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   Author  Topic: Unable to change modem control signals  (Read 2396 times)
ADH
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Unable to change modem control signals
« on: Dec 20th, 2010, 2:45pm »
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Hi,
 
I am using SPC 2.1.4.0 in VB.net 2008. I am trying to communicate with a device that requires RTS and DTR be driven to a low level. I am configuring the serial port to the following
 
baudrate = 9600
databits = 8
dtr = false
rts = false
flow control = none
stop bits = 1
parity = none
 
It seems that RTS and DTR are always at a high level no matter how I set the RTS and DTR properties (true or false). I am able to use another application to force RTS and DTR low so it is not my serial port. Any suggestions?
 
Thanks,
 
Andy
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Harry_Mitkov
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Re: Unable to change modem control signals
« Reply #1 on: Dec 21st, 2010, 12:19am »
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Hello
You are using the old version of Serial Port Control.
Please use this link to download the latest version (2.1.6) and check if your issue repeats:
 
http://www.fabulatech.com/serial-port-control-download.html
 
Thanks.
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ADH
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Re: Unable to change modem control signals
« Reply #2 on: Dec 21st, 2010, 8:03am »
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I found my problem. Things are working well now with 2.1.4.0. Thanks for your help. One question though. If I wanted to upgrade to the latest version would I be charged full price if I have a license for an older version?
 
 
Thanks again,
 
Andy
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George_White
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Re: Unable to change modem control signals
« Reply #3 on: Dec 28th, 2010, 6:38am »
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Andy,  
 
No, an update subscription (that allows you to download newer versions for one year) is a lot cheaper than buying a whole new license. A subscription is $ 199 (as opposed to $699 for a new one).
 
If you'd like to purchase it, please contact me at george.white@fabulatech.com and I'll give you the purchase link. By the way, in December we are offering discounts!
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