Yes, the Grobo One relies on a WiFi connection to work.
Grobo collects and analyses over 7,000 data points every day (that's a lot of math!) to ensure that your plant produces the greatest yields in the shortest amount of time. Most of the algorithms we use to do this run on our servers to anonymously analyse and improve your grow.
This connection also allows Grobo to send your emails and notifications when you have to add water or care for your plant.
If your internet goes down, Grobo can run offline for a couple of days and will automatically try to reconnect to WiFi every few minutes.