Building an Industrial Access Control Gateway with WIZnet W6300-EVB-Pico2

A production-grade firmware architecture that brings together MQTT, Wiegand readers, RS485 devices, I2C LCD, RTC, and SD card storage — all running on a single

lawrence

Published July 06, 2026

145 UCC

9 WCC

19 VAR

Original author: John BairdOriginal source (new tab)

Components

Hardware components

WIZnet - W6300-EVB-Pico2

x 1

Project description

Building an Industrial Access Control Gateway with WIZnet W6300-EVB-Pico2 A production-grade firmware architecture that brings together MQTT, Wiegand readers, RS485 devices, I2C LCD, RTC, and SD card storage — all running on a single RP2350-based board. Project Overview This project is an industrial-grade Access Control Gateway firmware built around WIZnet's W6300-EVB-Pico2 board. The full source is published by GitHub user JohnBaird in the rpi_pico2_6300 repository and is also featured on the WIZnet Maker platform. This is not a toy demo. The firmware tackles a real-world problem…

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