
+import HTU21D
+
+
+PACKAGE_NAME = "xaal.htu21d"
+
+REFRESH_RATE = 30  # default rate : every 30 sec
+
+logger = xaal.lib.tools.get_logger(PACKAGE_NAME,logging.DEBUG,"%s.log" % PACKAGE_NAME)
+
+
+
+def build_dev(addr,devtype):
+    dev            = xaal.lib.Device(devtype)
+    dev.address    = addr
+    dev.vendor_id  = "IHSEV"
+    dev.version    = 0.1
+    dev.info       = "%s@%s" % (PACKAGE_NAME,platform.node())
+    dev.url        = "https://learn.adafruit.com/adafruit-htu21d-f-temperature-humidity-sensor/overview"
+    dev.product_id = "HTU21D/I2C"
+    return dev
+        
+
+def smooth(attribute,value,gap):
+    old = attribute.value
+    if not old:
+        attribute.value = value
+        return
+    
+    if not (old - gap <= value <= old + gap):
+        attribute.value = value
+
+
+class GW:
+    def __init__(self,engine):
+        self.engine = engine
+        self.setup()
+        
+    def setup(self):
+        cfg = xaal.lib.tools.load_cfg_or_die(PACKAGE_NAME)['config']
+        rate = REFRESH_RATE
+        if cfg.has_key('refresh'):
+            rate = float(cfg['refresh'])
+        self.engine.add_timer(self.process,rate)
+
+        dev = build_dev(cfg['thermometer'],"thermometer.basic")
+        self.temp = dev.new_attribute("temperature")
+        self.engine.add_device(dev)
+        
+        dev = build_dev(cfg['hygrometer'],"hygrometer.basic")
+        self.hum = dev.new_attribute("humidity")
+        self.engine.add_device(dev)
+
+        self.sensor = HTU21D.HTU21D()
+        
+    def process(self):
+        smooth(self.temp,round(self.sensor.read_temperature(),1),0.1)
+        smooth(self.hum,round(self.sensor.read_humidity(),0),1)
+    
+def run():
+    eng = xaal.lib.Engine()
+    gw = GW(eng)
+    eng.run()
+
+def main():
+    try:
+        run()
+    except KeyboardInterrupt:
+        print("Bye Bye...")
+        
+if __name__ == '__main__':
+    main()