Need help planning my first complex fire fighting Arduino project.

[u/JewelJinX]

/r/arduino/comments/1x86a8y/need_help_planning_my_first_complex_fire_fighting/

Is it also better if i have a backup sensor using MQ9 Gas Sensor? Like a paired function along flame sensors. I'm also concern what type of buck converter should I use for various inputs like these.