Comparison of Controller between Raspberry Pi and Arduino by using in The Gas Bubble Counter for The Fermentation Process

Abstract

Two types of controller, Raspberry Pi3 B and Arduino mega 2560, were used in a gas bubble counter for indicating progress of the fermentation process. The optimum temperature and ambient light intensity of the gas bubble counter were studied and the counting performance of the gas bubble counter controlled by these controllers at optimum condition was compared. It was found that the optimum temperature was 20-25 ^oC and ambient light intensity was with turning on the light. It was also found that at optimum condition the percentage error of this gas counting device increased as increase of the rate of CO₂ gas bubbles produced in the fermentation process. The maximum percentage error of Raspberry Pi3 B controller was 1.5%, while Arduino mega 2560 was 2.25% at bubble rate of 135 bubbles/ minute. In addition, the bubble counted by the gas bubble counter indicated amount of ethyl alcohol produced from fermentation process and the bubble rate produced from fermentation process corresponded to the yeast growth rate.