![]() ![]() Most routers come with an UART integrated into the System-on-chip and its pins are routed on the Printed Circuit Board (PCB) to allow debugging, firmware replacement or serial device connection (like modems). Typically, a router first starts its “permanent” bootloader which is responsible for the first steps of finding the OpenWrt firmware and starting OpenWrt running. During these early phases, the bootloader often gives information over the serial port and can respond to its own set of commands. These commands are not “OpenWrt” commands, but ones pre-programmed into the bootloader. Details on these commands can often be found on the device-specific pages on the OpenWrt wiki. Once OpenWrt starts running, it is generally possible to enter failsafe mode with a terminal program attached to the serial port. ![]() Either in failsafe mode, or with OpenWrt running in normal mode, it is generally possible to enter commands the same way one would if using ssh over a network. One advantage is that if you've somehow configured your router so that the network or ssh isn't working, you can still access your router to manage it. #SERIAL EXPERT CHOICE 11 ACTIVATION CODE#. ![]()
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