ESP32 guides

Guides for the ESP32-S3-DevKitC-1 family. The facts here come from the pinned Espressif documentation snapshot — the same sources every published field on the board page cites.

• Which ESP32-S3-DevKitC-1 do I have? — chip vs module vs board vs SKU vs PCB revision, and what to do when you cannot tell.
• Why the onboard LED is GPIO38 or GPIO48 — the revision that moved the addressable RGB LED, and how to drive it.
• Can I use GPIO35, GPIO36 and GPIO37? — a condition on the module’s memory, not a blanket ban.
• First connection, flashing and LED troubleshooting — two USB ports, the charging-cable trap, download mode, and the LED failure checklist in order.
• ESP32-DevKitC V4 — first connection and flash — the classic ESP32 board: one USB port, no user LED, the C15 trap.