WiFi Pineapple NANO
The single blue LED indicates bootup and WiFi operation. While starting up, the LED will flash. Once bootup has completed the LED will become solid. The LED will flicker to indicate activity on the first WiFi radio – wlan0. This radio is host to the Access Point.
WiFi Pineapple TETRA
The yellow LED indicates activity on the WAN eth0 RJ45 Ethernet port. The blue LED indicates activity on the wlan0 wireless interface, home to the access point. The red LED indicates activity on the wlan1mon wireless interface, used by PineAP and other applications for sniffing and injection.
The boot sequence is: yellow solid followed by a moment of no LED activity, then blue blinking until bootup is complete.