Esp8266 based board has not enough RAM to load the module

[Cinmay2014]

When I tried from max30102 import MAX30102, always got importError: no module named 'max30102.MAX30102'
dir as below:
lib
-max30102
--circular_buffer.py
--init.py
I also tried from max30102.init import MAX30102, got another error:
Traceback(most recent call last):
File"", line1, in
MemoryError: memory allocation failed,allocating 416 bytes

Please help me.

[n-elia]

Hi,
which board are you using? And which tools are you using to copy the files on it?
You can also attach some screenshots if you want.
Also, post the code you're trying to execute, please!

[Cinmay2014]

Thanks for your quick reply.
I am using esp8266
And installed the driver as Thonny IDE plug-in, I also tried to install it directly to the board, and got the same issue.

from max30102 import MAX30102
Traceback (most recent call last):
File "", line 1, in
ImportError: no module named 'max30102'

[n-elia]

Hi,
did you install the latest (v0.4.1) version?
Are you absolutely sure that the files have been correctly written onto non-volatile memory? It seems like it cannot find the file.

May you provide a wifi internet connection to your board? If so, can you try the example suggested in the readme here ?

[Cinmay2014]

Yes, I installed the latest version.
I tried the manual way and got a memory error.
I will try the wifi-enable method and let you know the result.

[n-elia]

Ok, try that way.

Remember to reset the board (Ctrl-D in Thonny) and let it run boot.py and main.py, do not play your scripts directly from Thonny.

The online installation works fine, so if you will get the memory error, then it means that you have not enough RAM on your board to run this driver, and you could try to precompile or frozen the driver or try to write a lighter one on your own.

Let me know what happens!

[Cinmay2014]

Tried it and got the error:

Trying to connect to the Internet to download the module.
network config: ('192.168.1.216', '255.255.255.0', '192.168.1.1', '192.168.1.98')
Installing to: /lib/
Error installing 'micropython-max30102': memory allocation failed, allocating 15685 bytes, packages may be partially installed

Can you tell me how to frozen the driver?

[scascor]

i tried the“upip install”，still failed 。
maybe you can try “mpy-cross”。https://github.com/micropython/micropython/tree/master/mpy-cross。 put the "*.mpy" file into the esp8266, then you can use it. try！

[n-elia]

i tried the“upip install”，still failed 。 maybe you can try “mpy-cross”。https://github.com/micropython/micropython/tree/master/mpy-cross。 put the "*.mpy" file into the esp8266, then you can use it. try！

Thanks for your detailed answer!
The link is somehow broken. Here is a working one: mpy-cross .

[n-elia]

Hi,
Then your board has not enough RAM to load the library.
Take a look here for instructions on freezing modules.

Edit: I converted this into a discussion, since it's not a library issue. Let me know if you will be able to successfully freeze the module!

[scascor]

get a same error.

[n-elia]

Hi, unfortunately it appears that your board does not have enough RAM memory to properly load this module. You can either try to freeze the library, as suggested in the previous messages, or to change board (e.g. you could use an ESP8266 with more RAM memory or an ESP32).

[scascor]

i have fixed the issue with “freeze the library”。 thanks。

[n-elia]

i have fixed the issue with “freeze the library”。 thanks。

I am very happy that it worked! Thank you for sharing the solution with the community!

[n-elia]

Hey guys,

here you can find a thorough explanation about this issue and how to overcome it.

Cheers!