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Deployed 19 AudioMoths units over 8 sites in the southern half of the lower pennisula of Michigan. AudioMoths were deployed the end of February, with batteries and memory cards changed out the end of July and all devices collected the middle of November.

Based on the configuration  they should of lasted ~150 days.

(Sample rate: 48 kHz; Med gain; Enable sleep/record cycle; 00:04:45 sleep duration; 15 sec recording duration; Enable LED; Enable battery level indicator; 24 hrs/7days recording period = Each day will produce 288 files, each 1440kB, totaling 415 MB; Daily energy consumption approx. 19 mAh).

AudioMoths stopped recording after ~30 days (btwn Feb. 24 and March 29) and after ~60 day (btwn July 22 and Sept. 24).

I was using Energizer Ultimate Lithium AA Batteries and Amazon Industrial Alkaline AA batteries with Amazon basics microSD XC1, 64 GB, V30, Class 10, U3, A2.

Batteries were a couple years…

Hi, I'm using AudioMoth Dev with an attached GPS board.

I recorded for about 10 hours (after enabling GPS for time and location setting in the configuration app) and while it produced the WAV files for the whole time, the GPS fixed ("Received GPS fix") only in the first 10 seconds and then was switched off.

Does anyone know what might have caused that to happen? If it managed to fix why should it be switched off?

Perhaps the last three lines in the GPS txt file can help figure this out:

18/11/2025 08:49:52.000 UTC: Time was updated. The internal clock was 81ms fast.

18/11/2025 08:49:52.000 UTC: Actual sample rate will be 15997.206 Hz.

I would like to share some results as a continuation of an earlier post on energy consumption of SD cards at https://www.openacousticdevices.info/support/sd-card-support/u1-vs-u3-microsd-cards-field-data-contradicts-recommendations?origin=notification

We conduct an indoor experiment using Audiomoths with firmware version 1.11.0 in a recording window of 180 minutes. The sample rate is set at 48kHz, and the gain is set at medium. We enable sleep/record cyclic recording. We use daily folders for the generated WAV files. We combined two sets of different recordings and sleep durations with different SD cards and battery models to assess the effect of sleep durations, and the type of card and battery. These are:

Alcaline vs lithium

Lithium batteries do not extend the operating time beyond what alkaline batteries did when the recording schedule was intensive (recording each minute during the 180-minute window). Compare BAU2 vs BAU1.

Recording scheme

I've got 22 new AudioMoth Dev units, and am attempting to configure them using the MacOS app. After setting the switch to Custom, plugging in the Micro SD card, attaching the power cable from the battery pack in the Dev case, and connecting the USB-micro connection to my laptop (via a USB-C to USB-A dongle, which connects the USB-A end of the USB-micro cable), the green LED flashes every second and the red LED stays solid. According to the LED code key, this should not happen with a new AudioMoth unit.

I've tried several different USB-micro cables including one labeled for both charging and data, restarted my laptop, and so on. The LEDs don't change and the configuratoin app time window is greyed-out.

Any thoughts as to what's going wrong?

Hi,

I tried to install Chime on my mobile and got this:

Is there a newer version available for Android?

Thanks,

Dana

I have a handful of new devices and followed instructions to configure.

However, the devices are not recognized by my computer. I tried 3 different USBs, two different audiomoths, many different USB ports, and two different computers. When I plug it in (setting is USB/Off) the green light appears, so it seems something is happening but nothing shows up on my computer. Thanks for your help!

Hi,

I ordered one audiomoth (Labmaker, Germany) May 2025, version 1.2.0,

flashed it with 1.11.0 (can't remember if I had to switch off the USB HID flashing, I think I needed to). This one is working perfectly, recording already for two months now in the field.

End of sept 2025 I ordered 2 extra Audiomoths 1.2.0. Flashed to 1.11.0 (needed to switch off USB HID flashing for both). Configuration with same .config as first one. But for both a lot of electronic noise is heard, the spectrogram shows horizontal lines at 4, 8, 12 kHz and sounds seem to repeat in between. I tried downgrading to 1.10.0, but the problem was the same. What is your advice?

Hi,

Can anyone tell me what i need to change that the moth will start recording immediately without any set time. (only recording period is set once - to limit the filesize) It could name the files like 1.WAV, 2.WAV or so. i dont need a timestamp and the setting of the time only complicates deployment. GPS only needs battery...

The next thing i'd like to know is why this device "looses" its firmware sometimes if the battery is disconnected for some time.

Thanks in advance

Phil

Hi everyone,

when reading the documentation on Github I see that the sampling rate is capped at 192 kHz for use with the dedicated GPS sync FW (https://github.com/OpenAcousticDevices/Application-Notes/blob/master/Using_AudioMoth_GPS_Sync_to_Make_Synchronised_Recordings/Using_AudioMoth_GPS_Sync_to_Make_Synchronised_Recordings.pdf). When I look at the sample SETTINGS.txt (https://github.com/OpenAcousticDevices/Application-Notes/blob/master/Using_AudioMoth_GPS_Sync_to_Make_Synchronised_Recordings/SETTINGS.TXT) provided the parser seem to enforce 125 kHz. I am interested in recording bats and localizing them with synced MicroMoths and I was hoping to use a sampling rate of 384kHz. Is it not possible to sample that high when using the GPS hat?

Best wishes,

Felix