Prawoto, W. ., and A. . Yudhana. “Chili Plants Soil Fertility Monitoring System Based on Internet of Things (IoT)”. Buletin Ilmiah Sarjana Teknik Elektro, vol. 4, no. 3, Jan. 2023, pp. 161-7, doi:10.12928/biste.v4i3.5298.