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The SuitePOS app automatically detects Bluetooth printers (and connects to them) based on the port name. As such it is important you have the correct port name.
If a Bluetooth printer is not detected, a LAN/WIFI printer is assumed and as such it will default the port name to the IP address of the printer configured on the POS Terminal record.
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Failing to set the correct port name will result in the printer failing to connect or work.