No Chance to wake up controller after sleep

[Guenni75]

Version

2.1.12

Hardware / Firmware

GRBL 1.1

What happened

Hi.
If i send $SLP to the controller, it goes into sleep. Ok

But I can't wake him up again!
All Buttons are Grey.
If i restart UGS I can't even get connected again.
UGS is fetching the status, shows
<SLEEP|....
Fetching device Version
$I
Connection closed

After that, I have to use bCNC to wake up the controller.
There i can click Reset and everything works again.

How to reproduce

No response

Operating System

Win 10

Anything else

The problem is the closed connection.
I can't send any commands to the controller with UGS.

[breiler]

How do you wake up a controller that is in sleep state??

[Guenni75]

I use bCNC. I couldn't find any other way. Joacim Breiler ***@***.***> schrieb am Do., 15. Mai 2025, 11:02:

…

*breiler* left a comment (winder/Universal-G-Code-Sender#2789) <#2789 (comment)> How do you wake up a controller that is in sleep state?? — Reply to this email directly, view it on GitHub <#2789 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ADR2BUJCYOYV2YEBWVLGG4T26RJ3BAVCNFSM6AAAAAB5FOTZQGVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZDQOBTGA4TKMZVGI> . You are receiving this because you authored the thread.Message ID: ***@***.***>

[Guenni75]

I don't know how the software does that.

[breiler]

According to the GRBL documentation you need to reset the controller. Isn't that button enabled?

[Guenni75]

I never had a Button connected to the reset pin on the controller.

I just click on the reset button from bCNC and it wakes up.

[Guenni75]

The bigger problem is that UGS closes the connection if the controller is in sleep mode!!

You can do nothing, without a connection!!

[breiler]

I adjusted the button for resetting the controller to be available in SLEEP mode.

This is available in the latest nightly build:
https://github.com/winder/Universal-G-Code-Sender?tab=readme-ov-file#downloads

[Guenni75]

Solves this the disconnection when in sleep mode?

When the controller is in sleep mode, UGS closes the connection immediately after connecting.

[breiler]

I did not encounter that problem on my machine. If that still happens for you with the new version I need the response from the $I command to know exactly which firmware your are running.

[Guenni75]

The problem appears, if you set the controller in sleep and then restart UGS or restart the computer. Then after connecting to the controller, UGS closes immediately the connection. Joacim Breiler ***@***.***> schrieb am Fr., 16. Mai 2025, 22:35:

…

*breiler* left a comment (winder/Universal-G-Code-Sender#2789) <#2789 (comment)> I did not encounter that problem on my machine. If that still happens for you with the new version I need the response from the $I command to know exactly which firmware your are running. — Reply to this email directly, view it on GitHub <#2789 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ADR2BUIHBTBGCR5PYKR5CET26ZDZPAVCNFSM6AAAAAB5FOTZQGVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZDQOBXGYZTCMJQGI> . You are receiving this because you authored the thread.Message ID: ***@***.***>

[breiler]

And the output of $I?

[breiler]

I finally found the problem, if you had told me the output of $I this would have been a lot quicker to resolve.

I connected with a newer 32-bit board which does not reset when connecting to it as the older 8-bit systems does.

UGS tries to establish a connection without resetting it, but the sleep mode will prevent it from responding to commands. The work around is that UGS will now automatically reset the controller if it is in a sleep state.

[Guenni75]

I work shifts and can't deal with this every day.

I will give it a try later.