The dimensions of the vents are 11x5mm.

Are the files the correct size and readable? If the file sizes are not readable, could you share a screenshot or copy the WAV comments on WAV file 2022034_094500.WAV? In the metadata AudioMoth will state a reason for files ending early.

Replacements for the IPX7 case membranes are available on the GroupGets store. https://store.groupgets.com/products/replacement-acoustic-vent-for-audiomoth-case

If you have updated the firmware beyond the very early version 1.2.1, you can use any size SD card. We are currently on firmware 1.7.1 so that was a long time ago now. SD cards can be formatted to exFat, but should work straight out of the box without needing to re-format. At 32 kHz you could probably use any SD card speed class without any issues, we recommend these SD cards that we have tested for faster sample rates.

I understand your confusion, currently there isn't a way for the Configuration App to read the CONFIG.TXT file off of a device. The device only ever needs configuring once using the Configuration App and will always remember the these settings. Configurations are persistent, even if batteries are removed. The only thing that needs setting after power is lost or batteries run out, is the time. We recommend using the AudioMoth smartphone Chime App after the first Configuration using the AudioMoth Configuration App. The CONFIG.TXT file is only a log file and can be deleted without loosing the configurations set using the AudioMoth Configuration App. AudioMoth will create a new CONFIG.TXT file when the switch is changed from USB/OFF, this is intended for debugging and as a reminder of these original settings. I hope this explains it.

The saved config can be saved manually in the app ‘File’ menu and then loaded onto the app, however, it can’t read the configurations off of a device.

Hi Agus, Yes this is normal. If you want to confirm what was set last on AudioMoth a CONFIG.TXT file is created on the SD card, the file is created when the switch position moves off USB/OFF.

Hi Koen, I'd be surprised if your speaker can vibrate at 100kHz, most are designed to have a frequency response up to 20kHz, unless you have a specialised tweeter speaker. To help find configuration setting for the AudioMoth Configuration App have you seen our new Labs page, specifically the AudioMoth Filter Playground? Here you can upload recordings and experiment with different settings so you can get the perfect filter for your application. Thanks, Andy

Hi Amanda, Yes that's right. To connect the GPS board to AudioMoth Dev you'll need two JST PH jumper cables. 1) The first here, connects the power 'out' on AudioMoth Dev to the power 'in' on the GPS board. 2) The second here, connects the general purpose input and output (GPIO) pins on AudioMoth Dev to the GPIO pins on the GPS board, this allows AudioMoth Dev and the GPS board to communicate. To use the GPS board you need to tell AudioMoth Dev it is plugged in, this is done in the AudioMoth Configuration App. In the Advanced tab check the 'Enable GPS for time setting'. You can read more of the details on the GPS application notes page. We'll be making the GPS boards available in the coming months in a AudioMoth Dev/GPS bundle on GroupGets with a few available . We also have a few prototypes available: email andy@openacousticdevices.info if you're interested.

There are now a limited supply of µMoth available in the latest Round 4 GroupGets campaign here.

Yes, the standard AudioMoth 1.2 would have been easier, they should be available again in the next few months. Until then, have you looked at Lithium Ion batteries, which are much thinner. https://www.adafruit.com/product/2011 You could then use the Lithium Ion battery with a sponge (or something similar) wedged between it and the PCB to make sure the PCB face sits snug against the microphone vent opening. One thing to consider with Lithium Ion batteries is that they are trickier to ship if you are deploying them in another destination.

Hi Eric, We are hoping to make these available by the end of February in a GroupGets campaign. If you require them earlier we might have a few prototype available, email andy@openacousticdevices.info to find out more.

Hi Rachel, Thanks for the message. The first problem, looks like a low battery issue. Could you check the comments on the WAV files? You can see what voltage the batteries are at in the comments. These can be accessed using Audacity, Edit->Metadata... What type of batteries are you using? For the hard drive issue, this appears to be related to formatting. How are the SD cards formatted, and how is the external hard drive formatted?

It doesn't appear to be. I'd have another go with a different cable if you can.

It should appear under 'Universal Serial Bus Controllers'

It's probably not related to Windows as the device should always appear in Device Manager no matter the version. It could either be a cable issue or intermittent USB connector. As its happening on all three devices, it is most likely the cable or the USB connector on the PC side. I'd try a few more different cables if you can.

Have the USB cables you've tried worked previously on other AudioMoths?

Do they appear in Device Manager? When you plug the AMs into the PC by USB do any of the LEDs light up?

Hi arto, When µMoth 1.0.0 is disconnected from power it looses the time, but the configurations persist. The flashing LED pattern you see is µMoth waiting for the time to be set using an acoustic chime, which is played using the AudioMoth smartphone chime app. If you want to use a USB power bank we would recommend using this App. It can be downloaded here https://www.openacousticdevices.info/mobileapplications

Hi Douglas, What hardware version is your AudioMoth? Is it AudioMoth Dev 1.0.0? Andy