And one more thing, maybe it is important: I've GPS module connected to the device. Does it matter in this case? Kind regards M.

Alex. I did as you suggested. I deployed 1.8.1 basic firmware, set the time via Time app, put clear SDHC card into socket and switch to DEFAULT mode. The unit started recording, I count 1 to 10 with normal voice. Everything (as well as a some noise produced by computers and other electronic staff) recorded clearly, with proper volume - in one word - OK. . Here is CONFIG file created during starting DEFAULT mode: Device ID : 24E14403603690A5 Firmware : AudioMoth-Firmware-Basic (1.8.1) Time zone : UTC Sample rate (Hz) : 192000 Gain : Medium Sleep duration (s) : 540 Recording duration (s) : 60 Active recording periods : 1 Recording period 1 : 00:00 - 24:00 (UTC) Earliest recording time : ---------- --:--:-- Latest recording time : ---------- --:--:-- Filter : - Trigger type : - Threshold setting : - Minimum trigger duration (s) : - Enable LED : Yes Enable low-voltage cut-off : Yes Enable battery level indication : Yes (NiMH/LiPo voltage range) Always require acoustic chime : No Use daily folder for WAV files : Yes Disable 48Hz DC blocking filter : No Enable energy saver mode : No Enable low gain range : No Enable magnetic switch : No Enable GPS time setting : Yes It seems that hardware is ok. What else could I check? M

Alex, thanks for your quick response and the tip. I'll try to do it and give you some feedback soon. M.

Hello Alex! I'll join this topic, since I have similar problem with Lifeplan firmware/configuration. I do not participate in the Lifeplan project, but their recording schedule is what I'd like to use during some of my field research projects. So, having my own AM I followed all the steps in the instruction to upload and run Lifeplan firmware. I succeed - the Flash App (as well as Configuration App and Time App) correctly recognise the Lifeplan firmware as well as unit ID number. But, trying to set correct time with Chime App, the AM green LED blinks bit faster (can "hear" the chime?), but nothing else. Repetition the chime does not work. I solved this problem using Time App - green led light constantly. And finally - switching to CUSTOM mode red and green led flashes in that manner (from instruction): A long flash (500ms) of both LEDs occurs when there is a recording failure, due to an SD card write error or a low battery, that results in a recording being cut short. All batteries or accu's I've used were new or charged. I tried different SD HC cards, formatting them and so on. Even I tried to rewrite CONFIG file, checking syntax in few JSON validators, writing or not quotation marks and so on. Nothing has happened, all the time green and red lights blinking. Could it be problem of AM version? I have 1.1 one. Thanks in advance for any tips. Marcin