Add linak desk worker

workers/linakdesk.py

@@ -0,0 +1,23 @@
+from interruptingcow import timeout
+
+from mqtt import MqttMessage
+from workers.base import BaseWorker
+
+REQUIREMENTS = ['git+https://github.com/zewelor/linak_bt_desk.git']
+
+class LinakdeskWorker(BaseWorker):
+  def _setup(self):
+    from linak_dpg_bt import LinakDesk
+
+    self.desk = LinakDesk(self.mac)
+
+  def status_update(self):
+    return [MqttMessage(topic=self.format_topic('height/cm'), payload=self._get_height())]
+
+  def _get_height(self):
+    with timeout(20):
+      self.desk.read_dpg_data()
+      return self.desk.current_height_with_offset.cm
+
+    return -1
+