Does it boot?
Can you post SDK so I can see what software they have built? For example gstreamer driver?
optional use case...
4) POE with no screen
Maybe you can put pins in the right places to use off-the-shelf POE module.
Something similar to this
Random 8080 pinouts can be handled by having the FPC on the V831 board support the LCD you are going to sell. Any other pin out will need to make a small PCB with two FPC connectors and remap the cables.
Those two I2S lanes on V833 likely for four mics. TDM I2S mic more expensive than non-TDM ones so with four lanes you can use the cheaper versions. I don't know any other reason for two I2S lanes other than to support 4 mics.
Two mics fine on V831 board.
Those pins also useful for attaching smart mic chips.
Consider three use cases:
You could make assembly like a sports camera, sensor pointing forward with display on the back.
V831 does not support MIPI display
No direct FPC connectors for camera and LCD? Or even mount sensor to PCB. Then use microJST for Ethernet and GPIO?.
Like a normal security camera module?
Should be cheaper to make using security module type design. You only need one PCB.
I have been looking at V831 more and I am convinced a V831 board will beat a K210 one.
I'd copy the K210 Maix product offerings, they have a good array of choices.
Another mistake Allwinner made is no h.264 decode. That prevents you from making a sports cam type device with this chip. There is no way to display the saved h.264 video.
I am trying to get this SDK working on a cheap Allwinner SOC.
That is the SDK to build an Echo Show...
The real Echo Show contains a Mediatek MT8163 and 512MB DRAM.
Currently we are targeting H6, 512MB X3 would work too.
That SDK depends on having a browser (webkit, chrome, firefox will do) accessible. Current browsers need a GPU so this browser dependency forces a CPU with a GPU.