Subject Re: Does dbase work with pole display
From Mervyn Bick <invalid@invalid.invald>
Date Tue, 8 Oct 2019 09:36:37 +0200
Newsgroups dbase.getting-started

On 2019-10-08 12:12 AM, Emeka wrote:
> Thank you Mervyn,
> When I clicked the Display text button, It displayed errot of 'variable undefined' LENGTH in line 612 and 613 and 'variable undefined' SENDSTR in line 616 of Then when I click ignore severally, it will display my text on the pole display meaning its opening the port. Please how do I correct this error and continue.

The good news is that your computer is at least talking to the pole
display.  Now all it needs to do is to talk sense. :-)

I'm afraid it's probably nearly 20 years since I last used My computer doesn't have a serial port so the little test
form I posted previously was completely untested.  Even if I had a
serial port installed it would be difficult to sort out problems as I
don't have a similar pole display to play with. may not accept single characters as a string so my attempt
to send reset and cursorOff messages may be causing the problem.  On the
other hand, I don't recall problems sending single commands to a modem
but that was a long time ago.  Back in the days when I was working I
also had access to a Data Analyser which was a great help in fixing

I suggest you start by replacing the pushbutton1_onClick() event handler
with the following.

    function PUSHBUTTON1_onClick()
       oS = form.serialcomm1

If this works type two new messages into the entryfields and see what
happens when you click the pushbuttton.