Product barcode demo
QR holds full product JSON. Code 128 holds digits only (item + price + qty).
1. Enter product details (QR)
2. Numeric barcode (Code 128)
Digits only: 6-digit item code + 6-digit price (paise) + 4-digit qty.
3. Scan
Uses the phone camera. Reads QR and Code 128. HTTPS (or localhost) is required.