Recording stopped prematurely due to SD card write error
Hello Open Acoustic Devices,
We ran into an issue during one of our 2-week-long deployments where the Audiomoth stopped recording after 2 days despite having enough battery and SD card storage to last 2 weeks. The Audiomoth configuration was at a sampling rate of 192kHz, a 5min ON 5min OFF sleep/cycle scheme for a 24hr recording period.
It was placed within an Audiomoth dev case and the battery connections have been checked. We are using 3 Paleblue D cell rechargeable batteries. And the microSD card is a 256GB Sandisk Extreme UHS Speed Class 3 (U3) microSDHC card. The SD card was reformatted to exFAT before being used.
Below I will attach the SUMMARY.CSV and a picture of the Audiomoth inside the dev case. The Audiomoth was recording (flashing red) at time of deployment and we recovered it a week later under an error mode (green and red flashing). When using a multimeter, the battery voltage was 4.558V at deployment time and it was 4.144V at recovery time.
Since the voltage is high and the SD card write error happens after a day of successful recordings, we were confused as to what the issue was.
Feel free to let us know if you would like any more details!
Thank you for your time, Aditya Krishna
The Dev case is intended for the AudioMoth Dev board which has JST connectors on the back and no battery holder. The board then clips into the case.
If the AudioMoth was doing short red and green flashes when recovered then it sounds like an SD card issue. The AudioMoth experienced five SD card write errors in a row and cancelled the schedule. After the first error, the SD card didn’t actually save any further data for some reason.
Check if the SD card is still writable.