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A. Viegas
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Reged: 03/05/12

Loc: New York City/ CT
Cartes losing scope connection new
      #5936047 - 06/23/13 09:23 AM

Anyone have this problem with Cartes du Ciel losing the connection with the Celestron scope? Been happening all the time now and never before? The only change I made was a different USB hub at the scope. Could this have made such a difference? I am using a prolific chipset USB-rs232 dongle.

Al

P.S. This is 4 repeater hub USB2.0 chain. So 20m + 2 5m non repeater segments, for total distance of about ~80ft. If my camera dropped out, then I would say its the length of the chained cables... but it does not. Just the CdC connection...


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Reged: 12/26/12

Re: Cartes losing scope connection [Re: A. Viegas]
      #5936067 - 06/23/13 09:41 AM

Simple, it's the Prolific dongle.

I've got one and it's OK when it's connected directly to a USB port on the PC and using a short RS232 cable BUT once you use a longer RS232 cable or connect through hubs and repeaters it gets very unreliable.

Try a FTDI adaptor, they seem to be much better.

Chris


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