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Nora Talia Boraso
Nora Talia Boraso

Audiomoth cutting short

Hi.

I'm having problems with my audiomoth. The recordings cut short after two days, when it should have lasted more.

Batteries are Amazon https://www.amazon.it/dp/B07NWVWKRG?ref=ppx_yo2ov_dt_b_fed_asin_title, and the SD is https://www.amazon.it/dp/B0FCZTYSN6?ref=ppx_yo2ov_dt_b_fed_asin_title.

Here's the summary file, what happened?


13 Views
Alex Rogers
Alex Rogers
10 hours ago

I would deploy on your desk again with a freshly reformatted SD card and see what happens.

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Time displaying incorrectly.

I'm trying to set up my AudioMoth, but it doesn't display the correct time and I can't manually set it. The time now is 17.29, but the app says it's 01:48 UTC +1

I have installed Chime which does show the correct time, but I can't see where to enable Chime in the configuration.

Can someone please advise?

52 Views
Alex Rogers
Alex Rogers
2 days ago

Hi,


The Config App is showing you the current time on the AudioMoth that is plugged in. This one has been powered for 44 minutes and 36 seconds, and you are in timezone UTC+1, so the time is appearing as 01:44:36 01/01/1970 UTC+1. When you press 'Configure AudioMoth' it will send the current configuration to the AudioMoth and also set the time. You will see the displayed time will update to the current time.

If you remove the batteries at any time, the configuration will still be saved, but the time will be lost. If you switch to CUSTOM without having set the time, the AudioMoth will show a constant red LED and a flashing green LED whilst it listens for the acoustic chime.


There are some quick-start guides here: https://www.openacousticdevices.info/setup-guide Alex

Edytowane

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Machteld Verzijden
Machteld Verzijden

Error when updating to latest software + recordings faulty when used with older version

I recently bought 10 audiomoths, and 9 of them work perfectly, but there is one unit that is not able to update to the latest software.

I get an error message, see attached image.


When I tested it using the version of software that it came with (1.10.1), I can configure it, it will record at the right times, but the recordings are faulty (it almost sounds like the soundfiles are backwards).


Is there any options in the AudioMoth Flash App that I can try to reinstall the audiomoth?


Thanks in advance for any advice,

Machteld


66 Views
Alex Rogers
Alex Rogers
2 days ago

Hi Machteld,


I think this AudioMoth has a bad external SRAM chip. Can you share one of the WAV files. You will be able to flash it if you deselect 'Use USB HID flashing' in the Flash App menu. However, the sound will still be distorted. You would be able to use this device as an AudioMoth USB Microphone as that firmware does not use the external SRAM chip. However, if you contact the seller, they should replace it for you.


Alex


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Thejas Manoj
Thejas Manoj

Persistent 17 kHz tonal line

During annotation for a passive acoustic monitoring project in India, I noticed that recordings from one particular site consistently show a narrow tonal line at approximately 17 kHz across most files. It appears as an almost constant horizontal band in the spectrogram rather than a biological call.

The recorder used here was not deployed at any other site, so I can't compare it against itself elsewhere.


Has anyone come across something like this before? Any idea what it could be? Hardware artefact, power supply noise, or something environmental?


Attaching a screenshot of the spectrogram for reference.


Thanks!



86 Views
Alex Rogers
Alex Rogers
4 days ago

Hi Thejas,

It looks like SD card write noise. Can you share the original WAV file. What make and model of SD card and batteries are you using? Alex

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Mike Taylor
Mike Taylor

Audiomoth records static after Gore vent ruptured

I recently purchased two Audiomoths with IPX7 cases. Each was deployed about 8 meters above the ground on extension poles. They are in open areas exposed to occasional high wind and rain. They are about 500 meters or so apart.


When changing batteries a few days ago, I noticed the Gore vent in one case was ruptured. I don't know exactly when the vent was ruptured. I brought home the audiomoth and case to replace the vent. I also looked at the recorded files. The files recorded as expected in terms of names, timing, etc.


However, each file contains primarily static. Animal sounds can sometimes be heard through the static, but static dominants and renders the recordings useless.


I placed the Audiomoth in a sealed ziptop bag with dessicant bags for three days. I then made a test recording by switching on the Audiomoth to the default setting. The test…



108 Views
Alex Rogers
Alex Rogers
6 days ago

Hi, Yes, it sounds like the microphone has succummed to water damage. You should be able to see when it happened by checking the earlier recordings. It is possible to replace the microphone - it is a Knowles SPU0410LR5H - but requires a hot air rework station, rather than a soldering iron. Contact andy@openacousticdevices.info. Alex

Edytowane

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David Kazdan
David Kazdan

GPS hat problems?

Is there any possibility that a bad batch of GPS hats were shipped? I bought three; one powered up with appropriate LED flashes for one programming/recording cycle, then failed. The other two do not power up at all. I checked my soldering and the voltage at the supply pads, everything looks good.


Note that I am well experienced with that particular GPS receiver, the CDtop PA1616S, in other settings and forms, especially the Adafruit Ultimate GPS version. I had not used it in the form of the Audiomoth GPS hat before. PA1616S


The recorders themselves are very nice, thank you for supplying them.


David Kazdan

Case Western Reserve University

Department of Electrical Engineering

90 Views
David Kazdan
David Kazdan
yesterday

Good catch--but it's still balking on the first "2" here:


firstRecordingDate: "27/04/2026", 01/01/1970 00:03:31: Failed to parse SETTINGS.TXT file after reading character '2' at line 50 and position 29.

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Robert Arnold
Robert Arnold

Water damage to Audiomoth 1.2.0

Is there a pcb layout and circuit diagram available for this. Which are the vulnerable parts. It has no LEDs and is not recognised by the configuartion app.

Thanks

Robert

76 Views
Alex Rogers
Alex Rogers
6 days ago

No, I’m afraid the circuit diagram for AudioMoth 1.2.0 is not available.

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Martin Predavec
Martin Predavec

Recordings just stop

Hello. I have a new AudioMoth that I am trialling before putting out in the field. I am using a SanDisk Extreme and Duracell Optimum batteries. Each time I start recording (switching to Custom), I get the device recording and saving files and then it simply stops recording. Both LEDs flash suggesting a recording error. I have formatted the SD Card and also run a write/read test on it (all good). The length of time before stopping seems to be between 1 and 6 hours.

I've attached the config file, the recording file summary from the last test, and the SD card RW results.

Any suggestions would be greatly appreciated.

Thank you,

Martin


139 Views

Hi Martin,


This is quite strange. I can’t see anything wrong. Is the SD card formatted to FAT32 or exFAT?


An SD card write issue during a recording normally leaves a short file with no data but a valid header. If these aren’t present it means the error occurred when trying to power on the DD card or open the file. After five failures the recording schedule is cancel to preserve the contents of the SD card.


Where did this AudioMoth come from?


Alex

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Nora
Nora

Audiomoth chime app with wrong time

Hi, I'm having issues with the Chime app. As you are seeing it displays the wrong time (it's different fron the device). There's no way to edit it. I can't correctly chime the audiomoths this way.

126 Views

Hi Nora, The app is showing the time in UTC. You are in a timezone with UTC+2 so your local time is 2 hours ahead of UTC. You can go ahead and set the time and the AudioMoth will record correctly according the configuration and schedule that you set in the Config App. Alex

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