最後更新: 2016-08-03

Most routers come with an UART( computer hardware device that translates data between parallel and serial forms) 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).

So in contrast to the JTAG-Port, the Serial Port needs some software running on the CPU so we can use it! If the bootloader is damaged, or doesn't offer such a feature, the port is useless.

recovery methods <--  bootloader is responsible for listening on it

Your computer's TX should be connected to the device's RX, and your computer's RX should be connected to the device's TX. The computer's GND should connect the the device's GND.

USB to RS232 TTL Converter Module

查看 router 是否有 UART

https://wikidevi.com/wiki/ASUS_RT-AC66U

Serial: yes, 3.3V TTL