Always set exclusive serial port access. (#1964)

jameshilliard · web-flow · commit c59b9fd5b315 · 2024-02-04T08:40:34.000+01:00
Should prevent two applications from trying to access the same serial port simultaneously.
diff --git a/pymodbus/client/serial.py b/pymodbus/client/serial.py
@@ -210,6 +210,7 @@ def connect(self):
                 stopbits=self.comm_params.stopbits,
                 baudrate=self.comm_params.baudrate,
                 parity=self.comm_params.parity,
+                exclusive=True,
             )
             if self.params.strict:
                 self.socket.interCharTimeout = self.inter_char_timeout
diff --git a/pymodbus/transport/transport.py b/pymodbus/transport/transport.py
@@ -202,6 +202,7 @@ def init_setup_connect_listen(self, host: str, port: int) -> None:
                 parity=self.comm_params.parity,
                 stopbits=self.comm_params.stopbits,
                 timeout=self.comm_params.timeout_connect,
+                exclusive=True,
             )
             return
         if self.comm_params.comm_type == CommType.UDP:

Original file line number	Diff line number	Diff line change
`@@ -210,6 +210,7 @@ def connect(self):`
`210`	`210`	`stopbits=self.comm_params.stopbits,`
`211`	`211`	`baudrate=self.comm_params.baudrate,`
`212`	`212`	`parity=self.comm_params.parity,`
	`213`	`+ exclusive=True,`
`213`	`214`	`)`
`214`	`215`	`if self.params.strict:`
`215`	`216`	`self.socket.interCharTimeout = self.inter_char_timeout`
Original file line number	Diff line number	Diff line change
`@@ -202,6 +202,7 @@ def init_setup_connect_listen(self, host: str, port: int) -> None:`
`202`	`202`	`parity=self.comm_params.parity,`
`203`	`203`	`stopbits=self.comm_params.stopbits,`
`204`	`204`	`timeout=self.comm_params.timeout_connect,`
	`205`	`+ exclusive=True,`
`205`	`206`	`)`
`206`	`207`	`return`
`207`	`208`	`if self.comm_params.comm_type == CommType.UDP:`