the inserted sd card is not recognized

evelina

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

@evelina :
This was already reported here?:
https://community.onion.io/topic/4279/onion-2s-does-not-save-any-data?_=1601466555447&lang=en-GB

I guess you have followed @crispyoz 's recommendation to check custom pcb's circuit with the reference available at:
https://github.com/OnionIoT/Omega2/blob/master/Schematics/Omega2S-Reference-Schematic.pdf

There was another problem reported in the above thread, that files that you created were vanishing after reboot. Were you able to save your files properly after following @György-Farkas 's advice?

Pls post the outcome..

Coming back to this thread, "the inserted sd card is not recognized", I have TWO images for you.

The standard SD card interface

As you can see, there are 8 wires required

An SD card adapter that I use (the BIGGER pads makes it easy to solder)

Please get an adapter, solder the wires and connect your custom pcb, making sure that you follow connection provided in the above PDF. This would simplify the debugging.

Thanks..

crispyoz

@evelina post the relevant portion of your schematic. There is no underlying issue with Omega2S+, I have 200+ devices in production all of which use sdcard to store sqlite3 database.

evelina

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

tjoseph1

@evelina :
<<
previous problem of not saving data was solved by changing the onion processor.
<<

Did you try following @György-Farkas 's advise to recover the Omega2s
by flashing the firmware again, in your previous thread?

<<
cd /tmp
wget http://repo.onioniot.com.s3.amazonaws.com/omega2/images/omega2p-v0.3.2-b239.bin

Check the downloaded file:
md5sum omega2p-v0.3.2-b233.bin
45d6b0be4eb3fb4a0396f417c087d838 omega2p-v0.3.2-b239.bin

sysupgrade -n omega2p-v0.3.2-b239.bin
<<
Didn't the above instructions solve "file missing problem" ?

I am watching the difficulties you report, since I may also face the similar problems later.

As @crispyoz asked yesterday, please post the relevant portion of your schematic that shows Omega2s to the SD card reader wiring.

Thanks..