How to open Star Micronics mPOP cash drawer using code - objective-c

Question

I just received my mPOP device with printer ands cash drawer and I wanted to try and write a simple app to just open the cash drawer and write a log when it was opened and again when closed. I cannot find any easy documentation how to do this.
Can someone please help with the minimum code snippet to open the cash drawer and how to detect it was opened or closed?

Answer 1

The drive drawer command is ESC * r D [0|1|2|3] null, you can find it in the Command Specifications manual. The programming documentation can be found in the document StarIO_POSPrinter_iOS_SDK.pdf. Both documents can be found in the Star Micronics Developers Section. The following snippet is taken from the second manual.
Byte #5 in the command[] array on line 1 of the snippet defines which drive should be activated, possible is 0x00 (none), 0x01 (drive 1), 0x02 (drive 2) and 0x03 (both drives).
This is as far as I get without testing, but maybe you find your way from there.
unsigned char command[] = {0x1B, 0x2A, 0x72, 0x44, 0x01, 0x00};
uint bytesWritten = 0;
StarPrinterStatus_2 starPrinterStatus;
SMPort *port = nil;
#try
{
port = [SMPort getPort:#"BT:" :#"" :10000];
//Start checking the completion of printing
[port beginCheckedBlock:&starPrinterStatus :2];
if (starPrinterStatus.offline == SM_TRUE)
{
//There was an error writing to the port
}
while (bytesWritten < sizeof (command)) {
bytesWritten += [port writePort: command : bytesWritten : sizeof (command) - bytesWritten];
}
//End checking the completion of printing
[port endCheckedBlock:&starPrinterStatus :2];
if (starPrinterStatus.offline == SM_TRUE)
{
//There was an error writing to the port
}
}
#catch (PortException)
{
//There was an error writing to the port
}
#finally
{
[SMPort releasePort:port];
}