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Nelko P21 Print CLI
Command linePrint label images from a Linux command line
This Python tool prints image files on the Nelko P21 and reads its battery, settings and loaded-label information. Use it in your own scripts to produce labels without the manufacturer’s app.
Pair the printer over Bluetooth Classic and open its RFCOMM serial connection. Match the image and label dimensions before printing. The printer’s USB serial port does not accept the documented commands, and only one Bluetooth serial connection can be active at a time.
- Print labels from a computer
- Print without the manufacturer's app
- Generate labels automatically
- Scripted image printing
- Battery and label-roll queries
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