# Ground Control connection issue
**URL:** https://forums.maslowcnc.com/t/ground-control-connection-issue/4411
**Category:** Ground Control
**Created:** [June 17, 2018, 1:56pm UTC](https://forums.maslowcnc.com/t/ground-control-connection-issue/4411 "2018-06-17T13:56:36Z")
**Posts on this page:** 14
**Page:** 1
### Author:  [@cawjenchicken](https://forums.maslowcnc.com/u/cawjenchicken)
#### Post date: [June 17, 2018, 1:56pm UTC](https://forums.maslowcnc.com/t/ground-control-connection-issue/4411/1 "2018-06-17T13:56:36Z")
when i plug in the usb ground control will connect then lose connection and repeat non stop any ideas what is wrong. i am not very computer savy
i am running on a mac. i have downloaded all the newest firmware and updates
---
### Author:  [@blurfl](https://forums.maslowcnc.com/u/blurfl)
#### Post date: [June 17, 2018, 2:20pm UTC](https://forums.maslowcnc.com/t/ground-control-connection-issue/4411/2 "2018-06-17T14:20:24Z")
Welcome @cawjenchicken!
GC prints the ‘connected’ message when it connects to the chosen port. Then it starts a dialog with the firmware. If the dialog fails, it prints the ‘disconnected’ message, disconnects, waits a bit then tries again.
There are a couple things that can cause the dialog to fail. One is when some other program (often Arduino) has control of that serial,port. Quitting that program should correct that. Another is not having the firmware loaded. Another is choosing the wrong serial port in GC (on the Mac, it will be named something like ‘/dev/tty.usbmodemFD151’).
Check these things, and let us know how you’re getting on.
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### Author:  [@cawjenchicken](https://forums.maslowcnc.com/u/cawjenchicken)
#### Post date: [June 17, 2018, 6:45pm UTC](https://forums.maslowcnc.com/t/ground-control-connection-issue/4411/3 "2018-06-17T18:45:47Z")
thanks for the fast response
looks like the firmware did not fully load. i uninstalled all firmware and reinstalled it and ground control started working.
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### Author:  [@blurfl](https://forums.maslowcnc.com/u/blurfl)
#### Post date: [June 17, 2018, 7:10pm UTC](https://forums.maslowcnc.com/t/ground-control-connection-issue/4411/4 "2018-06-17T19:10:16Z")
Great news! Many happy wood chips 😁
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### Author:  [@Gero](https://forums.maslowcnc.com/u/Gero)
#### Post date: [June 17, 2018, 8:16pm UTC](https://forums.maslowcnc.com/t/ground-control-connection-issue/4411/5 "2018-06-17T20:16:33Z")
> [@blurfl](#):
>
> Many happy wood chips 😁
i will just copy that.
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### Author:  [@Daves-wood-turnings](https://forums.maslowcnc.com/u/Daves-wood-turnings)
#### Post date: [July 6, 2018, 9:43pm UTC](https://forums.maslowcnc.com/t/ground-control-connection-issue/4411/6 "2018-07-06T21:43:18Z")
Hi. jumping in here. I have the same issue with windows 10. even after shutting down and walking away.
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### Author:  [@blurfl](https://forums.maslowcnc.com/u/blurfl)
#### Post date: [July 6, 2018, 10:49pm UTC](https://forums.maslowcnc.com/t/ground-control-connection-issue/4411/7 "2018-07-06T22:49:08Z")
Hi, let’s get you connected! You could check to make sure that the firmware has properly loaded on the Arduino Mega. In the Arduino program, in the ‘Tools’ menu, choose ‘Serial Monitor’. At the bottom of that window there is a drop-down list of baud rates, choose ‘57600 baud’. You should see somethinbg like:
```auto
Grbl v1.00
ready
ok
[Forward Calculating Position]
position loaded at:
0.01
-0.01
[PE:0.00,0.00,127]
[PE:0.00,0.00,127]
[PE:0.00,0.00,127]
[PE:0.00,0.00,127]
[PE:0.00,0.00,127]
[PE:0.00,0.00,127]
[PE:0.00,0.00,127]
[PE:0.00,0.00,127]
```
If you see that, you’ve got the firmware loaded and it’s waiting to talk to GroundControl. Quit Arduino, run GroundControl and check that the port selected is the right one.
