Android Question Star-Dust BT Printer library - How to get printer responses

[abilio486software]

SD: BT Printer (Bluetooth)

(No WRAP, No Java Only B4A) BT_Printer library allows you to print text and image to a bluetooth thermal printers with ESC/POS language (Here for B4J, Here for B4i) To print the QR CODES with your BT thermal printer you can create an image containing the QR code with the help of the @Erel...

www.b4x.com

How to check if the printer does not have paper or its door is open?
Do we have any event to receive answers from printer, according with the ESC/POS commands we sent to printer?

 

[agraham]

Theoretically my Bluetooth printer class can receive responses from the printer, but I haven't actually tried it.

Bluetooth ESC/POS Printer Class

For the last couple of weeks I have been playing with an 80mm Bluetooth ESC/POS thermal printer I bought off eBay, new and delivered, for the ludicrously cheap price of £20. While the print quality, particularly of images with large areas of black (they are gray due to power supply or thermal...

www.b4x.com

It's a BA class module that uses the Serial library and AsyncStreams so you can tweak it if you need to.

 

[Star-Dust]

Hi, in the various documentations it does not appear that a printer sends back any error messages or communication.

If you find one let me know

 

[abilio486software]

Hi,

With "DLE EOT n", we can obtain the printer status, knowing if the door is open or if it is out of paper.

I think you only need to triger an even to us with bytes returned by the printer.

 

[Star-Dust]

Hi,

With "DLE EOT n", we can obtain the printer status, knowing if the door is open or if it is out of paper.

I think you only need to triger an even to us with bytes returned by the printer.

We must also see how it responds. We will have to do some tests.

 

[abilio486software]

If you could trigger NewData bytes would be wonderful

Sub AStream_NewData (Buffer() As Byte)
    
    Log("len:" & Buffer.Length)
    If  Buffer.Length>0 Then
        printer_answer_byte1    = Buffer(0)
    End If
    
End Sub

 

[Star-Dust]

If you could trigger NewData bytes would be wonderful

Sub AStream_NewData (Buffer() As Byte)
   
    Log("len:" & Buffer.Length)
    If  Buffer.Length>0 Then
        printer_answer_byte1    = Buffer(0)
    End If
   
End Sub

In the current version, what arrives from the printer is sent in the LOGs.
So try to see what it returns in the logs and let me know