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* This section was written on the assumption that the use of WIZ750SR-RS232 evaluation board.

Figure: WIZ750SR Rev. 1.1 Evaluation Board Package

The WIZ750SR-232 evaluation board package contains the following parts.

• WIZ750SR-232 Module
• WIZ750SR-232/TTL-EVB Evaluation Board
• Cables (Ethernet / Serial / Micro USB Type B)

The entire list of parts of the board is available at the WIZ750SR Overview: Product Contents page.

• ARM Cortex-M0 based Hardwired TCP/IP core plus PHY Ethernet MCU W7500P ¹⁾ [1]
• Reset IC [3]
• Power LED(red) [4]
• Status LED (blue: PHY link status / green: TCP connection status) [5]
• 4-Channel ESD Protection IC [6]
• RS-422/485 Transceiver (Optional, WIZ750SR-RS485 module mount only) [7]
• RS-232 Transceiver (Optional, WIZ750SR-RS232 module mount only) [8]

• Ethernet Network Connector: RJ-45 with transformer [2]
• Data UART Port: 6×2 2.54mm Pin header
• Debug UART Port: 6×1 2.54mm Pin header (Debug UART pins and MCU boot pin / GND)
• User I/O Pins: 6×1 2.54mm Pin header (4-Pins user I/O and application boot pin / GND)

• Configuration tool program (Download page)
• TCP server / TCP client / UDP terminal program
• Serial terminal program

• Your WIZ750SR module and Evaluation board
• Ethernet cable
• USB type B cable (for Debug UART)
• DB9 serial RS-232 cable (for Data UART, RS-232/TTL Ver. only)
• Power source for device
  • Such as 5V DC adapter, USB port on your computer, or 3.3V Power source

• Operation mode: TCP server mode
• Debug message: Enabled
• Serial command mode switch: Enabled
• Serial command mode switch code: +++ (hex code, [2B][2B][2B])

• Data packing option - Time: Disabled
• Data packing option - Size: Disabled
• Data packing option - Char: Disabled

• Inactivity Timer: Disabled
• Reconnection Timer: 3 second
• Keep-Alive: Enabled, 7-sec initial delay, 5-sec send interval

* When the WIZ750SR's settings are factory default,

• User should to matching the network settings of 'WIZ750SR's remote host' and 'PC (or laptop)' for testing TCP client/mixed mode.

• If the DHCP(automatic IP allocation) is used, both the WIZ750SR and test PC must be set to be assigned the same IP from the same router.

Connect the WIZ750SR module to evaluation board and also the cable as shown in the picture below.

• Ethernet Cable
  • Used to connect the evaluation board’s RJ-45 connector and the PC’s Ethernet network interface card (PC's RJ-45 connector)

• Serial Cable
  • Used to connect the evaluation board’s DB9 connector and the serial interface card (DB9 connector). If the PC does support serial interface, use the RS-232 to USB converter.

• Optional: USB type B cable (for debug message)
  • Used to connect the evaluation board’s USB connector and the PC’s USB connector.

Figure: Combining WIZ750SR module and EVB

Figure: WIZ750SR-EVB side view

Connect the 5V power adaptor or USB cable to the evaluation board and turn on the power switch.

• The power LED will turn red once the evaluation board is on.

Open the configuration tool and click the search button. If the board is turned on and connected to the same network, the MAC address or settings of the WIZ750SR module can be checked using the configuration tool.

Figure: WIZnet Configuration Tool

Change the settings accordingly to the customer’s environment. The test shown in this document is based on factory setting.

• Click the setting button to apply the changes in settings of the configuration tool.

Connect the PC as the TCP client of the user’s serial device for data communication testing. In order to do this, the serial terminal program / TCP client terminal program must be opened on the PC. The serial terminal program and TCP client program must be set as below.

• Serial terminal program: 115200-8-N-1, Flow control: None
• TCP client program: 192.168.11.2:5000 (The IP address and port number of WIZ750SR)

The COM port for serial terminal program connection can be checked as below.

• Control Panel > System > Device Manager

Figure: Device Manager

The basic data communication of the WIZ750SR can be verified as below.

• Serial to Ethernet: data communication verification
  • Enter the character string in the serial terminal and check if the identical character string appears on the TCP client terminal.

• Ethernet to Serial: data communication verification
  • Enter the character string in the TCP client terminal and check if the identical character string appears on the serial terminal.

Now you’re ready to use the WIZ750SR!

• This document is based on the assumption of the PC as the serial device / remote network device.

• The next step is to connect the WIZ750SR module to the target serial device and check if the device can communicate, control, and monitor via the remote PC or monitoring server.