Kulong is a post-tin mining area that is not reclaimed, resulting in the formation of a basin that is gradually filled with water through natural processes. In carrying out an inventory of kulong water to find out the potential and benefits of its water, a method is needed to measure the depth and pH value of kulong water in a practical way and can be monitored in real-time. Depth measurement usually uses an echosounder and to check the pH value using a manual pH meter. However, this method is somewhat less effective because it requires a relatively long process and the resulting data must be recorded manually. In this study, a thingsboard-based prototype design was designed to measure the depth and pH of the Kulong waters. measurement data is processed using a hotspot or WIFI internet connection. The measured value data will be processed and uploaded to the Thingsboard server, which is an online-based Internet of Things (IoT) platform. So that data can be displayed in real-time through the website and can be accessed via a laptop or smartphone.