Discovered an SD Card Bug

[me_3e9eb6HB9c]

All,

I recorded a flight earlier today. Opened it on my laptop and renamed the file and left it on the SD card. Then decided to go out for another flight a minute ago and the drone will not connect if the SD card is in. As soon as I eject the card I got a connection. Then inserted the SD card it disconnected.

This therefore would seem to be a bug

Regards

Grant

[501Pete]

I have observed a similar condition to this, and at one stage could replicate it at will.
The Quad was constantly doing a reset of the AP, causing the connection to just come up and immediately go down again.
I eventually tracked it down to, believe it or not, the SD card!
Even though the card was blank (to a file manager) there must have been something in the boot area that was being read at quad system boot.
The AP would come up, the quad connected, bind and then a few seconds later disconnect as the Wifi dropped. This would happen time and time again.
Booting with the card out fixed the issue, but if I put the same blank card in again cold, and then restarted, again the problem would return.
I then booted with no card in the quad, conformed it was all good, and then mounted the SD card when the quad had completed POST etc.. This time the quad performed the SD card speed test on the installed card, confirmed it was good and after that the problem went away.
Whilst I was very sceptical at first of my findings, I could replicate the issue at will by booting with the card in from cold. I believe the issue first started when I did not unmount the card properly from my PC after deleting videos.(The card by the way has never been used for firmware updates, I use separate low capacity cards for that.
I'll try and replicate it again sometime.
I'm pretty sure that (like the 501) the SD card is a shared resource across the camera and the Wifi module. For instance this is how you flash new Wifi firmware on the 501.
I'm hazarding a guess that the wifi module is reading something "peculiar" from the card at boot, maybe setting a flag within the AP settings thus causing the issue.
I wonder if those having issues have tried booting without an SD card and then installing it hot?
I have it on my To Do list to try a few different things to try and replicate it at will.

[me_fa036eEZef]

If the card is empty, try to format it from the hubsan app

[fb_43b9ftbKWM]

I have observed a similar condition to this, and at one stage could replicate it at will.
The Quad was constantly doing a reset of the AP, causing the connection to just come up and immediately go down again.
I eventually tracked it down to, believe it or not, the SD card!
Even though the card was blank (to a file manager) there must have been something in the boot area that was being read at quad system boot.
...

Furthermore, if an SD card gets plugged in a computer running Microsoft Windows (2000 or later), a hidden folder named "System Volume Information" will be created immediately. The folder contains the two files "WPSettings.dat" and "IndexerVolumeGuid".

[me_075d7ydEYr]

Yep the Zino seems to check that the card is OK during startup, otherwise the startup process isn't finishing and you can't get a connection to the remote. Discovered this when I was trying to figure out how a 64GB card should be formatted so that the Zino would recognise it.

[Bellerophon]

This might be an obvious question, but did you format to FAT32? This is what Husan recommends.

[Hubsan-Ailsa]

Hello all,

Whether Putting SD card in the Zino or not has nothing to do with the disconnection issue.

Kindly suggest you format the SD card to FAT32 when you updating the IT firmware.Or which will affect the wifi connection