How many register a Modbus TCP master can read from ESP32

[AndreaS73]

Using the official TCP Modbus https://docs.espressif.com/projects/esp ... pping.html as Modbus slave, I wonder how many input registers the master can read with a single operation from ESP32.

Is it like the standard? So 256 bytes, and counting for headers/CRC, it reduces to 123 words for Modbus TCP

[aliarifat794]

The theoretical limit for reading registers is 125, due to TCP overhead, it effectively limits the size of the data segment. The maximum number of words (16-bit registers) you can read in one operation is usually capped at 123 words