THIẾT KẾ BỘ ĐIỀU KHIỂN VƯỜN LAN THÔNG MINH, CÓ CODE PAGE MERGEFORMAT I CHAPTER 1 INTRODUCTION 1 1 Introduction topic IoT is now an indispensable thing in the 4 0 era, controlling everything through the internet seems to have become an indispensable thing That shows a lot in the fact that in current 4 0 factories, management engineers can control everything in the factory right from home Most devices in the future will be internet connected even the coffee machine can make a hot cup of coffee.