Diah Rahmawati Ketua Penguji Asep Hardiyanto Nugroho Penguji 1 Mutia Amyranti Dosen Pembimbing 2 Vina Septiana Windyasari Penguji 1 Qias Rizki Arafat Pengarang

Brackish water aquaculture is conducted along the coastal areas, specifically in Kronjo, focusing on vannamei shrimp farming, which faces several issues related to water quality. These issues include high water temperature, unstable pH levels, and irregular salinity, all of which can affect the survival and growth of vannamei shrimp. The design of a brackish water quality monitoring tool is proposed as a solution for shrimp farms, utilizing IoT-based systems to enhance the efficiency and accuracy of monitoring temperature, pH, and salinity levels, as well as to automatically stabilize salinity. This system is expected to address conventional challenges in shrimp farming and improve production outcomes.The prototyping method allows for the rapid development of both software and hardware through the creation and evaluation of the monitoring tool. This approach facilitates interaction between developers and clients, enabling direct feedback for both software and hardware systems, such as Arduino. The design of the IoT-based brackish water monitoring tool with temperature, pH, and salinity sensors successfully meets the objectives of water quality evaluation. The tool demonstrates effective performance in regulating pond conditions and automatically sending notifications via WhatsApp. Testing indicates that the system is effective in detecting and responding to changes in water parameters. The IoT-based brackish water monitoring system successfully integrates temperature, pH, and TDS sensors with the Wemos D1-R1, providing real-time monitoring and WhatsApp notifications. This system effectively facilitates the supervision of brackish water quality