Open-Source STM32F411RE Flight Controller

This project is a compact 50 mm × 50 mm STM32-based Flight Controller PCB developed for researchers, university students, and academic laboratories working on experimental control, UAV, and robotics applications.

The design exposes a rich set of communication interfaces, including UART1 and UART6 for telemetry, debugging, or peripheral expansion, along with SPI2 and I2C3 for high-speed sensors and external devices. An onboard I²C EEPROM (M24C02) provides non-volatile storage for configuration parameters, calibration data, and system settings.

For actuator and signal control, the board provides eight timer-based outputs, implemented using Timer 2 and Timer 3 with four channels each, enabling precise PWM generation for motors, servos, ESCs, or general timing applications.

The PCB layout follows good embedded system design practices, including proper power distribution, local decoupling, and clearly separated functional blocks to improve signal integrity and development reliability. Multiple test points are included to simplify debugging, validation, and firmware development.

This flight controller is intended as an open and flexible development platform, making it well suited for:

• Academic research and experimentation
• University coursework and student projects
• Firmware development and control algorithm testing
• Custom UAV, robotics, and embedded control systems

With its compact form factor, accessible interfaces, and research-focused design, this board serves as a reliable foundation for both learning and advanced prototyping.

Project & Author Links:

• GitHub: https://github.com/SyntaxKavindu
• LinkedIn Profile: https://www.linkedin.com/in/kavindu-chamath-0b70602a5/