COMPAX POS Printer

This is a programming manual for the embedded printer within COMPAX POS terminal.

Introduction

COMPAX Android POS provide a general socket IO for connection of the embedded printer.

Software developers only need to send data and printer commands to the specified socket

and port, the printer will print accordingly, without any extra SDK.

Details

Calling Interface Sample

PrinterProxy requires connection timeout

Socket s = new Socket();

// IP: String type, value: 127.0.0.1 or the real local IP address
// portNum: int type, value: 9100 or 9101 (GB2312 or UTF8 encoding)
// 1000: value 1000 means connection timeout -> 1000ms

s.connect(new InetSocketAddress(IP, portNum), 1000);

OutputStream out = s.getOutputStream();
InputStream in = s.getInputStream();
Log.d(TAG, tid + " Sending data to printer server " + IP + ":" + portNum);
out.write(new byte[]{0x10, 0x04, 0x02});
out.write(printerBytes); // printerBytes is the printing data in bytes[] array

PrinterProxy DOES NOT require connection timeout

Socket s = new Socket();

// IP: String type, value: 127.0.0.1 or the real local IP address
// portNum: int type, value: 9100 or 9101 (GB2312 or UTF8 encoding)

s.connect(new InetSocketAddress(IP, portNum));

OutputStream out = s.getOutputStream();
InputStream in = s.getInputStream();
Log.d(TAG, tid + " Sending data to printer server " + IP + ":" + portNum);
out.write(new byte[]{0x10, 0x04, 0x02});
out.write(printerBytes); // printerBytes is the printing data in bytes[] array

Note (Important):

There are two version of PrinterProxy, which requires connection timeout and doesn't require. Please confirm which version is built-in the POS terminal before programming.

When portNum value is 9100, the bytes[] data in out.write() should be in GB2312 format

When portNum value is 9101, the bytes[] data in out.write() should be in UTF8 format

Before every new socket connection, please send DEL EOT command to do handshake with the embedded printer.

Command 1

0x10, 0x04, 0x01

Command 2

0x10, 0x04, 0x02

Suggest to send 0x10, 0x04, 0x02, which will return printer status, so that software determines if the printer is ready to work.

For more printer command details, please refer the general ESC/POS programming guide.