Measurement and information system for pH and temperature value monitoring of grape must in the wine production process

This research paper describes the utilization of experimental measurement and an information system based on an ATmega328P microcontroller and a 16-bit A/D converter for application in the process of measuring and determining the pH value and temperature of the grape must during wine production. The system also contains a WiFi module enabling the measurement values to be monitored wirelessly via a local WiFi network or the Internet. Measurement of the pH value and temperature of grape must represents the basic steps in wine production. During the wine fermentation process, the pH value changes, while the temperature is maintained at 16 degrees, and this process was monitored in the wine cellar of the agricultural farm Milosavljević in Svrljig, Serbia. In addition to the proposed system, a professional pH meter was used as a reference measuring device, Eutech CyberScan pH 510, which was calibrated in a national laboratory. Measurements over the period of 10 days are presented. A comparison of the obtained measurement results with those obtained from a professional pH meter is also presented.