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42 lines
1.3 KiB
Markdown
42 lines
1.3 KiB
Markdown
---
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title: NIIMBOT hardware interfacing
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---
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# Hardware interfacing
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## Bluetooth
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NIIMBOT printers have two bluetooth addresses.
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In case of D110 :
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* `26:03:03:c3:f9:11` - low energy
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* `03:26:03:C3:F9:11` - classic
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### Bluetooth Low Energy
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You can interact with printer through a specific BLE characteristic.
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To find what characteristic is suitable for this:
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1. Find services which have UUID length > 4.
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2. Find characteristic in these services which have `NOTIFY` and `WRITE_WITHOUT_RESPONSE` properties.
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Unfortunately, this process is can't be done with Web Bluetooth API (you must set service UUID in filter before devices searching).
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Anyway, most of NIIMBOT printers have characteristic `bef8d6c9-9c21-4c9e-b632-bd58c1009f9f` of service `e7810a71-73ae-499d-8c15-faa9aef0c3f2`.
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NiimBlueLib uses these UUIDS for interfacing.
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If you found characteristic, you can subscribe for notifications to get responses from the printer.
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To send data, write a value without response.
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### Bluetooth Classic
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Use bluetooth serial.
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## Serial (USB)
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Packet format is same as Bluetooth. The only problem is that packets may be fragmented.
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For example, packet `5555d9091f90044c000001000016aaaa` can be received as `5555d9091f90044c000001000016` `aaaa`.
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