Do Tuan Khanh, Nguyen Van Hien. PREPAID ELECTRICITY BILL PAYMENT METHOD VIA BANK TRANSFER USING QR CODE THROUGH SEPAY PAYMENT GATEWAY INTEGRATED WITH ESP32 DEVICE. jst [Internet]. 2026Mar.12 [cited 2026Jun.11];49:67-3. Available from: https://jst.utehy.edu.vn/index.php/jst/article/view/852