I'm working on something similar to the OP's request... just a hobby project for my trailer because I like to tinker with such things.
It's just called dashboard right now, but it supports up 64 wired and wireless sensors; temperature, volt meters, ammeters, humidity sensors, light sensors, open-closed switches, GPS logging and as well as on-off relays.
Designed to work with a tablet or smart phone it is HTML 5 browser based... powered with a tiny embedded computer called a BeagleBone.
A database logs all this information; not sure what to do with the logs, but they're there.