The Internet of Things (IoT) is a growing ubiquitous technology, powered with radio-frequency identification (RFID) tags embedded in devices with wireless, mobile, and sensor capability, which can capture and share data seamlessly in an information network. The scholarly and practice fields of IoT has been growing rapidly and is indicative of this technology's maturity. Its applications are widespread with enormous potential for future deployment across industry sectors. To understand the development of IoT in supply chain management, this chapter reviews IoT for digital transformation (SCM 4.0) within Industry 4.0. We put forth some technological and business challenges facing the adoption decision. This chapter summarizes the latest development of IoT applications and trends, and identifies other disruptive technologies that can complement IoT and supply chain management amid technological and business challenges. Areas of future concerns and directions are also presented.