From 26fcbd48b4b9a984c51672c6861e5b132a9796ea Mon Sep 17 00:00:00 2001
From: Sebastian Steuer <iggy@yggi.de>
Date: Sun, 24 Nov 2013 00:36:10 +0100
Subject: [PATCH] fix for import problems with MAX31855

---
 oven.py | 17 +++++++++--------
 1 file changed, 9 insertions(+), 8 deletions(-)

diff --git a/oven.py b/oven.py
index 6edf5b7..7eff995 100644
--- a/oven.py
+++ b/oven.py
@@ -2,6 +2,13 @@ import threading,time,random,datetime,logging
 
 log = logging.getLogger(__name__)
 
+try:
+    from max31855 import MAX31855, MAX31855Error
+    sensor_dummy = False
+except ImportError:
+    log.warning("Could not initialize temperature sensor, using dummy values!")
+    sensor_dummy = True
+
 class Oven (threading.Thread):
     STATE_IDLE      = "IDLE"
     STATE_RUNNING  = "RUNNING"
@@ -58,12 +65,6 @@ class Oven (threading.Thread):
         return state
 
 class TempSensor(threading.Thread):
-    try:
-        from max31855 import MAX31855, MAX31855Error
-        dummy = False
-    except ImportError:
-        log.warning("Could not initialize temperature sensor, using dummy values!")
-        dummy = True
     
     def __init__(self,oven):
         threading.Thread.__init__(self)
@@ -72,7 +73,7 @@ class TempSensor(threading.Thread):
         self.temperature = 0
         self.oven = oven
         
-        if not TempSensor.dummy:
+        if not sensor_dummy:
             cs_pin = 27
             clock_pin = 22
             data_pin = 17
@@ -82,7 +83,7 @@ class TempSensor(threading.Thread):
 
     def run(self):
         while True:
-            if not TempSensor.dummy:
+            if not sensor_dummy:
                 self.temperature = self.thermocouple.get()
             else:
                 time_delta = (20.0 - self.temperature)/40