How to program Cooking oil ATM logic board

Learn how to build a custom cooking oil ATM logic board using an Arduino Pro Mini and an STM32 Blue Pill! In this step-by-scale tutorial, we dive into hardware interfacing, serial communication, and embedded logic to create a reliable dispensing control system. Whether you're building a liquid vending machine for a commercial project or exploring multi-microcontroller systems, this guide covers the wiring, programming, and logic required to get it running smoothly. What you'll learn: Combining Arduino Pro Mini and STM32 Blue Pill for embedded control Setting up reliable dispensing logic for liquid/oil vending Interfacing hardware peripherals and managing power