PERANCANGAN SISTEM IDENTIFIKASI JENIS PASIR (HALUS-KASAR) BERBASIS SENSOR MPU6050 DENGAN FAST FOURIER TRANSFORM (FFT) DAN RULE -BASED THRESHOLD SERTA DASHBOARD IOT. Kohesi. 2026;11(4). Accessed October 17, 2026. https://journal.cib.institute/index.php/kohesi/article/view/4073