Modbus MCP server

This is a small helper that connects your AI assistant to Modbus, a common way machines and sensors in factories and buildings talk to each other. Once it is set up, you can ask your AI in plain words to read a value or change a setting on a Modbus device. It is handy for people who work with industrial equipment and want to check or adjust things without opening special software.

What this MCP server does

You type a request in plain words, like reading a register or turning a coil on. Your AI passes that request to this helper program. The helper then talks to your Modbus device over your network or a serial cable. It sends back the value it read or confirms the change it made. You see the answer right in the chat, no special software needed.

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What you can do with it

• Read the value of a holding register
• Write a new value to a holding register
• Check whether coils are on or off
• Turn a coil on or off
• Read input registers from a device
• Read several holding registers at once
• Ask the AI to analyze a register value with a prompt

Try asking your AI

• “Please read the value of Modbus holding register 0.”
• “Set Modbus holding register 10 to the value 100.”
• “Check the status of the first 5 Modbus coils starting at address 0.”
• “Read the values of 3 Modbus input registers starting from address 2.”

What it gives back to you

You get short answers in the chat. For a read, it shows the value or a small list of values, like Coils 0 to 4: [False, False, False, False, False]. For a write, it confirms what it changed, like Successfully wrote 100 to register 10. It can also give you a short analysis of a register value if you ask.

Before you start

Who it's for

People who work with industrial equipment, building systems, or embedded devices and want to check or adjust Modbus values through a chat.