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Sudden stop in recording

Dear

I tried to sample two days in a row with the configuration below (with fresh batteries and audiomoth 1.9.2), however I noticed that the recordings stopped just after midnight on the second day (+-1230 files) , do you have any idea what could be wrong?

The maximum amount of data was 12GB, so storage wouldn't be the problem.

I was thinking about writing capacity, but then it should have been a problem on the first night as well I guess.

Any idea how I could resolve this?

Between 18:00 and 07:15 at night.

RECORDING

Sample rate 384 kHz

Gain Medium

Enable sleep/record cyclic recording

Sleep duration 5 seconds

Recording duration 55 seconds

FILTERING

Trigger type - Frequency

Window length (samples) - 16

Centre frequency - 63 kHz

Minimum trigger duration 2 seconds

Amplitude threshold of 0.6% will be used when generating T.wav files

15 comments

15 Comments

Alex Rogers

Mar 20

You can run the summary over a copy of the files from the SD card if you have a complete set. It’s really useful to be able to see exactly what files were generated.

If the batteries are okay, it may be the file allocation table on the SD card became full. Make sure you reformat before deployments rather than just deleting the files.

Alex Rogers

Mar 20

Replying to

Yes, in the latest version of the Config App, under the 'Process' menu option.

Jari Vandendriessche

Mar 20

Replying to

I seem to only have the right field actually, but the app says it's up-to-date (version 1.9.1).

Alex Rogers

Mar 20

Replying to

The most up to date version of the Config App is version 1.10.2.

You can download it here: https://www.openacousticdevices.info/applications The 'Summarise AudioMoth Files' option is then under the 'Process' menu option:

Jari Vandendriessche

Mar 20

This is the config:

Device ID : 242DE80564D66BCC

Firmware : AudioMoth-Firmware-Basic (1.9.2)

Time zone : UTC

Sample rate (Hz) : 250000

Gain : Medium

Sleep duration (s) : 5

Recording duration (s) : 55

Active recording periods : 2

Recording period 1 : 00:00 - 07:15 (UTC)

Recording period 2 : 18:00 - 00:00 (UTC)

First recording date : ----------

Last recording date : ----------

Filter : -

Trigger type : Frequency (63.0kHz and window length of 16 samples)

Threshold setting : 0.6%

Minimum trigger duration (s) : 2

Enable LED : Yes

Enable low-voltage cut-off : Yes

Enable battery level indication : Yes

Always require acoustic chime : No

Use daily folder for WAV files : No

Disable 48Hz DC blocking filter : No

Enable energy saver mode : No

Enable low gain range : No

Enable magnetic switch : No

Enable GPS time setting : No

Alex Rogers

Mar 20

Hi Jari, Can you share the CONFIG.TXT file from the SD card, and also use the 'Summarise AudioMoth Files' option under the 'Process' menu to generate a SUMMARY.CSV file that shows the files that were generated? Also, can you confirm the make and model of the SD card and the batteries? Alex

Jari Vandendriessche

Mar 20

Replying to

SD card = Sandisk Extreme 64 GB U3 A2 V30, batteries are Panasonic Pro Power AA-Lr6 (M: 1.5V)

Jari Vandendriessche

Mar 20

Replying to

Well, I already transferred them to a harddrive sadly, in general 1200+ files were generated in the 5-55 configuration, with most 'empty' 44kb and then others with the triggered frequency, but the last few (about three are unable to read and after those, the recordings stop). I'm actually a bit worried about the batteries now as I was planning to sample 6 nights (6*350mah) before battery change, which should be well within the limits of the batteries I thought. Now, at the moment, most voltages display 4.1V or 4.0V after two days.

Jari Vandendriessche

Mar 20

Replying to

Sorry, I was slightly too fast. I'm currently using Philips LongLife AA R6 1.5V, the Panasonics should be the spare ones for another series.