Linux serial port listener and interpreter?

Question

I\'m using a serial device for a project, and what I\'m trying to accomplish PC side, is listening for a command sent by the serial device, interpreting the query, running s

Answer 1

Is this not what you're looking for?

while read -r line < /dev/ttyS2; do
  # $line is the line read, do something with it
  # which produces $result
  echo $result > /dev/ttyS2
done