I had the same issue. The problem with ENODEV is, that the sensor cannot be found. The solution that worked for me was:
when creating the BME680 object as described with: “bme = BME680_I2C(i2c=i2c)” use “bme = BME680_I2C(i2c, i2c.scan().pop())” instead.
explanation: I found that in init of class BME680_I2C, the address is set to 0x77 by default, but my sensor´s address is 0x76. Using “i2c.scan()” brings you the actual address and use it as an argument for the new object.

Hi.
Thanks for sharing. I’ll have to try it.
It may be useful for others too.
Regards,
Sara

Sara, as time permits, I have tried to find a solution to the reconnect issue. I have a proposed approach for the ESP32 that seems WAY to complicated.

I run the BME680 server in one thread and a periodic connection test on the second thread. This way, the timer for the connection test is non-blocking. If the gateway (192.168.0.1 in my case) can not be reached a hard reset is sent. I got the basic approach to the non-blocking timer here: https://www.youtube.com/watch?v=9vvobRfFOwk&t=291s

This is pretty crude but it should cover all manner of network ills. Any suggestion on how to improve or simplify this code is appreciated.

https://github.com/bill-orange/MicroPython/tree/main/esp32%20MicroPython%20BME680

Hi.
At the moment, we don’t have a tutorial about how to reconnect to wi-fi using micropython.
But, I think this will help you: https://docs.micropython.org/en/latest/esp8266/tutorial/network_basics.html
Regards,
Sara

Is there a way to add an auto-reconnect function to MicroPython?

Is there any chance to use this C++ library with MicroPython, i.e. call the library functions and get their values? The used calculation seems to be closed source.

I have the same exact issue with CJMCU-680. At first I had a problem:
“NameError: name ‘BME680_I2C’ isn’t defined”
Then I BurnFirmware and now I have a problem like Richard. And usual memory allocating problem on second run and above. It just won’t work.

Make sure you upload the code to your board. You’re probably just “running” the code.
After uploading make sure you press the RST button to restart the board.
Regards,
Sara

What I mean is that it does not work as a stand alone with external power supply.

My aim is to use it in a project using a separate power supply such as battery. However, it does not allow me do that. The script only runs when the board is not disconnected from the IDE.

Thanks