Android POS Printer ESC / POS

So, I've been writing an Android app for a Bluetooth printer for a while, and I realized that this is actually an ESC / POS standard: http://nicholas.piasecki.name/blog/wp-content/uploads/2009/12/ESC -POS-Command-Guide.pdf

Now the document I am using for my printer is a limited subset of these commands and can be found here: https://dl.dropboxusercontent.com/u/88265006/%E4%BA%A7%E5%93%81/Printer% 20user% 20manual / SP-MP-300-Technical% 20Manual.pdf

        private void initPrinter() {
            byte[] init = new byte[2];
            init[0] = 0x1B;
            init[1] = 0x40;
            mService.write(init);
        }

        private void printText(String message){
            byte[] send;
            try{
                send = message.getBytes("UTF8");
            }
            catch(UnsupportedEncodingException e){
                send = "Error".getBytes();
            }
            initPrinter();
            mService.write(send);
        }

      

        
        
        
      

    

I can connect to the printer, initialize it with "ESC @" and I can write with the commands above, but I cannot get any "visual" effects in terms of any type of barcode. This is my attempt at 1D EAN13 (0000000000000) code:

        byte[] height = new byte[3];
        height[0] = 0x1D;
        height[1] = 0x68;
        height[2] = (byte)30;
        //height[3] = 0;

        byte[] width = new byte[3];
        width[0] = 0x1D;
        width[1] = 0x77;
        width[2] = (byte)3;

        byte[] textPos = new byte[3];
        textPos[0] = 0x1D;
        textPos[1] = 0x48;
        textPos[2] = (byte)2;

        byte[] level = new byte[3];
        level[0] = 0x1D;
        level[1] = 0x51;
        level[2] = (byte)32;

        byte[] code = new byte[18];
        code[0] = 0x1D;
        code[1] = 0x6B;
        code[2] = 0x02;
        code[3] = 0x0D;
        code[4] = 0x30;//1
        code[5] = 0x30;//2
        code[6] = 0x30;//3
        code[7] = 0x30;//4
        code[8] = 0x30;//5
        code[9] = 0x30;//6
        code[10] = 0x30;//7
        code[11] = 0x30;//8
        code[12] = 0x30;//9
        code[13] = 0x30;//10
        code[14] = 0x30;//11
        code[15] = 0x30;//12
        code[16] = 0x30;//13

        code[17] = 0x00;//end
        mService.write(height);
        mService.write(width);
        mService.write(textPos);
        mService.write(level);
        mService.write(code);

      

        
        
        
      

    

Where mService actually writes data. The best result I get is 0█0█0█0█0█0█0█0█0█0█0█0█0█0█ - after submitting data many times in a row.

If I remove the trailing trailing byte after multiple dispatches, I get 14 0, and I also tried adding a 0 trailing to the height, width, textPosition and level arrays with no effect.

I also looked at the following places: http://www.manualslib.com/manual/689542/Axiohm-A795.html?page=91
http://pyramidacceptors.com/phoenix-printer/esc-pos-command-set/
http://www.vbforums.com/showthread.php?754493-RESOLVED-Printing-Barcode-with-ESC-POS-on-Epson-Printers
http://www.manualslib.com/manual/753647/Axiohm-A630 .html? page = 51
https://www.sparkfun.com/datasheets/Components/General/Driver%20board.pdf
Where can I find "ESC / POS"? Epson Barcode Test Program?