hi,my audiomoths worked a few days after I set the programme.And recently I placed them on feild as usual without any change,they can't work

We used silica gel bags when there were big temperature changes to reduce condensation but I doubt this really makes much difference. We've not had any other reports of devices failing to make recordings so see if it happens again, and we can try to see if there is any pattern to it.

@AlexOk Rogers

Ok.Thank you for your attention.

Could they be getting wet? Are they deployed in plastic bags?

See what happens the next few times. What weather conditions are they deployed in? We had one report of a couple of devices that got very hot in direct sun which caused them not to make any recordings. Apart from that they are generally reported to work as intended.

Are you sure you set the recording periods correctly to allow for the local time zone? All the times in the configuration app are UTC times. If they were working, then didn't work, and now work fine, I think there must have been something wrong with the configuration that was set. It's hard to imagine another failure mode that would cause what you observed.

That’s almost certainly the problem them. The clock will also drift slightly over time so it’s always best to reset the time and configuration even if the batteries are left in.

When you switch to CUSTOM mode both LED will flash together if the time and configuration has not been set and no recording will take place.

if the time and configuration have been set you will see just the green LED flashing whilst the AudioMoth waits for the correct time to start recording.

But when I took back the audiomoths,they were all on only green flash.Does that mean the time and configuration has been set? But no recording in them.

@Sheila Wang It suggests that they were working fine and there was some problem with the configuration. Was there enough space on the SD cards? Have you double checked that they work fine now when deployed at your desk?