I have a large system 100 gal res. and use relayrunner to run my computer.
battery back up computer.
I only stay away for 3 weeks at a time no problems
1 lights automatic, input tell if they went on and if sun circle is going
2 pumps went on and filled
3 fans on and venting external
4 co2 on and rate of co2 in room
5 forced venting times and differential temps
6 room temps
7 resi. fill up automatic at time of night
8 resi, tank circulation pumps on, pre fert cycle 1 hr
Do not use automatic ph ,ppm as one small mistake , stuck valve they are toast, but if under fert and normal drinking water plants just slow down groth.
Pre computers was a bitch , with wall timmers. Now you plan out 1 or 2 years of harvest out with in a day or two , three.