From Wiki for Dragino Project
The MS14 and MS14N has a toggle button which is connected to GPIO11 . and has pre-defined feature in the firmware.
The toggle button has different features depends on what running state the device is in:
- In u-boot: the toggle button can be used to select the mode for webfail u-boot, How to use this feature & source code
- In OpenWrt: the toggle button can be used to reset network configure or reset to factory default. How to use the reset feature. The button is control by triggerhappy package. The definition for how the button works please check the file : /etc/triggerhappy/triggers.d/reset-dragino.conf.