Serial Console communication with Routerboard
Mikrotik documentation combines references to “serial console” with reference to connecting a computer to a routerboard via a serial cable to access the Routerboard control console and in reference to connecting a routerboard via a serial cable to some other serial device to exchange information (EG: UPS Monitor).
So, this article attempts to clarify how to access the control console of today’s routerboards via the serial port from a computer running serial communications software such as Hyper Terminal.
Serial Cable Description
A special null-modem cable should be used for connecting to the serial port of the Routerboard. Pin-outs are described in the Mikrotik v2.9.51 documentation under Remote Administration/Serial Console and Terminal
Serial Communications Configuration
Connect the Null-Modem Serial Cable to the Routerboard serial port and to the serial port of your computer.
Configure Hyper Terminal (or other serial communication program) to the relevant serial port (EG: Com1, Com2) with the following serial communication parameters: 115200 bits per second; 8 data bits; no parity, 1 stop bit, hardware flow control.
Some older Routerboards may require a configuration of 9600 bits per second; 8 data bits; no parity, 1 stop bit, hardware flow control.
After establishing serial communication you should be prompted for the Login Name and Password. If not, try hitting the “Enter” key to illicit the response from the Routerboard.
Access Routerboard BIOS Configuration
To access Routerboard BIOS configuration, reboot the Routerboard while observing the activity on the Serial Console. You will see the following prompt on the Serial Console “Press any key within 2 seconds to enter setup” indicating that you have a 1 or 2 second window of time when pressing any key will give you access to Routerboard BIOS configuration options.
Among other things, BIOS configuration access is required for NetInstall of software.