I made an optical flow and ToF lidar sensor board myself

This is an indoor altitude and position hold flight experiment using MH-FLOW v1.0b, which is an optical flow and ToF lidar ranging sensor board designed and developed myself. However, the drone doesn't hold its position precisely as I expect. Maybe it's because optical flow is a sensor that measures the rate of pixel movements, not the position, but if the algorithm is improved a little more, the performance will be better, I think. ☆★ Buy an MH-FC V2.2 and drone parts ☆★ https://www.m-hive.net/ ☆★ Download source code ☆★ https://github.com/ChrisWonyeobPark/M... ☆★ Overview of the "STM32 Drone programming from scratch" course ☆★    • [STM32 Drone programming from scratch] Cou...   ☆★ Contents of the course ☆★    • [STM32 Drone programming from scratch] 0-2...   ☆★ Introduction to the drone parts ☆★    • [STM32 Drone programming from scratch] 0-1...