About WIZ550S2E-Modbus project on github

TCP/IP Chip W5100S
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Dear all
On github this WIZ550S2E-Modbus project, there is no function code processing function?

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Hello @Bohu-Tang

What does function code processing function mean?

Do you mean the function code processing function to find the function as shown in the picture below?

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Hi austin
Thanks for your answer.I am looking for a Modbus-TCP protocol function code handler, such as function code 03,04,06,10, but I can’t find it in this project. Am I find in the wrong place?

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Hi austin
I came up with a way to use the mbtcpcpppackage function to write a switch() function after the if(usPID==MB_TCP_PROTOCOL_ID) function to determine the corresponding function code, and then enter the corresponding function code. I don’t know if that’s possible, because this function is static bool.

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Such as this. This function is to judge the function code of Modbus-RTU.But I think it should be the same for Modbus-TCP.if(usPID==MB_TCP_PROTOCOL_ID), it indicates that Modbus-TCP has been identified, and you can check the function code. I don’t know if my logic is right. If you have any questions, please give me your suggestions.

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Hi austin
Can you help me with the question？

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Hi @Bohu-Tang

If you need any functions, you can add them and use them.

If you need the function code processing function I think it would be okay to add it after the ‘if( usPID == MB_TCP_PROTOCOL_ID )’ conditional statement as mentioned above.

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Thanks a lot for your answer.