Monitoring and Controlling System of Water Quality and Temperature in a Coffee Pot

The quality of brewed coffee is characterized by its multisensory attributes such as smell, taste, and flavor, which are affected by water quality and brewing temperature. Thus, maintaining the quality of brewed coffee is important. In this study, a control system that incorporates long-range radio (LoRa) technology for monitoring total dissolved solids (TDS) and temperature, and for controlling water levels in the coffee pot is developed. The system includes a LoRa module for data transmission without the Internet and sensors for monitoring the parameters and sending out warnings with indicators. Data on the parameters are transmitted to a remote server (a PC) and stored on the server as an Excel file. The information on the remote server can be shared with users and administrators through the Internet. The coffee pot is controlled remotely using the server's user interface. The developed coffee pot can maintain the quality of brewed coffee, and thus will be helpful to improve the service quality of hotels and restaurants.