Cancel send if no connection. (#2103)

pymodbus-dev · Mar 8, 2024 · 2e0cf9c · 2e0cf9c
1 parent b3883ce
commit 2e0cf9c
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/pymodbus/transport/transport.py b/pymodbus/transport/transport.py
@@ -379,6 +379,9 @@ def send(self, data: bytes, addr: tuple | None = None) -> None:
         :param data: non-empty bytes object with data to send.
         :param addr: optional addr, only used for UDP server.
         """
+        if not self.transport:
+            Log.error("Cancel send, because not connected!")
+            return
         Log.debug("send: {}", data, ":hex")
         if self.comm_params.handle_local_echo:
             self.sent_buffer += data