Hi,
i can’t upload to my nodemcuv2 board even though the usb device is there:
misws-iMac:testapp02 misw$ pio device list
/dev/cu.wchusbserial14340
-------------------------
Hardware ID: USB VID:PID=1A86:7523 LOCATION=20-3.4
Description: USB2.0-Serial
even the serial monitor works.
the platformio.ini is:
[env:nodemcuv2]
platform = espressif8266
board = nodemcuv2
framework = arduino
upload_port = /dev/cu.wchusbserial14320
when i do an upload, the usb device is not available:
instance.open()
File “/Users/misw/.platformio/penv/lib/python2.7/site-packages/serial/serialposix.py”, line 268, in open
raise SerialException(msg.errno, “could not open port {}: {}”.format(self._port, msg))
serial.serialutil.SerialException: [Errno 2] could not open port /dev/cu.wchusbserial14320: [Errno 2] No>such file or directory: ‘/dev/cu.wchusbserial14320’
The port works for the Arduino IDE.
Any suggestions?
Thanks
moik
Addon:
i can upload via this port to an arduino nano with platformio (same chip), so it seems the it is an issue with the nodemcu.
it seems that there is a pio bug:
when i’m creating a sym link from /dev/cu.wchusbserial14320 to /dev/usb01, everything works!
the problem seems to be the dot in cu.wchusbserial14320.
do only i hav ethis issue? i’m on macos mojave.
Can you check what version of the platformio espressif8266 platform package you’re using - you can run pio update -c
to run a check only. If it’s not version 2.2.2, can you run pio update
so that it gets updated, and try again?
Hi pfeerick,
it’s
> Platform Espressif 8266
> --------
> Checking espressif8266 @ 2.2.2 [Up-to-date]
> Checking tool-esptoolpy @ 1.20600.0 [Up-to-date]
> Checking tool-mkspiffs @ 1.200.0 [Up-to-date]
> Checking tool-esptool @ 1.413.0 [Up-to-date]
> Checking framework-arduinoespressif8266 @ 2.20502.0 [Up-to-date]
> Checking toolchain-xtensa @ 2.40802.190218 [Up-to-date]
so everything seems to be ok.
Yes, that’s all good. Thanks 
Just double check that path… the pio device list
output ends 40, but you’ve got 20 in your platformio.ini
…
Ehm, that’s embarrassing 
Will change my nickname.
Thanks pfeerick!
(but i still wonder where that 20 came from, it was all c&p
)
1 Like
lol… no need… I’d be changing mine every second day if that was the case!

Just glad we figured it out… I was thinking that major / annoying a bug couldn’t have been in the pyserial library all this time and not found! 