Unfortunately, you can not connect to the two devices. I have tried a lot with more arduino, GRBL 0.9 and GRBL1.1. With USB connection, LaserGRBL works flawlessly. For wifi connection at Arduino, only ...

It's of course backwards compatible with existing Arduino add-ons, but sets itself apart with a new USB controller with lower latency and driver-free operation on Mac and Linux.

The UnexpectedReset evidence that your grbl on arduino perform a self reset, sending an unexpected "Welcome Message" (Grbl X.Xx ['$' for help]) that LaserGRBL receive and signal to you with the issue ...