The Gro Controller is updating its firmware.

Allow the Gro 10 minutes to complete updating its firmware. It should reboot automatically and return to normal operation in a few minutes. If it does not and after waiting 10 minutes and you're Gro still shows a purple light, your network may be down. Check to see that you can access web pages on your computer or on your phone via Wi-Fi. If your network is up and running, disconnect the Gro Controller’s power cord, wait 30 seconds, and plug it back in.

After restarting, the Gro LED may turn purple again to complete the upgrade process. It should complete and reboot when completed.