---
title: "WIZ750SR-105"
url: "https://maker.wiznet.io/forum/13401"
markdown_url: "https://maker.wiznet.io/forum/13401/md"
type: "Forum topic"
category: "Serial-to-Ethernet & ConfigTool"
author: "Swap"
created: "2019-07-19T06:36:20+09:00"
last_activity: "2019-07-30T00:04:21+09:00"
language: "en"
views: 1366
replies: 1
source: "WIZnet Makers forum (https://maker.wiznet.io/forum/)"
---

# WIZ750SR-105

## Question

Asked by Swap on 2019-07-19 in Serial-to-Ethernet & ConfigTool.

Hi,
I am using WIZ750SR-105 board. It is working fine.
I want some messages on serial port like “OPEN” after connecting this module to TCP server and “CLOSE” after disconnecting from server.
Is it possible? If yes, then let me know the procedure.

Thanks in advance.

Swapnil

## Replies

### Reply 1 by rena, 2019-07-30

Hello [@Swap](https://maker.wiznet.io/u/swap),

On the WIZ750SR-105, you can use debug messages through the ISP port. (UART2)
Please refer to below.

- [WIZ750SR-105 Datasheet: ISP Port & Expansion GPIO](http://wizwiki.net/wiki/doku.php?id=products:wiz750sr-105:datasheet:start#isp_port_expansion_gpio_j1_j2)

![image](https://maker.wiznet.io/forum_uploads/wiznet/original/2X/3/31cc47fbe2107d79eb43d6ce21dd019c8c71cbf9.png)

The debug messages are displayed as follows:

```
==================================================
 WIZ750SR-1xx 
 >> WIZnet Serial to Ethernet Device
 >> Firmware version: 1.2.4 Stable
==================================================
 - Device name: WIZ750SR-1xx
 - 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] - DTR
- Status 2: [PA_01] - DSR
 - Hardware information: User I/O pins
- UserIO A: [PC_13] - Digital / Input
- UserIO B: [PC_12] - Digital / Input
- UserIO C: [PC_09] - Digital / Input
- UserIO D: [PC_08] - Digital / Input
==================================================
 # MAC: 00:08:DC:55:CC:78
 # IP : 192.168.50.21 / Port: 5000
 # GW : 192.168.50.1
 # SN : 255.255.255.0
 # DNS: 8.8.8.8

 > SEG:TCP_SERVER_MODE:SOCKOPEN
 > SEG:CONNECTED FROM - 192.168.50.80 : 61091
```

Thank you.

---

Source: https://maker.wiznet.io/forum/13401