For a study on alpine bats at high altitude, in Italy, we used the settings in the attached file. On a 128 GB SanDisk Extreme card and Duracell Optimum batteries we always manage to record 5 nights. Best regards Paolo

If in your study area, you have species that emit at frequencies above 110 kHz, if you use 250 kHz sampling rate you will not be able to record them. In the UK Rhinolophus hipposideros emits at around 110 kHz and there are no other species that exceed this value. Ciao. Paolo

Thanks Alex, definitely better than the scenario that hypothesizes hardware problems! I will definitely try using SanDisk. Since I have to record 4 nights I will always use new batteries and better insulate the waterproof case of the AM.

I tried and the time setting is lost and it happens by changing the position of the switch to custom. If I unplug the USB and plug it back in it doesn't happen. I have now done this test: I configured the AMs without inserting the card and in this way they maintain the time settings. In the CUSTOM position the green LED flashes correctly. I tried putting the SD card next and the red light didn't come on. Does this evidence have any meaning? The cards are Silicon Power Superior 128Gb microSDX UHS-I V30 XC I U3 Thanks again

Hi Alex, unfortunately they are all the ones whose ID I attached. They were purchased by the CNR NATIONAL RESEARCH COUNCIL IRSA Water Research Institute in 2022 from: Scubla s.r.l. – Strada di Oselin 108 – 33047 Remanzacco (Ud) – Tel. +39 0432 649277 – VAT number 00540710308 https://scubla.it/home/ The batteries used are Duracell Optimum. Is it worth trying a Manual Switch reset? Thanks for your help Paolo Debernardi

Thanks Alex! Good work Paolo

Thanks for the clarifications. As batteries we only use Duracell OPTIMUM or Duracell PLUS. The USB data cable is this: https://www.amazon.it/dp/B0BBVK89HJ?ref=ppx_yo2ov_dt_b_product_details&th=1 I will try with another laptop with a different USB cable.

Many thanks Alex, using only AudioMothTime App in some AudioMoth I couldn't turn off the steady red led. Using the smartphone app with chime I was able to get all the AudioMoths working again. Configuring with AudioMoth Configurstion App I will put the check on: "Always require acoustic chime" so I have a check every time I leave the AudioMoth running. Paolo

Thanks Alex, I try to change cards (I used SanDisk Ultra cards) and improve the power supply. Paolo