Build a simple circuit using STM32

Job ID: 38750593

Budget: $10 – $30 USD

Looking for someone that ALREADY has a circuit for STM32 that has the following
-- Just a simple circuit with the STM32 chip
-- Ability to connect with Ethernet cable (Must have ethernet module)
-- Ability to be seen on network
-- Ability to update firmware from a user interface

This is low budget. Only for someone that already has this circuit or similar concept in hand.