Fix ModbusSingleRequestHandler

Author: dhoomakethu

pymodbus/server/sync.py

@@ -102,12 +102,13 @@ def handle(self):
                 if data:
                     if _logger.isEnabledFor(logging.DEBUG):
                         _logger.debug("recv: " + " ".join([hex(byte2int(x)) for x in data]))
-                    if isinstance(self.framer, ModbusRtuFramer):
-                        unit_address = byte2int(data[0])
-                    elif isinstance(self.framer, ModbusAsciiFramer):
+                    if isinstance(self.framer, ModbusAsciiFramer):
                         unit_address = int(data[1:3], 16)
-                    if isinstance(self.framer, ModbusBinaryFramer):
+                    elif isinstance(self.framer, ModbusBinaryFramer):
                         unit_address = byte2int(data[1])
+                    else:
+                        unit_address = byte2int(data[0])
+
                     if unit_address in self.server.context:
                         self.framer.processIncomingPacket(data, self.execute)
             except Exception as msg:
@@ -116,7 +117,6 @@ def handle(self):
                 self.framer.resetFrame()
                 _logger.error("Socket error occurred %s" % msg)
 
-
     def send(self, message):
         ''' Send a request (string) to the network