©2019 Open Acoustic Devices

Dec 12, 2018

About setting time

11 comments

Hi, i have a question about setting time. As we all know, China is eight hours faster than the UK, so when I set the time, should I set it according to the current Chinese time or the current British time? For example, bird calls are usually between 3 and 9 o 'clock,17 and 20

o 'clock, then when l configure the time is it 19:00 to 1:00, 9:00-12:00, or 3:00 to 9:00, 17:00 to 20:00? In addition, does the device follow this set time period record every day?

 

Dec 12, 2018

Hi, There are two answers to this.

 

1) In the current firmware and configuration app you should set all times to UTC - https://en.wikipedia.org/wiki/Coordinated_Universal_Time - which is the standard time reference in the absence of an timezone. Britain is on UTC during the winter and UTC+1 during the summer.

 

2) In the last couple of days we've released new firmware and configuration versions that support local time - https://www.openacousticdevices.info/single-post/2018/12/12/Version-120---New-Firmware-and-Config-App-Now-Available. If you use the new configuration app with your current device then you can set times using local time (there is an option in the menu to switch to local time) but all filenames and timestamps will be in UTC. If you re-flash you AudioMoth with the new firmware, then the timestamps will also reflect local time, and the file names will be in human readable form. There are instructions to re-flash the firmware here - https://www.openacousticdevices.info/flashing.

 

Whatever recording periods you set are repeated every day.

 

Dec 13, 2018

Hi Alex,

Thanks for your help, i have installed the latest firmware. But i find another problem when i put it in the field, it didn't work after several hours. Neither light was on, no matter how I adjusted it, it didn't work. However, when I put him in the room, half an hour later, he was back to normal again. Is it because the temperature is too low(3℃) that he can't work?

Dec 13, 2018

@1017926861 Can you check that it all functions correctly in the warmth if you set some scheduled recordings.

 

What batteries are you using? If it is the low temperature it is most likely the batteries being affected rather than the device itself.

Dec 14, 2018

@Alex Rogers

yes , it can be uesed in the warmth, and I use this lithium-ion batteries, the instruction says it could work in - 20 ℃

Load more replies
Dec 22, 2018

I notice that those are 14500 Lithium Ion batteries at 3.7V each giving a total of over 11V compared to the expected 4.5V or 3.6V with alkaline or NiMh cells. Would Alex like to comment on the acceptable input voltage range for the on-board voltage regulator? (You can get 1.5V Lithium non-rechargeable batteries too, but they are different from the rechargeable ones in the picture).

Dec 22, 2018

Ah, yes I hadn’t spotted that they were Lithium-Ion batteries. The maximum voltage input to the regulator is 20V so this would work okay but is quite inefficient as the resulting voltage drop is quite large and the battery reading in the header probably won’t be much use as it will report >5V all the time.

Hi All, yesterday I received two Audiomoth. One is right on configuration UTC time, matched with the computer clock; the other one not at all, it remains always on 01/01/1970. I tried with two different PC. Is there something wrong in my passage, or is the unit not working for failure?

New Posts
  • Hi, I have purchased an AudioMoth to detect the ultrasonic sound emitted by bats. And I would like to know how can I detect i) count number of bats ii) bats' flying direction.   I am doing a project to contextualize bat data through different actuators of Arduino. Using LEDs, speakers, motors, etc to visualize bat data. For example, if frequency = 45kHz, LED will light up; if more bats, the motor will spin faster, etc. How can I do that? And can I transfer the data live, and wireless, using a raspberry pi and upload it to the cloud? Again, how can I achieve that?   Finally, is there any guide to manipulating the bat ultrasonic wav. file to human audible sound or visualize through spectrogram? Any tutorial for that? I am trying to use Adobe Audition.   Many Thanks!
  • Hi, I just wanted to check that the AudioMoth should stay with the switch in the USB/OFF position when using the configuration app? Even when you press "Configure AudioMoth" in the app? Then when ready to turn on in the field, change the switch to CUSTOM? Thanks.
  • Hello, I used to record birds (video+sound) as a hobby in my garden using a raspberry pi computer (+ a camera and a microphone attached to the Pi) and a motion detection software. I stumbled upon the audiomoth, ordered one and I wish to record birds for now. What set up should I use? Any advises welcome... Thank you.
Before posting, be sure to check the FAQ.