Those who still have boosted boards and have lost their remotes know that it can get crazy expensive to replace since YC company, Boosted Boards, is no longer around. Last year, I reverse engineered the pairing protocol with an ESP32 and open-sourced everything here: https://github.com/johnathanchiu/boosted-project.

Here's a blog detailing the process and specs: https://medium.com/@johnathanchiu1065/side-project-series-re...