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Groups > comp.lang.pascal.delphi.misc > #573

Re: Detecting Bluetooth COM port(s) in Delphi 4

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P E Schoen schrieb:
> I haven't been around much lately as my efforts have been elsewhere, but 
> recently one of my customers had problems with the USB connection from 
> his computer to my Ortmaster device, where he has a 13 kV AC supply 
> operating a closing coil on a recloser, and it causes communication to 
> stop, requiring a reset of the device and removal/reinsertion of the USB 
> connector. I tried a USB isolator but no joy.
> 
> So, I thought maybe a direct serial connection would be more robust, and 
> since he is using a desktop computer it should be possible, whereas for 
> laptops the serial port is a rarity except in the Panasonic 
> "Toughbooks". I bought one of the cheap ($8 or so) Bluetooth modules on 
> eBay and I used it at its default 9600 baud rate to collect some data, 
> and it seemed to work very well, even as far as 30 feet away through two 
> doors, and with the device inside a metal enclosure.

In the early 80s we used an 16 channgel RS-232 multiplexer in a very 
noisy environment, of thyristor-switched supplies in the MW range. 
Several km of lines installed, no transmission problems ever :-)

I cannot help with your software problems, though :-(

Happy New Year
DoDi

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Detecting Bluetooth COM port(s) in Delphi 4 "P E Schoen" <paul@peschoen.com> - 2013-12-29 08:03 -0500
  Re: Detecting Bluetooth COM port(s) in Delphi 4 Hans-Peter Diettrich <DrDiettrich1@aol.com> - 2013-12-29 16:45 +0100
    Re: Detecting Bluetooth COM port(s) in Delphi 4 "P E Schoen" <paul@peschoen.com> - 2013-12-29 13:24 -0500

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