Interface: BluetoothGattTransport

Bluetooth Low Energy GATT.

UUIDs are typically discovered by sniffing GATT traffic from the manufacturer's mobile app (nRF Connect, LightBlue) — they are rarely published in printer documentation.

Properties

Property	Type	Description
mtu?	number	Negotiable BLE MTU; default 20 (BLE 4.0 minimum).
namePrefix?	string	Device name prefix for the browser picker filter, e.g. 'QL-820'.
rxCharacteristicUuid?	string	GATT characteristic UUID for read/notify (RX from printer). Omit if the TX characteristic also handles notifications.
serviceUuid	string	Primary GATT service UUID for this printer family.
txCharacteristicUuid	string	GATT characteristic UUID for write (TX to printer).