Hello johnwasser,
Thank you for your fast reply. I have already saw the datasheet of AN034 you posted with its application notes by several universities. Some universities had same purpose with mine, but they did not post any source code; I am contacting with them.
I may try to refer code in the .pdf file you posted, but not sure whether I can translate this code to Arduino.ino software, and actual pinouts are not shown.
Since I am a newbie at hardware, I hope that there are some open codes with wirings, but could not find so far.