Hello there (Alex maybe ?)

I bought a second hand HydrMoth. It was working normally for some tests. Then it stoped recording anything. - I had to upgrade the firmware from 1.8.1 to 1.9.0 to get the magnetic switch working. - The board is marked 1.0.0 - Code-bar : res 25 nov. 2023 16:43 CODE_39 => 10414533 - SD card SanDisk Extreme 64Gb (I tried two of them) - Batteries AA Alcaline (new, 4.6 V displayed by the App

- GP REcyclo 2600mAh fully charged

The SD only contains some background noise (see attached recorder WAV). - Yesterday the noise was huge (see 20231124_155900.WAV).

- Today, this noise is very low (see 20231125_152720.WAV) - Nothing of the sounds to be records are recorded, even when testing on my desk. - I tried in different rooms of my house.

- The Live App does show the sound spectrogram, but its Capture contains the same noise than using DEFAULT or CUSTOM settings. See "2023-11-25-record problem.png", "2023-11-25-report1.png" and "20231125_152720.WAV"

Following me, there is an hardware problem. It looks like the SD writing works but the sounds are not recorded on it.

However, il is possible that an unusable very low trace of the sounds are recorded in a corrupted way (I hit my desk with a pencil close to the device).

Any ideas about how to fix this problem ?

Best regards

Pierre