I have previously tried to use http://nicholas.piasecki.name/blog/2009/12/sending-a-bit-image-to-an-epson-tm-t88iii-receipt-printer-using-c-and-escpos/ and the attached Delphi translation to send a TBitmap directly to Epson TM T20, TM T80 and TM88 printers. Unfortunately it never worked.
Recently I needed to print dynamically created QR codes using the printers so it was time to revisit this. I worked directly off the C# sources provided and created a Delphi class to replicate this.
I’ve added this to a GIT repository on Bitbucket in case anyway needs to use it in future.
This uses the Synaser library from Synapse to send the buffer directly to a COM Port.
uses synaser, ssESCPOSPrintBitmap; var LBuffer : string; LDevice : TBlockSerial; begin LBuffer := #27'@'; // Initialise the printer LBuffer := LBuffer + _ESCPosPrintBitmap().RenderBitmap( 'path\to\bitmapfile' ); LBuffer := #29'V'#1 // Paper cut full // Send LBuffer to Printer LDevice := TBlockSerial.Create(); try LDevice.Config( 115200, 8, 'N', 1, False, False ); LDevice.Connect( 'COM7' ); LDevice.SendString( LBuffer ); finally LDevice.Free(); end; end.