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Topic: How many ports on trial version?
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| By: Guest | Posted on: Jun 11 2015 at 05:29:31 PM | Hi
I can only receive data from two open ports even though I opened four..any ppinters? | |
| By: Support | Posted on: Jun 11 2015 at 06:07:42 PM | The trial version is fully functional so there should be no problem opening any ports.
How are you using the control ? Are you putting it onto a Form ? | |
| By: Guest | Posted on: Jun 11 2015 at 06:31:20 PM | | Hi thanks from the prompt reply, I'm using a userform in Excel which can open up to 4 individual ports that are being received via a bluetooth dongle. If I open more than two the first open port will not populate a worksheet with information even though it is open, if I open all four the first two will stop working. | |
| By: Support | Posted on: Jun 11 2015 at 07:37:00 PM | If you look in Windows Device Manager how many separate com ports do you see ? Each instance of the SComm32 control requires a separate com port number.
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| By: Guest | Posted on: Jun 11 2015 at 07:48:43 PM | I get a incoming and outgoing port per each device, they are all visible in device manager and can list them using .CommName
Not sure what is going on.
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| By: Support | Posted on: Jun 11 2015 at 07:58:15 PM | Yes. it is strange. You appear to have set it all up correctly.
If I understood your first post correctly - you can use a couple of ports but when you open more ports the first ones stop working.
If you then close the last ports do the first ones start working again ?
I'm wondering if it's just a limitation in that dongle's driver. | |
| By: Mikegest | Posted on: Jun 11 2015 at 08:23:39 PM | The BT spec say one BT master can connect to 7 clients. But that's just the Bluetooth network.
Concurrent virtual com ports is another layer of code that has to be tunneled across the piconet in such a way that Windows thinks there's actually that number of real serial (com) ports.
Just because the BT spec can support 7 attached BT clients doesn't mean that you can actually get all virtual com ports running concurrently. That really depends on the manufacturer and whether they want to support more or fewer concurrent virtual com ports. | |
| By: Guest | Posted on: Jun 12 2015 at 01:43:38 PM | | Just tried replacing SComm32 with NETCcomm and have the same result...this plumber is running out of ideas. | |
| By: Support | Posted on: Jun 12 2015 at 02:13:27 PM | When you say same result with netcomm Do you mean that netcomm also just works with 2 ports ?
As I said earlier - it's possibly a limitation of that make/model of dongle. Is there a datasheet/specification page for that dongle ?
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| By: Guest | Posted on: Jun 12 2015 at 02:36:33 PM | | Yes always just two, I can be connected to 4 BT modules with the comm control and only receive anything from two, the BT modules has a built in buffer and it just fills up because they are not being accessed by comEvReceive I guess. | |
| By: Guest | Posted on: Jun 17 2015 at 05:13:25 PM | [solved] It was the BT dongle, I have bought a 4.0 Asus BT dongle and all the 4 connections now are working fine.
Thanks for all the help and very stable control. | |
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