B4J Library jSD: Bluetooth Printer

BT_Printer library allows you to print text and image to a bluetooth thermal printers
It is similar to the BT_Printer library for Android (BLE_Printer for iOS), and implementations, events and methods are almost identical.
We are working to have the same library for all platforms. On iOS it will be different because it uses BLE, but we will try to standardize the use.

This version requires an activation code. If you do not have a code then it will work in DEMO mode and you will only be able to print every 4 minutes.

Dependence: jBluetooth

jSD_BT_Printer

Author: Star-Dust
Version: 0.07

• BT_Printer
  • Events:
    • BluetoothIsDisabled
    • ConnectedToPrint (Success As Boolean)
    • DataReceived (Buffer() As Byte)
    • DiscoveryComplete (Printers As Map)
    • DiscoveryFinished
    • DiscoveryNewPrinter (Name As String, MacAdress As String)
    • DiscoveryNoDeviceFound
    • ErrorDiscovery
    • SendingError (Mac As String)
  • Functions:
    • AddBuffer_ArrayByte (B As Byte()) As String
    • AddBuffer_BarCode (Code As String) As String
    • AddBuffer_Bitmap (Bmp As Image, ShiftLeft As Int) As String
    • AddBuffer_List_Write (list As List) As String
    • AddBuffer_List_WriteLine (list As List) As String
    • AddBuffer_Tab (ArrayTab As Int()) As String
    • AddBuffer_Write (Text As String) As String
    • AddBuffer_WriteLine (Text As String) As String
    • CenterJustify As String
      after this command calls SendBufferToPrinter
    • Class_Globals As String
    • ClearBuffer As String
    • Close As String
    • Connected As Boolean
    • flushAllAndClose As String
    • Initialize (CallBack As Object, EventName As String, EncodingType As String, CodeActivation As String) As String
      Initializes the object. You can add parameters to this method if needed.
    • IsInitialized As Boolean
      Verifica se l'oggetto sia stato inizializzato.
    • LeftJustify As String
      after this command calls SendBufferToPrinter
    • RightJustify As String
      after this command calls SendBufferToPrinter
    • SearchNewPrinter As String
    • SelectFromMac (Mac As String) As String
    • SendBufferToPrinter
  • Properties:
    • Spacing
      after setSpacing command calls SendBufferToPrinter
• ESC_POS
  • Fields:
    • BoldOff As String
    • BoldOn As String
    • DoubleOff As String
    • DoubleOn As String
    • FontA_Bold As String
    • FontA_DoubleHight As String
    • FontA_DoubleWide As String
    • FontA_DoubleWideHeight As String
    • FontA_Normal As String
    • FontB_Bold As String
    • FontB_DoubleHeight As String
    • FontB_DoubleWide As String
    • FontB_DoubleWideHeight As String
    • FontB_Normal As String
    • Horizzontal As String
    • InitializePrinter As String
    • ItalicFontOff As String
    • ItalicFontOn As String
    • NoUnderline As String
    • QueryErrorCauses As String
    • QueryOfflineCauses As String
    • QueryPaperStatus As String
    • QueryPrinterStatus As String
    • Underline1 As String
    • Underline2 As String
    • Vertical As String
  • Functions:
    • Process_Globals As String
• Encoding
  • Fields:
    • Chinese As String
    • ChineseS As String
    • Code_PC437 As Int
    • Code_PC850 As Int
    • Code_PC857 As Int
    • Code_PC858 As Int
    • Code_PC860 As Int
    • Code_PC863 As Int
    • Code_WPC1252 As Int
    • DOS_Latin_1 As String
    • IBM_PC As String
    • ISO8859 As String
    • UTF8 As String
    • Windows1252 As String
  • Functions:
    • Process_Globals As String

 

[Star-Dust]

Update rel 0.02

• Now you can print images.

To get the activation code (to have the complete functions) contact me in private

 

[vvg]

Update rel 0.02

• Now you can print images.

