---
title: "Resolving IP address using DHCP - WIZ750SR"
url: "https://maker.wiznet.io/forum/15930"
markdown_url: "https://maker.wiznet.io/forum/15930/md"
type: "Forum topic"
category: "Serial-to-Ethernet & ConfigTool"
author: "dh13015317"
created: "2025-11-08T07:25:56+09:00"
last_activity: "2025-11-10T10:39:16+09:00"
language: "en"
tags: ["W7500P"]
views: 7
replies: 1
source: "WIZnet Makers forum (https://maker.wiznet.io/forum/)"
---

# Resolving IP address using DHCP - WIZ750SR

## Question

Asked by dh13015317 on 2025-11-08 in Serial-to-Ethernet & ConfigTool.

Using the WIZ750SR ver 1.2 on the EVB. Once loading [WIZ750SRv145_incl_boot.bin](https://github.com/Wiznet/WIZ750SR/releases/download/v1.4.5/WIZ750SRv145_incl_boot.bin) the device does not resolve it's IP address. Note I've tried reprogramming the device several times for other reasons and have had to re-program the MAC address. I had the same issue when trying to load W7500S2E_App_R1_V2.9.bin. Using the s2e_tool I can discover the device but it doesn't have an IP address from the router. The serial output is as follows:

==================================================
WIZ750SR
>> WIZnet Serial to Ethernet Device
>> Firmware version: 1.4.5 Stable
==================================================
- Device name: WIZ750SR
- Device mode: TCP_SERVER_MODE
- Network settings:
- Obtaining IP settings: [Static]
- TCP/UDP ports
+ S2E data port: [5000]
+ TCP/UDP setting port: [50001]
+ Firmware update port: [50002]
- TCP Retransmission retry: [8]
- Search ID code:
- Disabled: [None]
- Ethernet connection password:
- Disabled (TCP server / mixed mode only)
- Connection timer settings:
- Inactivity timer: Disabled
- Reconnect interval: [3000] (msec)
- Serial settings:
- Data UART port: [UART0]
+ UART IF: [RS-232/TTL]
+ 115200-8-N-1 / Flow control: NONE
- Debug UART port: [UART2]
+ 115200-8-N-1 / NONE (fixed)
- Serial data packing options:
- Time: Disabled
- Size: Disabled
- Char: Disabled
- Serial command mode switch code:
- Enabled
- [2B][2B][2B] (Hex only)
- Hardware information: Status pins
- Status 1: [PA_10] - PHY link
- Status 2: [PA_01] - TCP connection
- Hardware information: User I/O pins
- UserIO A: [PC_13] - Analog / Input
- UserIO B: [PC_12] - Digital / Input
- UserIO C: [PC_09] - Digital / Output
- UserIO D: [PC_08] - Digital / Output
==================================================
# MAC: 00:08:DC:7A:55:B0
# IP : 192.168.11.2 / Port: 5000
# GW : 192.168.11.1
# SN : 255.255.255.0
# DNS: 8.8.8.8

> SEGCP:UDP:STARTED
> SEG:TCP_SERVER_MODE:SOCKOPEN

## Replies

### Reply 1 by Lihan__, 2025-11-10

Hello,

Thank you for your inquiry regarding the WIZ750SR v1.2 module not receiving an IP address.

Based on the serial output you provided, the device is currently set to use a static IP configuration, as indicated by the line: "Obtaining IP settings: [Static]". This means the device is not set to request an IP address from a DHCP server such as your router. Therefore, it is expected that the device does not receive an IP address automatically in this configuration.

If you would like the device to receive an IP address automatically from your router, please change the network setting to DHCP. You can do this in one of the following ways:

Method 1 - Serial command:

1. Connect to the device via serial terminal.

2. Enter command mode by typing: +++

3. Enter the command: DI

4. Save the setting by entering: MW

5. Reboot the device with the command: RT

Method 2 - Using configuration tool:

1. Open the s2e_tool and discover the device.

2. In the network settings, change the IP configuration to DHCP.

3. Click “Write Setting” to save.

4. Reboot the device.

If you continue to experience issues after switching to DHCP mode, please verify that your router’s DHCP server is enabled and that your PC is on the same network.

Best regards,
WIZnet Technical Support

---

Source: https://maker.wiznet.io/forum/15930