<![CDATA[the inserted sd card is not recognized]]>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

]]>http://community.onion.io/topic/4288/the-inserted-sd-card-is-not-recognizedRSS for NodeSat, 08 Aug 2026 03:52:11 GMTWed, 30 Sep 2020 09:11:29 GMT60<![CDATA[Reply to the inserted sd card is not recognized on Wed, 30 Sep 2020 09:11:29 GMT]]>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

]]>http://community.onion.io/post/22581http://community.onion.io/post/22581Wed, 30 Sep 2020 09:11:29 GMT<![CDATA[Reply to the inserted sd card is not recognized on Wed, 30 Sep 2020 12:17:03 GMT]]>@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.

  1. The standard SD card interface
    0.SDCardPinout.png

As you can see, there are 8 wires required

  1. An SD card adapter that I use (the BIGGER pads makes it easy to solder)
    1.Front+Back.png

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..

]]>http://community.onion.io/post/22583http://community.onion.io/post/22583Wed, 30 Sep 2020 12:17:03 GMT<![CDATA[Reply to the inserted sd card is not recognized on Wed, 30 Sep 2020 12:35:00 GMT]]>@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.

]]>http://community.onion.io/post/22584http://community.onion.io/post/22584Wed, 30 Sep 2020 12:35:00 GMT<![CDATA[Reply to the inserted sd card is not recognized on Thu, 01 Oct 2020 08:42:53 GMT]]>@tjoseph1 thank you for your reply. the previous problem of not saving data was solved by changing the onion processor.

]]>http://community.onion.io/post/22587http://community.onion.io/post/22587Thu, 01 Oct 2020 08:42:53 GMT<![CDATA[Reply to the inserted sd card is not recognized on Thu, 01 Oct 2020 11:10:44 GMT]]>@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..

]]>http://community.onion.io/post/22589http://community.onion.io/post/22589Thu, 01 Oct 2020 11:10:44 GMT