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NexStar hand controller has USB port, not serial. Stellarium help...

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#1 Jason_Lyman

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Posted 19 May 2017 - 06:49 PM

Hi!

 

I've been reading about controlling my mount with Stellarium.  Looks pretty simple.  Supposed to attach laptop to hand controller via serial port to RS232.

 

Laptop is the easy part with the serial connection.

 

The hand controller must be a newer model because it doesn't have the RS232.  It has a USB port.  So, I looked up the specs and found the right cable and hooked it up to my laptop.

 

Enter Stellarium....   In the section to connect to a telescope, my options are:

- Stellarium, directly through a serial port

- External software or a remote computer

- Nothing, just emulate one (a moving reticle)

 

I see nothing about connecting by USB under "Device Settings".  It's only Serial.

 

Anyone come across this?  Any suggestions?

 

Thanks!

 

Jason



#2 Jim Davis

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Posted 19 May 2017 - 07:25 PM

The new Nexstar handsets have a USB port on the bottom, but all they did was build the USB to Serial converter into the hand controller. To Stellarium it will look like a serial port.


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#3 mclewis1

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Posted 19 May 2017 - 07:55 PM

Plug the hand controller into your PC with that USB cable. Look up the new device in the Device manager, it will be under serial devices and note the com port #.  Setup Stellarium as Jim suggested as "directly though serial port", then you will also have to enter that com port #.



#4 Jason_Lyman

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Posted 19 May 2017 - 09:19 PM

Alrighty - I'm on the right track.  It is currently showing up under "other devices".  Because of this, there's no com port #.   I'm going to go disable USB 3.0 and set it to USB 2.0 and see if that makes a change. 

 

Thanks!



#5 Jason_Lyman

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Posted 19 May 2017 - 09:30 PM

No luck moving to USB 2.0.

 

Any chance Windows 10 64bit has something to do with it?  It's certainly not showing up as a serial device.

I'll go locate another cable as well....



#6 Jim Davis

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Posted 20 May 2017 - 08:08 AM

If it is unknown devices, the driver isn't loaded. Right click on it in the device manager and have it search for drivers. If that doesn't fix it, google "prolific usb serial driver." Install it and is should work.



#7 rmollise

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Posted 20 May 2017 - 04:01 PM

No luck moving to USB 2.0.

 

Any chance Windows 10 64bit has something to do with it?  It's certainly not showing up as a serial device.

I'll go locate another cable as well....

 

No, there's no chance of that. Worked great on every Win 10 computer I used with the new HC I was testing. Some computers will not have the Prolific driver needed for the built in converter, though, so you will have to see to that.



#8 Sliebl

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Posted 20 May 2017 - 04:47 PM

The hand controller must be a newer model because it doesn't have the RS232.  It has a USB port.  So, I looked up the specs and found the right cable and hooked it up to my laptop.

Could you post a link to the cable you are using?


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#9 Jason_Lyman

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Posted 21 May 2017 - 04:41 PM

Hello Sliebl,

 

The cable is a standard USB  to Mini USB



#10 Sliebl

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Posted 21 May 2017 - 05:26 PM

Jason,

That's what I thought. Thanks for the confirmation.

-Steve



#11 Jason_Lyman

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Posted 21 May 2017 - 08:30 PM

I've actually sent a message off to Celestron to see if they can provide a link to a specific cable they recommend.  I have just now tried my third cable am stuck with:

 

"USB-Serial Controller D" under "Other Devices"

 

 

Jason



#12 Jason_Lyman

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Posted 21 May 2017 - 08:35 PM

Google is my friend.

 

I googled for "USB-Serial Controller D".   This was the first hit:

 

https://serialio.com...pter-in-windows

 

Downloaded the appropriate driver and BINGO.  I'm now moving my scope via Stellarium.

 

Thanks all!!!

 

Jason

 



#13 Michael_Swanson

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Posted 21 May 2017 - 11:48 PM

Hello,

I discuss the cable and have the required driver for Windows, Mac and Linux here at my website:
http://www.nexstarsi...m/PCControl.htm
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#14 Jason_Lyman

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Posted 22 May 2017 - 10:30 AM

Good stuff - thanks Michael!



#15 outofsight

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Posted 22 May 2017 - 02:53 PM

Did you get the Prolific driver that has been brought up. The PL2303 driver is sometimes necessary and it's often a snag in the process. AFAIK, a serial driver is necessary even though it has USB connections, or something like that.

 

http://www.prolific...._id=225&pcid=41

 

Good luck with it. 



#16 rmollise

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Posted 22 May 2017 - 03:48 PM

I've actually sent a message off to Celestron to see if they can provide a link to a specific cable they recommend.  I have just now tried my third cable am stuck with:

 

"USB-Serial Controller D" under "Other Devices"

 

 

Jason

The problem is not the cable. Any with the correct connectors will work. Your problem is the serial port aspect. This cable connects you to a usb - serial converter as has been said. If you don't give your software the com port it's assigned, or if the Prolific driver is not loaded on your PC and showing up in Device Manager, a new cord will not help you. ;)



#17 Jim Davis

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Posted 22 May 2017 - 03:49 PM

The Topic Starter has already stated he has it working.



#18 rmollise

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Posted 22 May 2017 - 03:54 PM

The Topic Starter has already stated he has it working.

 

So? The information still may be of value for the (many) people who have trouble groking the USB port on NexStar HCs. If the Moderator wants, he can delete my post--I assume you are not the mod. ;)




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