Compact Size Network Module: WIZ850io


WIZ850io is an compact-sized network module that includes W5500(TCP/IP & Ethernet MAC & PHY) & MAG-JACK (RJ45 with X’FMR) with other glue logics. As it is hardware compatible with WIZ820io, you can easily replace the WIZ820io with WIZ850io just by updating the firmwware.

For more information, please refer to the following link;

WIZnet Technology

IOT Device Platform


WIZnet (Wizard of Internet) is the IoT Device Platform company.

It’s unique technology – Hardwired TCP/IP provides better performance and stability than any other software Internet connectivity solutions. We can summarize the main features of Hardwired TCP/IP as Unattackable, High Performance and Easy to Use

Hardwired TCP/IP Chip

WIZnet (Wizard of Internet) is a unique Hardwired Internet Connectivity Solution Provider. WIZnet provides IOcP and HW TCP/IP chips, best fitted for low-end Non-OS devices connecting to the Ethernet for the internet of things.

  • WIZnet’s core technology is “Hardwired TCP/IP“.
  • WIZnet’s Hardwired TCP/IP solutions provide better performance and stability than any other software Internet connectivity solutions.
  • WIZnet develops Internet offload co-Processors for the “Internet of Things”. The Internet Offload co-Processor consists of a Hardwired TCP/IP and an Ethernet PHY.
  • The Internet Offload co-Processor easily adds Internet capability to any application. It works with any MCU and does not require an operation system.
  • WIZnet is developing Hardwired TCP and IPv4/IPv6 Dual Stack chips.



More Safty, More Stable

WIZnet hardwired TCP/IP chip is the Unattackable hardware network engine for preventing network attacks such as flooding, spoofing, injection.

The hardware TOE (TCP/IP Offload Engine) technology, which is implemented as Hardwired logic from Ethernet MAC Layer to TCP/IP Layer, is able to protect IoT system against network attack under excessive number of flooding packet by making discard flooding packets detected.



Amazing Performance!

Hardware TOE shows a superior performance compared to the software TCP/IP stack solutions.

High Speed Serial Peripheral Interface, maximum 8 independent hardware sockets support. More stable than software TCP/IP stack under SYN flood attack.

Easy to Use


Open Libraries / Examples

WIZnet provides various network protocol libraries and useful tutorials / application examples.