ESP32-D2WD recorder and USB MSD

[ffb_boy_30]

Hi,
I'm newbie with the esp family but I'm interested by this chip to make a high speed recorder in the 16Mo of the Embedded memory.
And I would like to make a usb msd to get the file stored in the chip.
First of all, I need to design my board , is there somes applications note about the design ?
I need some uarts / SPI / I2C and the USB.
Is there some board with this chip to start working on the code before making the custom board.
Thanks.

[ESP_Sprite]

There's the ESP32 Hardware Design Guidelines as well as the datasheets of the modules we sell (ESP32-Wroom/Wrover). You can get devboards at various outlets (Mouser, Aliexpress, Arrow, Sparkfun, ...) that you can prototype your design on. Note that the ESP32 does not have a native USB peripheral; the USB port that most devboards have goes to a dedicated USB-to-serial converter. (The ESP32-S2 will have USB support; it's expected in Q1 next year.)

[ffb_boy_30]

Hi,
Thanks for the links , I don't know about the wrover (thanks for the name).
I've found the ESP32-WROVER-B it look great but is the SRAM keeps the data when the power is off ?
Do you think it is possible to make a kind of ftp or webpage to download the files I've recorded ?
Thanks

[ESP_Sprite]

No, SRAM looses its data on power loss. Yes, ftp or http is possible, look around on the Internet and you'll find plenty examples of people doing that.

[ffb_boy_30]

that what I tought RAM is volatile but I was not sure.
The best solution to test my idea is the ESP-WROVER-KIT V4.1 , there is 4Mo in SPI flash, sdcard and wifi .
Thanks