We just added a new senor system to the grow room and the grow tent. It is a humidity and temperature sensor networked with a WiFi portal. It is great! Simple to connect and simple to use.
Now we can get separate readings from both grow areas in near-real time on our smart phone as well as alerts when a threshold is exceeded.
The sensor uses Bluetooth to connect to the WiFi portal. The smart phone uses Bluetooth for set-up. After the sensors and the WiFi unit are networked, and after the free cloud access is set up, the mobile user can turn off the Bluetooth, and use just the WiFi access for readings from anywhere on the Internet.
See www.sensorpush.com for more information.