@tjoseph1 thank you for your reply. the previous problem of not saving data was solved by changing the onion processor.

The same sd card that I use in the onion development kit is not recognized by an onion mounted on a pcb developed by us. you can kindly post the onion 2 s + connection scheme with the sd card slot. We have double checked several times but are unable to resolve the problem

@tjoseph1 said in onion 2s does not save any data:

hi,
my sd card is absent. you think is something about the schematic that misconnects the sd card?

@crispyoz Hello, thanks for the suggestion, but your test gave the following result. no file or folder is saved after the reboot

my custom card with the onion omega 2s cleaned on board does not recognize the sd card. this is the message that appears when i insert the sd with the system on.

@crispyoz
from the output it would seem that the sd card connector is not seen at all

@tjoseph1 hi. WE using our in-house designed board.
The firmware version is 4.3.0.3
At reboot no data no folder no file persist.
the image gives more informations on boot

we've mounted an omega onion 2s+ module on our board . the module look likes work fine but whatever document or folder we create within it is lost at processor reboot. Have you experienced this problem before?
What do you advise us to check? We can't even read the contents of the sd card. does recognize sd card. this way the chip is unusable

thank you for your help. the problem would seem to be installing the numpy library. my application is to recognize a python qr code.
do you think that installing a debian partition and running on sd card can solve the problem? there is another way for you? ( link url)