two audiomoths showing same problem
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?
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Hi,
These have a hardware manufacturing problem affecting the external SRAM chip. That’s why the USB HID flashing doesn’t work (the firmware is written to the external SRAM and the checksum compared before it is applied to the flash). It looks like a data line or adddress line has a bad connection. Can you post a WAV file here and I can check.
If you install the AudioMoth USB Microphone firmware you’ll find that they appear to be working okay then as that firmware doesn’t use the external SRAM.
Ask LabMaker to send you replacement devices.
Alex