The application of Internet of Things (IoT) in the agricultural sector using Arduino UnoR3 is explored in this study. The main objective is to investigate the potential of IoT in the Indonesian agricultural industry, a key economic sector. The study highlights the benefits of IoT in improving agricultural productivity and quality. IoT technology connects devices through the internet, enabling efficient and convenient operations. The research discusses various applications of IoT in agriculture, including smart irrigation, monitoring soil moisture and temperature, detecting soil fertility, automatic plant watering, monitoring soil moisture and rainfall, and agricultural security systems. The study also references previous research on IoT applications in agriculture, emphasizing the importance of IoT in modernizing agricultural practices. The study concludes that IoT can significantly enhance agricultural efficiency and productivity, and encourages further innovation in this field. The research uses Arduino UnoR3 as the main device for IoT applications, demonstrating its effectiveness in various agricultural tasks. The results show that IoT can provide real-time data and improve decision-making in agriculture, leading to better crop yields and sustainable farming practices. The study also highlights the importance of IoT in reducing manual labor and increasing the efficiency of agricultural operations. Overall, the research underscores the transformative potential of IoT in agriculture, offering practical solutions for modernizing and improving the agricultural sector in Indonesia.The application of Internet of Things (IoT) in the agricultural sector using Arduino UnoR3 is explored in this study. The main objective is to investigate the potential of IoT in the Indonesian agricultural industry, a key economic sector. The study highlights the benefits of IoT in improving agricultural productivity and quality. IoT technology connects devices through the internet, enabling efficient and convenient operations. The research discusses various applications of IoT in agriculture, including smart irrigation, monitoring soil moisture and temperature, detecting soil fertility, automatic plant watering, monitoring soil moisture and rainfall, and agricultural security systems. The study also references previous research on IoT applications in agriculture, emphasizing the importance of IoT in modernizing agricultural practices. The study concludes that IoT can significantly enhance agricultural efficiency and productivity, and encourages further innovation in this field. The research uses Arduino UnoR3 as the main device for IoT applications, demonstrating its effectiveness in various agricultural tasks. The results show that IoT can provide real-time data and improve decision-making in agriculture, leading to better crop yields and sustainable farming practices. The study also highlights the importance of IoT in reducing manual labor and increasing the efficiency of agricultural operations. Overall, the research underscores the transformative potential of IoT in agriculture, offering practical solutions for modernizing and improving the agricultural sector in Indonesia.