I’m using Linksys router, and my Raspberry Pi is using HypriotOS. The problem was the Raspberry Pi won’t connect to my WIFI.
When ran the following command:
$ ifdown wlan0$ ifup wlan0
First and for most: DO NOT use the official SD formatter to format your SD card. As it will format your SD card to exFAT format, while the NOOBS image you downloaded will need FAT to do the initial boot up.