My pellet burner controller code become open source. The code is in programming language C. I post it at the GitHub: https://github.com/canji/Pellet-burner-controller
Comments in the code are on the Serbian. I don't have time now to translate it. If someone need help understand the code, please contact me.
I have big omission in my previous post about pellet burner controller. Pellet burner expert which I cooperated is Miodrag Cvejin. Big thanks for him!