No Pycom board found - Silicon Laboratories
Just for the record:
I have an esp32 board, flashed it with Micropython but couldn't connect with pymakr with Win10. Fault message 'No Pycom board found'
Solution: look in the device manager, manufacturer of the com port. In my case it was 'Silicon Laboratories'. Add that to global settings and auto connect works.
"Microchip Technology, Inc.",