Provision the virtual machine:
vagrant up
Shutdown the VM:
vagrant halt
Go into virtualbox and select the VM esp32-micropython-vagrant..., then goto
Settings->USB click add new USB filter then select option Silicon Labs CP2102 USB to UART Bridge Controller....
If that option is not available make sure you have the driver installed: see Adafruit's instructions.
Then edit the filter, changing name to ESP32 and deleting all fields except Vendor ID and Product ID.
vagrant up
vagrant ssh
cd open-eio/micropython-esp32/esp32
make erase
make deploy
Note that it is necessary to halt the VM in order to reobtain the USB device in the host environment:
exit
vagrant halt
For example, on linux:
screen /dev/ttyUSB0 115200
Hit keystroke <ctrl-d>
Then you should see output similar to this:
>>>
PYB: soft reboot
could not open file 'boot.py' for reading
could not open file 'main.py' for reading
MicroPython v1.8.6-649-g22c2ed7 on 2017-03-14; ESP32 module with ESP32
Type "help()" for more information.
>>>