The porous membrane of the robotic pill was coated with polymeric enteric-alike coating, (poly(meth)acrylate), which dissolves under physiological environmental pH conditions found in certain locations in the GI tract, thus enabling the enrichment module to open in the GI tract rather than in the stomach.\cite{Xiong2020,Li2016,Wu2019,Soto2021} A table of pH values at various locations at the stomach and GI tract is presented in Table 1.\cite{Evans1988}