Easel won't connect to Arduino GRBL CNC machine via Bluetooth

Can Easel send to a bluetooth USB port? Easel doesn’t connect to my GRBL CNC machine. I have an HC06 bluetooth module on my GRBL CNC. Arduino serial monitor connects perfectly to it, and I can home it, and move all 3 axes. The connected bluetooth shows up in a list of available USB ports. Arduino serial monitor also works perfectly with the CNC via an actual USB cable. Any ideas?