TR-017 / Software & Control
kotPrinter
A Python CLI for a cat-shaped Bluetooth printer whose official app was the least useful part of the package.
THE PROTOCOL / BLUETOOTH RFCOMM
The app was the first problem.
The printer arrived with a mobile app. The app was, gently speaking, not great. Existing tools did not work with this particular cat-shaped machine either, so the reasonable next step was to capture its Bluetooth traffic and reverse-engineer enough of the protocol to print from a Raspberry Pi. kotPrinter turns text or images into a 384-dot-wide monochrome raster and sends it over RFCOMM. It is not CUPS, not a print server and definitely not enterprise infrastructure. It prints tiny receipts without a manufacturer account. Mission accomplished.
- Category
- Software & Control
- Project ID
- TR-017
- Source files
- Available
- Photographs
- 1
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