Windows IoT - Zebra Bluetooth Printer - printing

Question

I have two Zebra Bluetooth Printers, a MZ220 and iMZ220. The "only" thing I would do, is to print text with a Windows IoT System on a Raspberry Pi 2. Nothing more ;)
Example:
Line1 " Hello World"
Line2 "---------------"
Line3 "Date:01.01.2016"
Line4 "Time: 18:00"
The USB Bluetooth Adapter BTA-403 from ORICO, I guess works well. With the Explorer I can connect to the Printer. But, what next? How do I connect to the Printer? How do I say to the Printer print "Hello World!"
Thanks!

Answer 1

These printers are using Bluetooth like a serial port aka SSP profile.
First, you'll have to edit your app manifest and add a new device capability
<Capabilities>
<Capability Name="internetClient" />
<DeviceCapability Name="bluetooth.rfcomm">
<Device Id="any">
<Function Type="name:serialPort"/>
</Device>
</DeviceCapability>
</Capabilities>
You can get the paired printers like this
var devices = await DeviceInformation.FindAllAsync(RfcommDeviceService.GetDeviceSelector(RfcommServiceId.SerialPort));
Once you identified the right printer, you can open the connection
var service = await RfcommDeviceService.FromIdAsync(DeviceInfo.Id);
var socket = new StreamSocket();
await socket.ConnectAsync(service.ConnectionHostName, service.ConnectionServiceName);
You should be able to send then information like this
private async void PrintAsync(string line)
{
var writer = new DataWriter(socket.OutputStream);
var command = "^XA^LH30,30^F020,10^AD^FD + line + "^FS^XZ";
writer.WriteString(command);
await writer.StoreAsync();
}