Temperature and humidity data logger

[Doglips]

I am looking to put up a greenhouse in another state next year.  One of the things that I am looking is the ability to track temperature and humidity levels in a new greenhouse, have the data logged, set email/text alarms, and do it remotely.  I will have WiFi access at the greenhouse.
Does anyone have a recommendations for a system?  I guess I'd like to have some scalability for future upgrades, but this is not a requirement.