Comments on: MicroPython: BME680 with ESP32 and ESP8266 (Temperature, Humidity, Pressure, Gas)

By: Sara Santos

Sara Santos — Thu, 13 May 2021 18:14:19 +0000

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

By: WILLIAM E WEBB

WILLIAM E WEBB — Thu, 13 May 2021 16:03:47 +0000

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

By: Sara Santos

Sara Santos — Fri, 02 Apr 2021 14:33:12 +0000

In reply to WILLIAM E WEBB.

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

By: WILLIAM E WEBB

WILLIAM E WEBB — Fri, 02 Apr 2021 14:27:28 +0000

This project worked pretty well. However, I do have one problem. If my WiFi network goes away (which it frequently does) the connection is lost and the main.py will not recover. A brief Google on “MicroPython Auto-reconnect” did not reveal a solution. I did see that other people have the same problem with there code.

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

By: Desh

Desh — Sun, 10 Jan 2021 11:51:18 +0000

I’m still running the BME680 with Arduino C++ as I’m using the Bosch BSEC library to get air quality (IAQ), VOC and CO2 (github.com/BoschSensortec/BSEC-Arduino-library). The BSEC library calculates this values by using gas resistance, humidity and temperature (as shown above).

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.

By: Silver

Silver — Tue, 05 Jan 2021 12:44:02 +0000

In reply to richard sauvant.

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.

By: Sara Santos

Sara Santos — Fri, 16 Oct 2020 09:05:21 +0000

In reply to Shehu Bello.

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

By: Shehu Bello

Shehu Bello — Thu, 15 Oct 2020 04:18:09 +0000

In reply to Miloš.

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

By: richard sauvant

richard sauvant — Wed, 14 Oct 2020 21:27:48 +0000

Hello iI try your code but I has a problem
exec(open(‘./testbme680.py’).read(),globals())
Traceback (most recent call last):
File “”, line 1, in
File “”, line 35, in
here >> bme = BME680_I2C(i2c=i2c)
File “bme680.py”, line 217, in init
File “bme680.py”, line 46, in init
File “bme680.py”, line 228, in _write
OSError: [Errno 19] ENODEV
I use this bme680
GY-MCU680V1
https://wiki.liutyi.info/display/ARDUINO/BME680
Do you ave an idea *???
Thank you !

By: Miloš

Miloš — Wed, 14 Oct 2020 11:49:19 +0000

In reply to Ulrich Engel.

BME680 is not CO2 sensor.
It meassure VOC, and from VOC it calculate relative CO2, it is mainly used in controled envierment.
For example if you use it in your room, after 48h burnin process, it will remember average VOC and convert it to 400 ppm CO2.
Basicly, you will need to burn it outside compare your data with some pollution sensor close to you, calculate average per hour and then put those numbers into program and get VOC polution in your space.
Try put it in room where you stock your house chemichals, cleaning stuff etc, you will see jump in results, that will prove that sensor works.
If you want to check CO2 you need dedicated sensor for that, BME680 is not so good for that.
Sorry for spelling.