From QBasic:
10 OPEN "com1:300,n,8,1,ds" AS #1
----(configures port)
20 PRINT #1, CHR$(7)
---(sends ASCII(7))
Note: if a higher BAUD rate is used, several characters should be sent. Change line 20
to:
20 PRINT #1, "@@@@@@@@@@@@@@@@@@@@"
---(sends 20"@" symbols)
From DOS:
C:> MODE COM1:300,n,8,1
C:> ECHO > COM1: @@@@@@@@@@@@@@@@@@@@@@
The MODE command configures the serial port. The ECHO command directs data to
the serial port.
Troubleshooting
First, re-check all the steps of the installation.
1. Verify that the AC adapter is plugged into wall power and that the connector is
firmly connected to the receptacle on the back of the cash drawer.
2. Verify that the interface connections to the computer are correct and
electrically sound. Make sure the connector is firmly plugged into the correct
port. If you are communicating to COM1: make sure the connector is plugged
into COM1: and not COM2:.
3. Make sure the drawer is unlocked and operates manually with the key. Close
the drawer.
4. Use a test program, not the vendor software - to open the cash drawer.
Symptoms usually fall into two categories:
1. An error message appears stating "write fault error". This message indicates
that the necessary handshaking between the computer and the cash drawer
did not occur. Consult the documentation for your computer to make sure the
cash drawer is plugged into the correct port (i.e. COM1:) and that the
handshaking is correct. Jumper "Request to Send" (RTS) to "Clear to Send"
(CTS) together. Jumper "Data Set Ready" (DSR) to "Carrier Detect" (DCD) to
"Data Terminal Ready" (DTR) together. The white wire from the cash drawer
must be connected to "Transmit Data" (TxD) and the black wire to "Signal
Ground" (SG).
