Integrating ESP32 with Schneider PLC via Modbus TCP: Feasibility and Tips

I’m currently working on an exciting project that involves integrating an ESP32 microcontroller with a Schneider Electric PLC, all while using an HMI panel for data visualization. The goal is to create a seamless system where the ESP32 acts as a data collector from various sensors, transmits this data via Modbus TCP, and the PLC processes and stores it in its internal registers. From there, the HMI panel will display the processed data, giving me a clear overview of the entire setup.

The network setup is designed to be straightforward: all devices will connect to a local router, with the ESP32 using WiFi and the PLC connected via Ethernet. This ensures that all components are on the same local subnet, which should simplify communication between them.

However, as I’m still in the planning phase, I have a few concerns and questions:

  • Feasibility: Is this architecture technically viable? Are there any inherent limitations or challenges I should be aware of?
  • Configuration: What are the key considerations when configuring Modbus TCP on both the ESP32 and the PLC? Are there any common pitfalls that could disrupt the data flow?
  • Compatibility: Has anyone successfully implemented a similar setup using Schneider Electric equipment? If so, were there any unexpected issues or lessons learned?

I’m eager to ensure everything is configured correctly before diving into the implementation phase. Any advice, tips, or shared experiences would be invaluable! Thanks in advance for your insights and help!