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 unable to flash micropython to esp 32: open serial error
#1
dear community

issue: unable to flash micropython to esp 32: open serial error, please try again. hope to connect internet and try again.

pretty new to micropython - want to flash micropython to esp 32 ( resp 8266) board.

cf this docs: https://maker.pro/esp8266/tutorial/using...h-upycraft

getting this errors all the time.

open serial error, please try again.
hope to connect internet and try again.
current version only open py txt json ini file.
hope to connect internet and try again.
hope to connect internet and try again.

any idea;

many thanks for any and all help in advance.


i run Win 7


the hardware:

a. Joy-IT-Node MCU ESP8266

.. and besides that i also tried it with the following

b. ESP32-T Development Board CP2102 mit Espressif ESP-WROOM-32 IoT WLAN & BLE Modul


i have installed the > CP210x_Universal_Windows_Driver.zip


by the way: i could try to do all that on a linux machine.

Wordpress-development - a Toolset: wpgear.org
Quote
#2
hello dear community, 

the issue: flashing MicroPython to ESP32 with ESP-Tool.py  does not work 


issue:
unable to flash micropython to esp 32: open serial error, please try again. hope to connect internet and try again.
pretty new to micropython - want to flash micropython to esp 32 ( resp 8266) board.
cf this docs: https://maker.pro/esp8266/tutorial/using...h-upycraft
 
getting this errors all the time.

open serial error, please try again.
hope to connect internet and try again.
current version only open py txt json ini file.
hope to connect internet and try again.
hope to connect internet and try again.

any idea;


update: - tried it with the so called esp-tool: 

took this tool - here https://github.com/espressif/esptool

Quote:It works on Windows, Mac OS X, and Linux. For the official documentation, you can visit the esptool.py GitHub page.
Finding the Serial Port Name
Connect your board to your computer.
Open the Arduino IDE.

Go to Tools > Port.
Save your ESP8266 serial port name (in our case it's COM4)
Close your Arduino IDE software.

cf: https://randomnerdtutorials.com/flashing...2-esp8266/

[quote]Installing esptool.py in your computer
To work with esptool.py, you’ll need either Python 2.7, Python 3.4 or a newer Python installation on your system. We recommend using Python 3.7.X, so go to Python’s website and install it in your computer.
With Python 3 installed, open a Terminal window and install the latest stable esptool.py release with pip:
pip install esptool


Microsoft Windows [Version 6.1.7601]
Copyright (c) 2009 Microsoft Corporation. Alle Rechte vorbehalten.
[code]
C:\Users\Kasper>pip install esptool
Collecting esptool
  Downloading https://files.pythonhosted.org/packages/6c/bf/578443af2270ebeff78f
dfd30cef3a02433cc63b34a912936653a48526dd/esptool-2.7.tar.gz (83kB)
    100% |████████████████████████████████| 92kB 1.7MB/s
Collecting pyserial>=3.0 (from esptool)
  Downloading https://files.pythonhosted.org/packages/0d/e4/2a744dd9e3be04a0c090
7414e2a01a7c88bb3915cbe3c8cc06e209f59c30/pyserial-3.4-py2.py3-none-any.whl (193k
B)
    100% |████████████████████████████████| 194kB 4.3MB/s
Collecting pyaes (from esptool)
  Downloading https://files.pythonhosted.org/packages/44/66/2c17bae31c9066137957
11fc78045c285048168919ace2220daa372c7d72/pyaes-1.6.1.tar.gz
Collecting ecdsa (from esptool)
  Downloading https://files.pythonhosted.org/packages/23/a8/8aa68e70959e1287da91
54e5164bb8bd5dd7025e41ae54e8d177b8d165c9/ecdsa-0.13.2-py2.py3-none-any.whl (59kB
)
    100% |████████████████████████████████| 61kB 7.7MB/s
Installing collected packages: pyserial, pyaes, ecdsa, esptool
Could not install packages due to an EnvironmentError: [WinError 5] Zugriff verw
eigert: 'c:\\program files\\python37\\Lib\\site-packages\\pyserial-3.4.dist-info
'
Consider using the `--user` option or check the permissions.

You are using pip version 10.0.1, however version 19.2.3 is available.
You should consider upgrading via the 'python -m pip install --upgrade pip' comm
and.

C:\Users\Kasper>

run into user permission issues i guess ... 

allways thought that i have admin-rights on this machine!?

any idea
Larz60+ wrote Sep-16-2019, 11:09 AM:
do not double post. It's against forum rules: https://python-forum.io/misc.php?action=help&hid=22

Wordpress-development - a Toolset: wpgear.org
Quote
#3
update:  finally were have moved one big big step forwards





 well we had three options  


this way - with the using-micropython-on-an-esp8266-with-upycraft

https://maker.pro/esp8266/tutorial/using...h-upycraft


this way: esp_tool via github 
https://github.com/espressif/esptool/blo...esptool.py


and this way Learn to use MicroPython on a NodeMCU ESP8266 through uPyCraft with an LED sample code.
https://maker.pro/esp8266/tutorial/using...h-upycraft


reports here: https://forum.micropython.org/viewtopic....462#p39462


finally it worked with this one we have had sucess ESP8266-Flasher :: ESP-IDF
http://www.dietrich-kindermann.de/esp_flashtool.html
https://pypi.org/project/wxPython/#files


it was working like a charme 


we took this esp: (and i see that this is the wrong one - ) 


C:\Users\Kasper\Downloads\esp32spiram-20190913-v1.11-312-g22099ab88.bin

Connecting....
Detecting chip type... ESP8266
Chip is ESP8266EX
Uploading stub...
Running stub...
Stub running...
Configuring flash size...
Auto-detected Flash size: 4MB
Erasing flash (this may take a while)...
Chip erase completed successfully in 13.2s
Flash params set to 0x0040
Compressed 1281760 bytes to 785761...
Wrote 1281760 bytes (785761 compressed) at 0x00000000 in 70.7 seconds (effective 145.1 kbit/s)...
Hash of data verified.

Leaving...

Done.
note i will have to try another than this esp: (and i see that this is the wrong one - ) 

C:\Users\Kasper\Downloads\esp32spiram-20190913-v1.11-312-g22099ab88.bin




i will try out later the week and will come back and report all the findings. 



have a great day 



note - i am so lucky that i have had a little success

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