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PostPosted: Mon Apr 16, 2012 8:38 am 
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Location: Dorset
I have a Celestron Nexstar 6se and wish to control it with my laptop using either Redshift 7 Premium or Stellarium. I have ASCOM software installed and a lead from the 15pin rs232 point of the laptop to the handset of the telescope, but following the instructions I receive a message to the effect that the telescope is 'not connected'. I guess that I may have missed some required software - driver for the telescope? Or is my cable connection incorrect? Any help/advice would be most welcome.


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PostPosted: Tue Apr 17, 2012 5:31 pm 
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Location: Wellingborough
Hi.

I have to ask if you are certain your laptop has an RS232 port, as I've read that RS232 was dropped from most laptops a few years ago. On my laptop there is a 15-pin D connector but it's intended to run an external monitor. I do use an RS232 connection to my LX90 via the handset, but the computer end of the connection is via a USB to serial converter,

HTH,

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Brian
52.3N 0.6W
Wellingborough UK.

254mm LX90 on Superwedge, WO ZS66SD, Helios 102mm f5 on EQ1, Hunter 11x80, Pentax 10x50
ASI120MC Toucam Pros 740k/840k/900nc mono, Pentax K110D
Ro-Ro roof shed


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PostPosted: Tue Apr 17, 2012 6:06 pm 
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Many thanks for your reply and suggestion - I suspect that you are right as I know that the connection can be used for video connection. Regarding the use of a usb port, does this require any different software to enable this use or is it just a matter of a 'mechanical' conversion via an adapter?


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PostPosted: Tue Apr 17, 2012 7:40 pm 
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Yes, you will need something like the gizmo depicted halfway down the page here(celestron 18775)

http://www.green-witch.com/acatalog/Cab ... ories.html

These do seem a bit pricey, and it's possible to get generic versions a lot cheaper (just Google). However it's reported that some cheaper chipsets don't work well with the telescope systems, and the advice is to look for adapters based on the "Prolific" chipset,

HTH,

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Brian
52.3N 0.6W
Wellingborough UK.

254mm LX90 on Superwedge, WO ZS66SD, Helios 102mm f5 on EQ1, Hunter 11x80, Pentax 10x50
ASI120MC Toucam Pros 740k/840k/900nc mono, Pentax K110D
Ro-Ro roof shed


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PostPosted: Tue Apr 17, 2012 8:01 pm 
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Location: Dorset
Once again very many thanks. I will certainly try that device. All I need now is clear skies!
PKS


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PostPosted: Tue Apr 17, 2012 10:03 pm 
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Joined: Tue Mar 13, 2012 9:38 am
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Location: Suffolk
I have Redshift v 7 on my Laptop and a USB to a J45 plug at the bottom of the scope handset.
However like you even though I have the Celestron driver and lots of other software on my PC when I run Redshift it tells me that no scope is connected.
It turned out that if you go to redshift, pull down menu where you set up scope, go to connections, check the port number, default in Redshift is Port 5, but the scope will look at port 9.
Just make sure you have your set to Port 9, not 5 default in software.
David

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PostPosted: Wed Apr 18, 2012 7:38 am 
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Thanks for your help. My system seems to default to COM3 - I will check out your advice when I get my usb connection sorted.
Patrick


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PostPosted: Wed Apr 18, 2012 7:44 am 
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Yes the only thing I can see in your post what you have not got is the Celestron Scope driver which you can find on the CD that was with the scope, once that is installed your ready to go okay?
David

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PostPosted: Wed Apr 18, 2012 8:08 am 
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Thanks David. I obviously have things to learn about this allegedly simple procedure!
Patrick


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PostPosted: Wed Apr 18, 2012 6:52 pm 
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No problem, I am so excited now that I can move my scope around just by clicking an item on my Redshift v 7 software, it's magic honest I'm over the moon with it, please let me know if you need any help okay?
David

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PostPosted: Thu Apr 19, 2012 6:05 am 
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I look forward to sharing the same experience, I have been asked to give a short talk about my interest in astronomy later this year and this would be a great help. I will let you know when I have the current problem sorted. Thanks again.
Patrick


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PostPosted: Fri Apr 20, 2012 5:01 pm 
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Happy to say that using a usb adaptor and the relevant software to make it act as a serial port seems to have solved the problem and I can now point the scope from Redshift 7.
Patrick


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PostPosted: Fri Apr 20, 2012 6:16 pm 
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pkshep wrote:
Happy to say that using a usb adaptor and the relevant software to make it act as a serial port seems to have solved the problem and I can now point the scope from Redshift 7.
Patrick


That's great news 8)

ATB,

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Brian
52.3N 0.6W
Wellingborough UK.

254mm LX90 on Superwedge, WO ZS66SD, Helios 102mm f5 on EQ1, Hunter 11x80, Pentax 10x50
ASI120MC Toucam Pros 740k/840k/900nc mono, Pentax K110D
Ro-Ro roof shed


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PostPosted: Fri Apr 20, 2012 6:54 pm 
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Joined: Tue Mar 13, 2012 9:38 am
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Location: Suffolk
Hello Patrick, pleased you have got it sorted, have fun.
David

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