I'm trying to record to micro SD on the Cyton, but getting odd results. Sometimes the file looks fine and follows the spec here (https://docs.openbci.com/Cyton/CytonSDCard/#data-logging-format). But

I appreciate the tips on trying to avoid the dropouts, but it's not really possible in my situation. The Pi/dongle is already pretty close to the bedroom door, and there are just times when I need to

So I'm currently focusing on an approach that writes to the SD card instead.

focusing on an approach that writes to the SD card instead. This is raising its own separate problems, in that I'm not reliably getting data files written for the expected period - but I'll raise th

Yesterday i bough new sd card (sandisk extreme 32GB U3 A1) and formatted it as usual. Then i've started recording and in the morning got result as in first post. Since that was freshly formatted new s

2) According to the documentation, measurements are stored with 250Hz on the SD card, but only averages of pairs of two samples per channel are transmitted via radio due to limited bandwith. We use LS

https://github.com/roflecopter/OpenBCI_Cyton_Library_SD [custom firmware]

Is it a recording coming from the SD card at Gain X8 ?

by default. I believe that is the case for the SD card conversion: the ADU value (arbitrary unit from the analog to digital converter) is by default divided by 24 and converted to microV, but this fo

sf etc) and run it. it will start session to sd without streaming and do not require dealing with GUI. When recording is finished just turn off device, pull out sd card and insert it to laptop, open

Hi Max, Thanks for the firmware. I will update it on one of our device for testing. I was wondering if your firmware writes external trigger values as well? and personally how do you convert the sd ca

Thanks Max. Our devices had empty files more often, happening approximately 40% of the time. At the moment, we've opted out of using SD cards because data loss isn't something we're willing to risk. H

I had also a rare (once a 50-60 recordings) issue with sd cards, you can check it here https://openbci.com/forum/index.php?p=/discussion/3775/sd-card-file-is-empty/

1) Here is firmware I've made for OpenBCI Cyton (recently i got Daisy and it also works fine) to write to SD with sample frequency more than 250Hz (500 - 1000Hz is working fine) and with flashing LED

Since the Cyton to dongle connection seems to be part of the problem would it be advisable to save the data directly to an SD card in the Cyton?

Since the Cyton to dongle connection seems to be part of the problem would it be advisable to save the data directly to an SD card in the Cyton?

About 2.5 months have past and issue happened again once. I'm not sure, but may issue is that single night generates ~2.5GB file each time (due to 8 ch and sf=500Hz) and 32GB card should be reformatte

Please email customer service: (contact at openbci.com). Are the failures happening on both units? If so then it seems less likely this is a hardware failure. Are you using the recommended cards?

We've encountered challenges with the Cyton Daisy SD card files. In two separate experiments utilizing pairs of Cyton Daisy devices, data is recorded onto SD cards. One problem we've noticed is that s

I came across an SD card recording and saw values as 800000, as of now I am not sure on what settings the data was collected, but I am sure that it was for all 8 channels.