Prevented infinite loop

frappy_psi/capacitance_readings/TSSOP16.py

@@ -7,6 +7,7 @@ from frappy.core import Readable, Parameter, FloatRange, HasIO, StringIO, Proper
 class TSSOP16_IO(StringIO):
     end_of_line = '\r'
     wait_before = 0.0 #3.0
+    timeout=3.0
     identification = [ ('*IDN?', r'0x48,ACM1219,.*') ]
     
 class TSSOP16(HasIO, Readable):
@@ -16,7 +17,7 @@ class TSSOP16(HasIO, Readable):
     value = Parameter('value', FloatRange(unit='pF'), readonly=True)
     pollinterval = Parameter(default=0.1)
     
-    def read_value(self):
+    def read_off_cvt(self, recursive_layer=0):
         try:
             l = self.communicate('readCVT')
             vals = l.split(',')
@@ -24,8 +25,16 @@ class TSSOP16(HasIO, Readable):
             #print(vals)
             return vals[0]
         except:
+            return self.read_off_cvt()
             traceback.print_exc()
             self.io.closeConnection()
             self.io.connectStart()
             time.sleep(3.0)
-            return self.read_value()
+            if(recursive_layer > 10):
+                return -1
+            else:
+                return self.read_off_cvt(recursive_layer+1)
+    
+    def read_value(self):
+        res = self.read_off_cvt()
+        return res