Add worker for Oral-B connected toothbrush (#55)

* create toothbrush.py

add oral-b connected toothbrushs (based on https://github.com/rfaelens/domotica/blob/master/mqtt-toothbrush.py, see https://community.home-assistant.io/t/oral-b-bluetooth-connected-toothbrush/)

* add configuration example for oral-b toothbrush

* Update README.md

workers/toothbrush.py

@@ -0,0 +1,46 @@
+import time
+from interruptingcow import timeout
+from bluepy.btle import Scanner, DefaultDelegate
+from mqtt import MqttMessage
+from workers.base import BaseWorker
+from logger import _LOGGER
+
+REQUIREMENTS = ['bluepy']
+
+class ScanDelegate(DefaultDelegate):
+  def __init__(self):
+    DefaultDelegate.__init__(self)
+
+  def handleDiscovery(self, dev, isNewDev, isNewData):
+    if isNewDev:
+      _LOGGER.debug("Discovered new device: %s" % dev.addr)
+
+class ToothbrushWorker(BaseWorker):
+  def searchmac(self, devices, mac):
+    for dev in devices:
+      if dev.addr == mac.lower():
+         return dev
+
+    return None
+
+  def status_update(self):
+    scanner = Scanner().withDelegate(ScanDelegate())
+    devices = scanner.scan(5.0)
+    ret = []
+
+    for name, mac in self.devices.items():
+      device = self.searchmac(devices, mac)
+      if device is None:
+        ret.append(MqttMessage(topic=self.format_topic(name+'/presence'), payload="0"))
+      else:
+        ret.append(MqttMessage(topic=self.format_topic(name+'/presence/rssi'), payload=device.rssi))
+        ret.append(MqttMessage(topic=self.format_topic(name+'/presence'), payload="1"))
+        _LOGGER.debug("text: %s" % device.getValueText(255) )
+        bytes_ = bytearray(bytes.fromhex(device.getValueText(255)))
+        ret.append(MqttMessage(topic=self.format_topic(name+'/running'), payload=bytes_[5] ))
+        ret.append(MqttMessage(topic=self.format_topic(name+'/pressure'), payload=bytes_[6] ))
+        ret.append(MqttMessage(topic=self.format_topic(name+'/time'), payload=bytes_[7]*60 + bytes_[8] ))
+        ret.append(MqttMessage(topic=self.format_topic(name+'/mode'), payload=bytes_[9] ))
+        ret.append(MqttMessage(topic=self.format_topic(name+'/quadrant'), payload=bytes_[10] ))
+
+    return ret