I have looked all over for a related topic so please forgive me if i overlooked it. I installed 1.5.2 yesterday and everything is fine but now today ,y machine will not connect. I imported the settings from 1.4.12 yesterday as well but all i get is Connecting…
and a white light on the SLB. im using the defaults for all that so not sure what to change
@Opiate1 When you say that you imported the 1.4.12 settings, what did you do?
Are you connecting using usb or ethernet?
Another user who had this issue mentioned that when they checked Config → Baud rate it was set to 0, so maybe check there?
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Im connecting using USB. I bypassed my USB hub and it seemed to have fixed it, Other than sometimes if the machine is on before i open Gsender it wont connect. I have to turn the SLB on after I have Gsender open?
It shouldn’t matter whether you turn it on before or after you have gSender open, just move the mouse off and back into the connection area to refresh it and have your machine appear 
Definitely I would recommend you don’t connect to your CNC through a USB hub, these can commonly cause connection reliability issues so we always recommend a direct connection
Then there that. When i put my mouse over the connection area, nothing happens. so i have to close Gsender then it connects on the 2nd or 3rd try. I also get a Error 1 Expected command letter.
We made some connection updated in 1.5.3, perhaps your issue might be resolved now?