Anchalee Manosueb, Kanyapat Moraruk, Kansadanan Saenyamas, Janjira Chintawan, Paramote Wardkein, Peeramed Chodkaveekityada: Non-Invasive Blood Sugar Level Meter Based on Light Diffuse Reflection Ratio of 2-PPG Signals. ICEIC 2025: 1-4