Web FailSafe Uboot
From Wiki for Dragino Project
Introduction
The new shipped MS14 is equipped with the Web FailSafe UBoot from https://github.com/pepe2k/u-boot_mod/. This U-boot provide Web Interface and Netconsole feature, it eliminates the need of UART while user have to upgrade firmware in U-Boot.
To check if MS14 is loaded with the Web Failsafe U-Boot, user can press the toggle button and power on the device. The left four LEDs will blink together every second if the MS14 has the Web Failsafe U-boot.
There is a counter in the Web Failsafe U-Boot, the counter will start from 0 and it increase one on every blinking of the four LEDs. The system will be in four different working mode depends on the status of the counter: