# modbus tcp slave
## Overview

- This project demonstrates the modbus tcp master function
- In this example project, one board serves as tcp master and the other board serves as tcp slave. The master sends a read holding register and waits for the slave to respond to the request data.

## Note
- When using enet for modbus communication and communicating with an tcp slave, you must reset the slave first and then the host.

## Board Setting

- Connect a USB port on PC to the PWR DEBUG port on the development board with a USB Type-C cable
- Connect the RGMII port or a RMII port of the two boards.

## Running the example
This is an ethernet demo: modbus tcp (Polling Usage)
LwIP Version: 2.1.2
Enet phy init passed !
Static IP: 192.168.100.10
Netmask  : 255.255.255.0
Gateway  : 192.168.100.1
modbus tcp slave example
Link Status: Down
server litened
parse ok, recv master msg len:12
Link Status: Up
Link Speed:  1000Mbps
Link Duplex: Full duplex
parse ok, recv master msg len:12
parse ok, recv master msg len:12
parse ok, recv master msg len:12
parse ok, recv master msg len:12
parse ok, recv master msg len:12
parse ok, recv master msg len:12
parse ok, recv master msg len:12
parse ok, recv master msg len:12
parse ok, recv master msg len:12
parse ok, recv master msg len:12
parse ok, recv master msg len:12
parse ok, recv master msg len:12
parse ok, recv master msg len:12
parse ok, recv master msg len:12

```