If you don’t see anything like the above, go through the [steps to load the firmware](http://maslowcommunitygarden.org/Firmware.html?instructions=true) again.
I see that quitting GroundControl and starting it again helped in the instance above, that might work for you as well.
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### Author:  [@Daves-wood-turnings](https://forums.maslowcnc.com/u/Daves-wood-turnings)
#### Post date: [July 7, 2018, 7:07pm UTC](https://forums.maslowcnc.com/t/ground-control-connection-issue/4411/8 "2018-07-07T19:07:53Z")
Blurfi Thanks for that info, New to Arduino, But not CNC. After I posted my request, I did walk away and returned to my shop at 4:30am, And got it running, What I did in my case was to remove the Maslow board then update the Mega 2560. Replaced the Maslow board, hey presto, connection and held it for well over 3 hours. Now all I have to do is finish my frame with the motor’s. Thanks again
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### Author:  [@blurfl](https://forums.maslowcnc.com/u/blurfl)
#### Post date: [July 7, 2018, 7:23pm UTC](https://forums.maslowcnc.com/t/ground-control-connection-issue/4411/9 "2018-07-07T19:23:37Z")
I know what you mean about “walking away”. Sometimes that’s just the right thing to do. I also understand the part about about 4:30 AM, too!
Glad to hear of your success. 👍
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### Author:  [@dlang](https://forums.maslowcnc.com/u/dlang)
#### Post date: [July 28, 2020, 7:21pm UTC](https://forums.maslowcnc.com/t/ground-control-connection-issue/4411/11 "2020-07-28T19:21:40Z")
make sure the arduino software isn’t runing at the same time as GC
try to get a shorter USB cable
try not to route the cable near the power cables
consider switching to WebControl on a Pi with a really short USB cable.
David Lang
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### Author:  [@TomFord](https://forums.maslowcnc.com/u/TomFord)
#### Post date: [July 28, 2020, 7:25pm UTC](https://forums.maslowcnc.com/t/ground-control-connection-issue/4411/12 "2020-07-28T19:25:20Z")
I watched a video online and got it going. The firmware was corrupted. Thanks anyway.
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### Author:  [@Fr4b3lo](https://forums.maslowcnc.com/u/Fr4b3lo)
#### Post date: [August 4, 2020, 12:13pm UTC](https://forums.maslowcnc.com/t/ground-control-connection-issue/4411/13 "2020-08-04T12:13:41Z")
So, i am get a lot of disconnections in arduino. The virtual com lost the address and the GC messages becomes crazy. Only works again when i log out and log on again. Check the firmware and GC version and all its ok. I use linux Debian.
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### Author:  [@Orob](https://forums.maslowcnc.com/u/Orob)
#### Post date: [August 4, 2020, 1:15pm UTC](https://forums.maslowcnc.com/t/ground-control-connection-issue/4411/14 "2020-08-04T13:15:25Z")
It sounds like it could be a usb power issue or a questionable power supply. There were a few batches of power supply capacitors that blew a few years back. I remember the early imac all in one screen pc’s having bad motherboards because the capacitors were counterfeit and blew. Power supplies don’t hit their rated voltage when things get really noisy. I’m not saying that is necessarily it, but as a process of elimination, you might consider trying to isolate power as a variable to verify the arduino doesn’t do the same reboot behavior with a different PC or laptop, then try your debian machine again perhaps with a powered USB hub (connected to your PC) as a way to isolate if it is an over current on the arduino or a brown-out capacitor on the USB.
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### Author:  [@Fr4b3lo](https://forums.maslowcnc.com/u/Fr4b3lo)
#### Post date: [August 6, 2020, 4:16pm UTC](https://forums.maslowcnc.com/t/ground-control-connection-issue/4411/15 "2020-08-06T16:16:31Z")
Ok. I will try buy one hub.