"Add UDP receive callback feature and example for implicit messaging event processing #13
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PR - Add UDP callback feature for implicit messaging
Use Case
This PR adds support for user-defined UDP receive callbacks in the EEIP Python package, enabling applications to process implicit messaging events (such as sensor triggers) from a PLC in real time. The main use case is to allow a client application to react to sensor data sent by a PLC using EtherNet/IP implicit messaging, process the data, and optionally send an acknowledgment or response back to the PLC.
Changes Made
Added the ability to register a user-defined callback function via set_udp_receive_callback(). This callback is invoked automatically whenever a UDP implicit message is received from the PLC.
Added examples/example_udp_callback.py, which demonstrates how to use the callback mechanism. The example includes a MessageProcessor class that processes incoming UDP data and sends an acknowledgment back to the PLC when a sensor event is detected.
When a callback is set, automatic UDP sending is disabled to allow the user full control over outgoing UDP packets in response to received data.