# Bluetooth issue - com port busy when restarting a new program

**URL:** <https://discourse.processing.org/t/bluetooth-issue-com-port-busy-when-restarting-a-new-program/29297>\
**Category:** Electronics (Arduino, etc.)\
**Created:** [April 12, 2021, 9:48am UTC](https://discourse.processing.org/t/bluetooth-issue-com-port-busy-when-restarting-a-new-program/29297 "2021-04-12T09:48:25Z")\
**Posts on this page:** 1\
**Showing post:** 2

<div class="post-metadata">

**Author:** ![RichardDL](https://avatars.discourse-cdn.com/v4/letter/r/f475e1/32.png) [@RichardDL](https://discourse.processing.org/u/RichardDL)\
**Post date:** [April 13, 2021, 9:24am UTC](https://discourse.processing.org/t/bluetooth-issue-com-port-busy-when-restarting-a-new-program/29297/2 "2021-04-13T09:24:14Z")

</div>

Hi @Neuro503

I don’t have the exact answer you need, but seeing there’s no avalanche of replies…

I have a few Arduino+Bluetooth(BT) projects running.

I don’t use Windows+PC+BT to connect to them. You might achieve something by running device manager, and disable/enable the com port. I’ve forgotten what the BT config looks like, but there might be ways of unconfiguring and reconfiguring there to get it to reconnect. If it works it can probably be automated with command line, which can be run from Processing.

On my Android phone I have BlueTerm2. It can always connect to the Ard+BT (if not already connected to something else). You could use this to confirm that Ard+BT is fine, problem is in PC.

You could move your project to Android phone. Example in this [topic](https://discourse.processing.org/t/anyone-possible-make-project/25109/25).

You could use a [usb-ttl serial adaptor](https://www.amazon.co.uk/dp/B07R17BMTL/ref=syn_sd_onsite_desktop_90?psc=1&uh_it=64f45e370c5eea47702ac3444ef28e4c_CT&spLa=ZW5jcnlwdGVkUXVhbGlmaWVyPUFXUDJGN1FXTzROTFYmZW5jcnlwdGVkSWQ9QTAxNTAxMjVLODgzSVpBWkg1Q1QmZW5jcnlwdGVkQWRJZD1BMDYzMzkzMFhDUE05WTZYTU5YMCZ3aWRnZXROYW1lPXNkX29uc2l0ZV9kZXNrdG9wJmFjdGlvbj1jbGlja1JlZGlyZWN0JmRvTm90TG9nQ2xpY2s9dHJ1ZQ==) connected to [HC05](https://www.amazon.co.uk/WINGONEER%C2%AE-Wireless-Bluetooth-Transceiver-Arduino/dp/B01DC9FZ2I/ref=sr_1_3?dchild=1&keywords=hc05&qid=1618305722&s=electronics&sr=1-3). This would connect reliably and give you a normal serial port on the PC. (Prices have gone up lately, CV19?)

Hope this helps,

Richard.

---

_[View the full topic](https://discourse.processing.org/t/bluetooth-issue-com-port-busy-when-restarting-a-new-program/29297)._