First grow diy automated 4x4 closet

planning to make ourselves a little SOG with 9 plants (hopefully 3 of each) Testing our first real grow room, we have used a few smart plugs that control every part (lights, fans, extraction and intake fan, humidifier, and if needed the possibility of a little heater) Set it up to turn on lights 18/6 in veg and 12/12 in flower. Also if the temperature gets to high the extraction fan turns up. If it gets to cold the extraction fan turns down. When humidity gets to low humidifier turns on and when to high humidifier turns off and extraction fan turns up. We tested it out, and we could keep temps at 26°c when lights on and 21/22°c when the lights where off. Humidity we can keep exactly what we want between 35% and 90% We are using standard soil with added perlite and buffer tablets. Also using mycorrhiza for the roots with BAC for bloom.