Platform WIZNet W7500: The IOP (Internet Offload Processor) W7500 is the one-chip solution which integrates an ARM Cortex-M0, 128KB Flash and hardwired TCP/IP core for various embedded application platform especially requiring Internet of things

Microcontroller WIZNET7500
Frequency 48MHz
Flash 128KB
Vendor WIZNet


Please use wizwiki_w7500 ID for board option in “platformio.ini” (Project Configuration File):

platform = wiznet7500
board = wizwiki_w7500

You can override default WIZwiki-W7500 settings per build environment using board_*** option, where *** is a JSON object path from board manifest wizwiki_w7500.json. For example, board_build.mcu, board_build.f_cpu, etc.

platform = wiznet7500
board = wizwiki_w7500

; change microcontroller
board_build.mcu = wiznet7500

; change MCU frequency
board_build.f_cpu = 48000000L


WIZwiki-W7500 supports the next uploading protocols:

  • cmsis-dap
  • jlink
  • mbed

Default protocol is mbed

You can change upload protocol using upload_protocol option:

platform = wiznet7500
board = wizwiki_w7500

upload_protocol = mbed


PIO Unified Debugger - “1-click” solution for debugging with a zero configuration.


You will need to install debug tool drivers depending on your system. Please click on compatible debug tool below for the further instructions and configuration information.

You can switch between debugging Tools & Debug Probes using debug_tool option in “platformio.ini” (Project Configuration File).

WIZwiki-W7500 has on-board debug probe and IS READY for debugging. You don’t need to use/buy external debug probe.

Compatible Tools On-board Default


Name Description
Mbed The mbed framework The mbed SDK has been designed to provide enough hardware abstraction to be intuitive and concise, yet powerful enough to build complex projects. It is built on the low-level ARM CMSIS APIs, allowing you to code down to the metal if needed. In addition to RTOS, USB and Networking libraries, a cookbook of hundreds of reusable peripheral and module libraries have been built on top of the SDK by the mbed Developer Community.