Stabilize SD Card Recording
Dear OpenBCI Community,
I am currently running a study with the Cyton+Daisy combo, in which participants wear sensors over the course of a workday. To record data continuously, I am writing the recordings to SD cards. The process is simple:
- In the morning, I set up the system using OpenBCI GUI (v. 4.2.0) - i.e. check impedances, etc.
- After setup, I restart the amplifier and the software and start a recording with 24h SD card recording
- Then, I quit the software (without stopping the recording)
- The participants head home afterwards
In some cases the process works well and data is continuously written to the SD card (up to 8 million samples...) that is retrieved in the evening. In other cases (probably 1 of 3 instances), however, the SD card recording fails and only 2000 to 6000 samples are recorded. I tested the SD cards before and determined that they are generally able to record at least 80k samples - and as I said, it mostly works well.
However, I wonder where the volatility is coming from, i.e. why a third of the recordings stop short. Would someone happen to have experiences with this issue? Or perhaps an idea on how I might stabilize the recordings? Could it be "just" an issue of power interruptions (e.g. some participants ride their bikes home while wearing the system - which might cause brief power interruptions)?
Thank you in advance for your feedback!