Semyon Maryasin 53d58aa49c
Add delay before starting camera
On the ESP32Cam board, when you try to start the camera right after boot-up,
it will give an error, like this:
[E][sccb.c:115] SCCB_Write(): SCCB_Write Failed addr:0x30, reg:0xc7, data:0x10, ret:-1
And then it will fail to init.
They say it is related to poor power supply.

But after I added this 500ms delay, the issue gone.
I suppose it's because after the board boot-up, there is a bunch of things initializing
and comsuming power, which causes camera voltage to be unstable.
And if we wait a bit then those initializations are over
and voltage is more stable.
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ESP3D 3.0 alpha stage

Do not use it for production, in alpha stage - breaking changes can happen anytime - just be aware of that, but feel free to test it and feedback

Use the webUI 3.0 : https://github.com/luc-github/ESP3D-WEBUI/blob/3.0/dist/printer/production/index.html.gz
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please use Arduino ide 1.8.9+ with Release Version or Release Version
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