Thanks and nice to virtually meet you. I hear a lot about you and the Arribada initiative :)
Regarding the AudioMoth, it's actually an interesting conversation so I'd like to move it to the Acoustic Monitoring group, here: Audiomoth 2.0 Development
Regarding camera traps, thanks for your insight. It makes a lot of sense. I've worked with a lot of factories in China and what seems to be happening is that it's likely all the trailcams (or at least trailcam electronic assemblies) are made by one company off a generic reference design. That factory sells it to other companies that customizes the enclosure, camera, and sensors and those companies then sell it under their brand. It would actually be interesting to track down the factory that makes those trailcams and see if they'd be willing to make trailcams with specific feature sets for camera traps.
The zoning with the Fresnel lenses is fascinating. That's the description of how the PIR sensors work that I never knew I wanted to learn.
I didn't know that people were putting cameras on ESP32s. That's really interesting. For a Raspberry Pi based camera trap, I'm curious if the traps run into power issues. The RPi was never designed to be a low power device so people have to do a lot of workarounds to get it to work on batteries for long periods of time.
We've actually discussed camera traps quite a bit at hackerfarm before we found WildLabs. We wanted to use them to check what kind of animal population we have near our farm plots as well as where the deer and wild boar would come into the plots from. One idea that we tossed around was an open source camera trap based on a specific ARM Cortex M4 chip that has a unique feature, a digital camera interface. The Cortex M4 would be much easier to optimize for low power operation and it's possible to build a custom board specifically for the camera traps.
The other option we were thinking of was to take a low power programmable logic device (CPLD or FPGA) and put together a standard memory interface to MIPI bridge. That way, it's possible to throw it on to any chip with a standard memory bus and it gets a camera interface. There's pros and cons to both approaches though. If you'd like to talk more about open source camera traps, I'd love to hear your ideas.
Edited on Mon, 2019-03-18 13:31 by StephODonnell
, Add link to Audiomoth 2.0 Development discussion thread.