Arduino - stereoboy/Study GitHub Wiki References https://m.blog.naver.com/nicefleet/221285436760 https://codingrun.com/61 https://www.devicemart.co.kr/goods/view?no=12170416&NaPm=ct%3Dke4ceidb%7Cci%3Dcheckout%7Ctr%3Dppc%7Ctrx%3D%7Chk%3D672ff7d0f15fd3fdc4741c0e20a004bff8021e04 https://www.devicemart.co.kr/data/upload/kit/LevelUp_arduino.pdf