I know RaspberryPi platform for IoT. Recently WIZ850io is announced by WIZnet. So I implemented a RaspberryPi application by Ethernet SW modification because I can handle a source code easily. You can test the echo back application through RaspberryPi and WIZ850io. Please refer to the following step.
Step 1: Prepare Materials
1. RaspberryPi 3 Starter Kit
3. UART2USB adapter
4. LAN cable
5. USB cable
Step 2: Hardware Connection
Please connect a USB, LAN cable, WIZ850io and UART2USB adapter.
You can get more HW info on the following site.
Step 3: Prepare Development Environment
Step 4: Software
Step 5: How to Run: Modification
Step 6: How to Run: Result
For more information: