Arduino MKR1000

Select your board type and port
You'll need to select the entry in the Tools > Board menu that corresponds to your Arduino or Genuino board.
Select the serial device of the board from the Tools | Serial Port menu. This is likely to be COM3 or higher
(COM1 and COM2 are usually reserved for hardware serial ports). To find out, you can disconnect your board
and re-open the menu; the entry that disappears should be the Arduino or Genuino board. Reconnect the
board and select that serial port.