fixed w1 thermosensor reading algorithm in means of adding a loop and CRC check

controller/drivers/onewire/__init__.py

@@ -1,25 +1,29 @@
+
 import re
 
 def read_one_thermo(filename):
     try:
         NO_OF_DECIMALS = 3
-        textfile = open(filename, 'r')
+        for x in range(0, 3):
-        filetext = textfile.read()
+                textfile = open(filename, 'r')
-        textfile.close()
+                filetext = textfile.read()
-
+                textfile.close()
-        matches = re.findall("t=(\-?)(\d+)", filetext)
+                if 'YES' in filetext:
-        sign = -1 if matches[0][0] == '-' else 1
+                        matches = re.findall("t=(\-?)(\d+)", filetext)
-        whole_reading = matches[0][1]
+                        sign = -1 if matches[0][0] == '-' else 1
-        first_part = matches[0][1][0:-NO_OF_DECIMALS]
+                        whole_reading = matches[0][1]
-        second_part = matches[0][1][-NO_OF_DECIMALS:]
+                        first_part = matches[0][1][0:-NO_OF_DECIMALS]
-        first_part = '0' if first_part == '' else first_part
+                        second_part = matches[0][1][-NO_OF_DECIMALS:]
-
+                        first_part = '0' if first_part == '' else first_part
-        return  (int(first_part)  +  (int(second_part) / (10.0 ** NO_OF_DECIMALS) )) * sign
+                        return  (int(first_part)  +  (int(second_part) / (10.0 ** NO_OF_DECIMALS) )) * sign
+        print 'error'
+        print e
+        return -101.0
     except Exception as e:
         print 'errror'
         print e
         return -100.0
-        
+
 def read_many_thermo(filenames):
     result = []
     for filename in list(filenames):
@@ -27,3 +31,4 @@ def read_many_thermo(filenames):
             continue
         result.append(read_one_thermo(filename))
     return result
+