Make command timeout for workers configurable (#62)

workers/linakdesk.py

@@ -6,6 +6,9 @@ from workers.base import BaseWorker
 REQUIREMENTS = ['git+https://github.com/zewelor/linak_bt_desk.git@aa9412f98b3044be34c70e89d02721e6813ea731#egg=linak_bt_desk']
 
 class LinakdeskWorker(BaseWorker):
+
+  SCAN_TIMEOUT = 20
+
   def _setup(self):
     from linak_dpg_bt import LinakDesk
 
@@ -15,7 +18,7 @@ class LinakdeskWorker(BaseWorker):
     return [MqttMessage(topic=self.format_topic('height/cm'), payload=self._get_height())]
 
   def _get_height(self):
-    with timeout(20, exception=TimeoutError):
+    with timeout(SCAN_TIMEOUT, exception=TimeoutError('Retrieving the height from {} device {} timed out after {} seconds'.format(repr(self), self.mac, SCAN_TIMEOUT))):
       self.desk.read_dpg_data()
       return self.desk.current_height_with_offset.cm