Cant open the cash drawer

SOURCE: Cash Drawer Command

The cashdrawer is SERIAL, you'll need to connect it to a COM port. The
software you're using has to be capable of sending data to the COM port
the cashdrawer is connected to when the cashdrawer needs to be opened.
From the site you mentioned:

Be sure drawer lock is not engaged.
Exit your system to a DOS prompt. Type the following commands (substitute
the correct com port for com1):
c:\>mode com1:300,n,8,1
c:\>echo "000000000000000000000">com1
The cash drawer should open.

About the cashdrawer RJ11 connection on the printer: You can connect any
solenoid driven cashdrawer to this port. The port uses pin 2 and 4 for
the voltage output, which is normally 24V on Epson receipt printers.
Sending a specific ESC character (every POS software should be capable of
doing this) to the printer will be recognized by the printer and the
printer puts 24V on the 2 pins mentioned for 300ms and voila, the drawer
opens.

SOURCE: how to eject cash drawer pos

Open the Cash Drawer
Hex code
<1B><70><30><40><50>

SOURCE: need help with programing IBM 4694-245 pos cash register

ftp://ftp.software.ibm.com/software/retail/pubs/hw/4694/4694_fs.pdf

Try this manual let me know if it works also dont forget to rate me please.
RObert

SOURCE: Cash drawer problems

in the setup screen > in hardware section> select "USB printer" to open drawer

SOURCE: CRE POS serial scanner doesn't scan

Is the scale set to NCI or Weightronix mode? In our software, The General Store, we have scale options for both of these emulations.

We also have settings for baud rate, parity, etc. for each com port.

Se if CRE has similar options in their software's peripheral device setup.

If it is the scanner that is causing fits, see if they support serial barcode scanners. If not, then you need to use something like twedge.