Klevebrand MaxFly Drone

Open-source C++ flight controller specifically for quadcopters, built around one clear idea: it doesn't need to be harder than it needs to be.

This project takes the core from Klevebrand All-Drone Controller and implements everything you need for a solid, flyable quadcopter.

Optimized for AVR microcontrollers like the ATmega2560, but should work on any AVR with enough RAM.

Features

• High-performance C++ code — clean, simple, easy to understand, modern C++
• Optimized for AVR microcontrollers — tuned especially for ATmega2560, lightweight and efficient
• Precise motion tracking — uses the excellent BNO085 9-DOF IMU (gyro + accel + mag)
• Self-calibrating PID stabilization — the killer feature from the core library:
  Black Box optimization + Simulated Annealing automatically tunes PID values
  → no endless manual tweaking for different motors, props, batteries or frames
  → gets noticeably better the more you fly it
  → quietly keeps adapting in real-time to wind, temperature, motor wear, etc.
• Radio support — works with standard PWM receivers + can use 4G/LTE modems for serious long-range control
• GNSS/GPS — Available GPS interface to be able to implement autopilot or real time flying metrics of GNSS/GPS data.

Artificial Intelligence for PID Calibration

Tuning PID for a quadcopter so it flies stable and feels good is usually time-consuming, fiddly, and frustrating.

This flight controller fixes that.

It uses a Simulated Annealing algorithm to run small test movements on its own, then smartly adjusts the PID parameters. This black-box method finds a near-optimal tune with almost no work from you — giving crisp, stable flight much faster.

The optimization keeps running quietly during normal flights and adapts on the fly to things like gusty wind, rain, aging motors, different battery levels, or prop changes.

Over time it tunes itself to match your flying style — making the quad feel more and more dialed-in the way you like to fly.

How it relates to Klevebrand All-Drone Controller

This is the quadcopter-specific implementation built on top of the general-purpose library:
https://github.com/LordMax2/klevebrand-all-drone-controller

• The core lib handles the universal PID logic, sensor abstraction, self-tuning magic, etc.
• MaxFly Drone adds the quad-specific mixer, motor outputs, receiver parsing, and AVR optimizations so you can actually build and fly a quad right away.

License

MIT License — see the LICENSE file.