modbusTCPserver.begin(id)

Projects Programming
1

According to library help , by specifying the ID I expect only Server ID defined will respond to Modbus client.. but it's not! All IDs respond (1..255) !
If for instance I define

modbusTCPserver.begin(55);

I can get Modbus response even with ID 1,2,3...all
Why the ID has no effect?

2

The ID doesn't make sense in the TCP network as the IP address is identifying the server. Why do you want to send request to that IP with a wrong ID?

3

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