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FabulaTech Forum Serial Port Solutions Serial Port Control (Moderators: Sergey_Jarovski, Tim_GaliullinFT, Andrew) Unable to change modem control signals Previous topic | Next topic
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ADH
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Unable to change modem control signals
on: Dec 20th, 2010, 2:45pm 		Quote Quote  Modify Modify
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 		Quote Quote  Modify Modify
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 		Quote Quote  Modify Modify

 
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 		Quote Quote  Modify Modify
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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