Ludfia Anggi Safitri Sinaga, Bela Firmantoyo, Darmeli Nasution. A Communication System Design Use Voice Over Internet Protocol (VOIP) Based On Arduino Nano ESP32 At Medan Aviation Polytechnic. Scientia [Internet]. 2024Sep.10 [cited 2025Aug.27];13(04):1309-16. Available from: https://infor.seaninstitute.org/index.php/pendidikan/article/view/2612