edit

modbus_tk/modbus_rtu.py

@@ -96,8 +96,8 @@ class RtuMaster(Master):
             self._t0 = t0
         else:
             self._t0 = utils.calculate_rtu_inter_char(self._serial.baudrate)
-        self._serial.inter_byte_timeout = interchar_multiplier * self._t0
-        self.set_timeout(interframe_multiplier * self._t0)
+        #self._serial.inter_byte_timeout = interchar_multiplier * self._t0
+        #self.set_timeout(interframe_multiplier * self._t0)
 
         # For some RS-485 adapters, the sent data(echo data) appears before modbus response.
         # So read  echo data and discard it.  By yush0602@gmail.com