Barcode CODE128 example (printer auto-encodes): 1D 6B 49 <data...>

Print "Hello" with newline: 48 65 6C 6C 6F 0A

QR code (generic sequence — device-dependent): 1D 28 6B 04 00 31 41 32 00 1D 28 6B 03 00 31 43 06 1D 28 6B 05 00 31 50 30 1D 28 6B 03 00 31 51 30

Feed 5 lines and full cut: 1B 64 05 1D 56 00

Center alignment, double width: 1B 61 01 1D 21 10 54 65 73 74 0A

Bold on, text, bold off: 1B 45 01 54 65 73 74 1B 45 00 0A

Drawer kick (connector 2, 100ms on, 100ms off): 1B 70 01 64 64