ESP32 POE ISO Modbus TCP library and example

Started by Unimate, April 30, 2021, 09:42:39 am

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I am looking for a Modbus TCP server library, because I would like to connect the
ESP32 POE board as a Modbus server to a Siemens PLC.
I was able to find examples for Arduino MKR WiFi 1010 via Ethernet shield (W5500)
and for Arduino NanoV3 via Ethernet shield (ENC28J60). Both work fine. But I was
not able to find an example/tutorial for the ESP32 working as a Modbus TCP server
via the hardwired Ethernet interface (LAN8710A chip).
I got the "ESP32_PoE_Ethernet_SD_Card_Arduino" example running. Even with a fixed
IP adress. But I am stuck on this Modbus TCP topic. Any help is appreciated.