Fix send delay for bluetooth/Raspberry Pi

zaneclaes · zaneclaes · commit b799dd6b73b0 · 2019-10-29T13:01:58.000-04:00
diff --git a/obd/elm327.py b/obd/elm327.py
@@ -472,14 +472,22 @@ def __send(self, cmd, delay=None):
             returns result of __read() (a list of line strings)
             after an optional delay.
         """
-
         self.__write(cmd)
 
+        delayed = 0.0
         if delay is not None:
             logger.debug("wait: %d seconds" % delay)
             time.sleep(delay)
-
-        return self.__read()
+            delayed += delay
+
+        r = self.__read()
+        while delayed < 1.0 and len(r) <= 0:
+            d = 0.1
+            logger.debug("no response; wait: %f seconds" % d)
+            time.sleep(d)
+            delayed += d
+            r = self.__read()
+        return r
 
     def __write(self, cmd):
         """