To get the activation code (to have the complete functions) contact me in private

Is this the update of your library what i m trying for?
Can i use it for b4a?
If so, as you said how contact you privately?
Private message means private conversation in b4a community site or your email? Pl provide email if necessary to contact u on email.

 

[Star-Dust]

This section of the forum is dedicated to B4J

 

[Star-Dust]

Update rel 0.03

Inserted an example to print characters with another font using XUI.

Printer.AddBuffer_Writeline("TEST PRINTER")
Printer.AddBuffer_Writeline("_____________")
Printer.SendBufferToPrinter
Printer.ClearBuffer
Printer.AddBuffer_Bitmap(CreateImage(Chr(0xF209),xui.CreateFontAwesome(60)),0)
Printer.AddBuffer_Bitmap(CreateImage(Chr(0xF17B),xui.CreateFontAwesome(60)),0)
Printer.SendBufferToPrinter

Sub CreateImage(Text As String,Font As B4XFont) As Image
    Dim Can As B4XCanvas
    Dim V As B4XView = xui.CreatePanel("")
    V.SetLayoutAnimated(0,0,0,120,120)
 
    Can.Initialize(V)
    Can.DrawRect(Can.TargetRect,xui.Color_White,True,1)
    Can.DrawText(Text,Can.TargetRect.CenterX,Can.TargetRect.CenterY,Font,xui.Color_Black,"CENTER")
    Can.Invalidate
    Return Can.CreateBitmap
End Sub

RESULT

 

[Star-Dust]

Update rel 0.04

 

[Bob Spielen]

Helo SD, I have a BlueBamboo Model P25-M printer. Executing the example it crashes.
When I comment the lines where the example Adds a BitMap it works fine. What could it be that
the printer does not print the images?
Thanks in advance for you advice....

 

[Star-Dust]

It would be helpful for me to see the error message

 

[Bob Spielen]

To speed up processing I just placed the command: Printer.SelectFromMac("00:08:1B:95:42:BD") in B4A and the flow goes to Printer_ConnectedToPrint (Success As Boolean) as true.
The question here is related to B4J, where (Printer.SelectFromMac("00081B9542BD")) it doesn't work, I have to search first. Is it possible to connect directly without have to search the device?

 

[Star-Dust]

To speed up processing I just placed the command: Printer.SelectFromMac("00:08:1B:95:42:BD") in B4A and the flow goes to Printer_ConnectedToPrint (Success As Boolean) as true.
The question here is related to B4J, where (Printer.SelectFromMac("00081B9542BD")) it doesn't work, I have to search first. Is it possible to connect directly without have to search the device?

Make sure the string that the Mac contains is correct and formatted correctly. I see you didn't put a colon in B4J.

However I will run tests to verify.

 

[Star-Dust]

Update 0.06

• Added DiscoveryComplete (Printers As Map)
• Fix bug

As in the Android version, DiscoveryComplete has been added which will make DiscoveryNewPrinter, DiscoveryFinished and DiscoveryNoDeviceFound unnecessary.

After the search, you can only wait for DiscoveryComplete and it will return a map with the printer name as keys and MacAddr as the value. If the Map is empty it will not have found devices

Printer.SearchNewPrinter
 
Wait For Printer_DiscoveryComplete(Printers As Map)
For Each Name As String In Printers.Keys
        Log($"${Name}: ${Printers.Get(Name)}"$)
Next

 

[Star-Dust]

To speed up processing I just placed the command: Printer.SelectFromMac("00:08:1B:95:42:BD") in B4A and the flow goes to Printer_ConnectedToPrint (Success As Boolean) as true.
The question here is related to B4J, where (Printer.SelectFromMac("00081B9542BD")) it doesn't work, I have to search first. Is it possible to connect directly without have to search the device?

It appears that a scan needs to be done before connecting to the printer.

I solved the problem by keeping the MAC address of the printer.

Whenever I need to print I start scanning silently and as soon as it finds (with DiscoveryNewPrinter ) the printer that I have stored on the MAC, I start printing.

The whole is invisible to the end user

 

[Star-Dust]

Update ver. 0.07

• fix bugs
• Added justification functions