Identification of wavelengths from the visible spectrum by means of Arduino for the generation of a knowledge base managed by PROLOGPinedo Arriaga O. Ts’zul, Pinedo Arraiga Carlos D., Herrera Alvarado Eduardo and Tinoco Varela DavidMATEC Web Conf., 210 (2018) 02048DOI: https://doi.org/10.1051/matecconf/201821002048