Techniques of providing serial port in non-legacy system via embedded-system device

An apparatus, the apparatus being an embedded-system device, comprising:

• a memory;
• and
• at least one processor coupled to the memory and configured to:
• receive first command or data through a first serial port of the embedded-system device;
• expose a second serial port to a host of the embedded-system device such that the host has control over the second serial port and receive second command or data from the host for outputting at the second serial port;
• redirect the first command or data to the second serial port when the embedded-system device is in a first mode;
• and
• allow the second command or data to be output at the second serial port when the embedded-system device is in a second mode;
• wherein to redirect the first command or data, the at least one processor is further configured to, in the first mode:
• construct third command or data based on the first command or data;
• and
• send the third command or data to the second serial port for outputting.

A non-transitory computer-readable medium storing computer executable code for operating an embedded-system device, comprising code to:

• receive first command or data through a first serial port of the embedded-system device;
• expose a second serial port to a host of the embedded-system device such that the host has control over the second serial port and receive second command or data from the host for outputting at the second serial port;
• redirect the first command or data to the second serial port when the embedded-system device is in a first mode;
• and
• allow the second command or data to be output at the second serial port when the embedded-system device is in a second mode;
• wherein to redirect the first command or data, the code is further configured to, in the first mode:
• construct third command or data based on the first command or data;
• and
• send the third command or data to the second serial port for outputting.