"esp8266RTOS\1.0.3/tools/createPreproc.py", line 7 print(f"preCompile Build Path: {build_path}", file=sys.stderr)

[gunt2551]

Environment

• Development Kit: ESP8266 wemos d1 mini pro
• IDF version : 1.0.3
• Development Env: Arduino IDE 1.8.19
• Operating System: Windows 11
• Power Supply: USB

Problem Description

When i verifying code(your example code on github) I got an error. I am unsure the "build_path" needs to be set at "Environment Variables" or is already set up on your code. where can i find the path?

I also tried with version 1.0.2 ,but I got the same error.

If this issue needs to be discussed on your community forum, please let me know.

File "C:\Users\user\AppData\Local\Arduino15\packages\esp8266RTOS\hardware\esp8266RTOS\1.0.3/tools/createPreproc.py", line 7
print(f"preCompile Build Path: {build_path}", file=sys.stderr)
.....................................................................................^
SyntaxError: invalid syntax
exit status 1
Error compiling for board ESP8266 Module.

[alexCajas]

Hi @gunt2551, after examining ther error message, I believe that the issue originates from your python version. Currently, I'm using 3.7.4. Normaly It woldn't be a problem, but sometimes there can be issues with backward compatibility. Could you try with this version and comment here if the problem persists?

[gunt2551]

Thx @alexCajas. After changing the default Python version 2.7.18 called by "python" in the command line to 3.7.4 or 3.12.3, these versions can now run in the MSYS2 terminal. (Now, i use python 3.7.4 that the @alexCajas suggested me)

And when it runs in terminal, I need to fix the path from backslash (\) to forward slash (/) in the file that displayed the path in terminal before flashing (this process I need to do everytime when run the code)

and then it can flash successfully

This is for anyone who encountered the error.

raise SerialException("could not open port {!r}: {!r}".format(self.portstr,ctypes.WinError()))
serial.serialutil.SerialException: could not open port 'COM7': WindowsError(5, 'Access is denied.')
esptool.py failed with exit code 1

Close the Serial monitor and then run it again