espruino cli not finding COM ports?

[espruino-discuss]

Posted at 2021-04-01 by Seganku

I am trying to get VS Code working with Espruino via https://www.espruino.com/Typescript+and+Visual+Studio+Code+IDE

But I've been running into a bit of a hiccup, where it doesn't want to open the COM port (COM7 in this case). Different apps can all open the COM port, individually of course, not all at once!

This is what VS Code is saying after a Ctrl+Shift+B => 'build', then a Ctrl+Shift+B => 'espruino-console':

[19:23:47] Starting 'espruino-console'...
Espruino Command-line Tool 0.0.36
-----------------------------------

Explicit board JSON supplied: "ESP32"
Connecting to 'COM7'
Port "COM7" not found
Unable to connect!
[19:23:48] Finished 'espruino-console' after 1.7 s

Terminal will be reused by tasks, press any key to close it.

Possibly related, it appears that espruino-cli maybe isn't seeing COM ports?

PS C:\Users\seganku\git\espruino-ts-quickstart> espruino.cmd --list
Espruino Command-line Tool 0.1.38
-----------------------------------

undefined:55
    } else throw err;
           ^

Error: LIBUSB_ERROR_NOT_SUPPORTED
    at Device.usb.Device.open (C:\Users\seganku\AppData\Roaming\npm\node_modules\espruino\node_modules\usb\usb.js:38:7)
    at BluetoothHciSocket.bindUser (C:\Users\seganku\AppData\Roaming\npm\node_modules\espruino\node_modules\@abandonware\bluetooth-hci-socket\lib\usb.js:94:19)
    at BluetoothHciSocket.bindRaw (C:\Users\seganku\AppData\Roaming\npm\node_modules\espruino\node_modules\@abandonware\bluetooth-hci-socket\lib\usb.js:47:8)
    at Hci.init (C:\Users\seganku\AppData\Roaming\npm\node_modules\espruino\node_modules\@abandonware\noble\lib\hci-socket\hci.js:120:18)
    at NobleBindings.init (C:\Users\seganku\AppData\Roaming\npm\node_modules\espruino\node_modules\@abandonware\noble\lib\hci-socket\bindings.js:93:13)
    at C:\Users\seganku\AppData\Roaming\npm\node_modules\espruino\node_modules\@abandonware\noble\lib\noble.js:61:24
    at processTicksAndRejections (internal/process/task_queues.js:75:11) {
  errno: -12
}

I'll look at this more tomorrow, but my brain is about toast for the evening.

Thanks!
-Seganku

[espruino-discuss]

Posted at 2021-04-02 by Seganku

Ah, https://www.npmjs.com/package/usb:

Windows Use Zadig to install the WinUSB driver for your USB device.
Otherwise you will get LIBUSB_ERROR_NOT_SUPPORTED when attempting to
open devices.

(which I found when trying to figure out why espruino --list finds no ports in Ubuntu either)

---

Posted at 2021-04-06 by @gfwilliams

espruino --list finds no ports in Ubuntu either

In that case you need the setcap command to give it permissions.

Odd about the COM ports on Windows though - maybe try espruino.cmd --list --verbose and see if it gives you any hints about why the serialport library isn't working?