Internet of Things enabled the quality test of refilled water using value and trust design methods

Water is a natural resource and plays an important role in human life to be consumed. Water used for consumption should be clean, colorless, tasteless, odorless according the Indonesia Ministry of Health standards. The water quality test measures parameters such as pH, total dissolve solid (TDS), and water temperature based on IoT and Arduino as a microcontroller. The design of Water Quality Device Test is carried out using the value and trust design method. To solve these challenges, we propose a value-oriented reference process for innovative functionalities of a Water Quality Device Test. We have found that the consideration of the human values involved is of great importance for the identification of stakeholders throughout the development process. The results show that the comparison between laboratory test results versus Water Quality Device Test. The quality test comes from 10 depots. Based on the results of the paired sample t-test, it is known that the t-statistic or t-value for pH, TDS and drinking water temperature values shows lower value (<) than the t-table value (1.81246). These means that the pH, TDS, and temperature values of drinking water do not show differences in results when tested in the laboratory and using Water Quality Device Test.