dashboard: add esp32-s3 bringup sketch

firmware/esp32-s3-dashboard/README.md

@@ -1,81 +1,29 @@
 # ESP32-S3 Dashboard Firmware
 
-This is the placeholder for the current dashboard firmware direction.
+Target Hardware:
 
-## Target hardware
-
-Current dashboard target:
-
-- Waveshare ESP32-S3 touchscreen display
-- WiFi connection to the Cargo ESP32 access point
-- HTTP/REST communication with the Cargo ESP32 API
-- Future LVGL-based dashboard UI
-
-## Responsibilities
-
-The ESP32-S3 dashboard is responsible for:
-
-- Touchscreen UI
-- Vehicle gauges
-- Dashboard rendering
-- Future CAN/OBD-II vehicle visualization
-- Future tilt/roll/off-road screen visualization
-
-## Not responsible for
-
-The ESP32-S3 dashboard does not own:
-
-- Relay authority
-- BMS authority
-- Alarm authority
-- Cargo ESP configuration storage
-- Load-switching hardware control as the source of truth
-
-The Cargo ESP32 remains the power-system controller and source of truth.
-
-## v1 communication path
-
-    Dashboard ESP32-S3
-            <-> WiFi / HTTP REST
-    Cargo ESP32 AP
-
-Not v1 dashboard communication:
-
-- Pico UART
-- ESP-NOW
-- MQTT
-- CAN between controllers
-
-## Selected Hardware
-
-The selected dashboard hardware target is:
-
-    Waveshare ESP32-S3 Touch LCD 5B
-
-Display details:
-
-- 5-inch touchscreen
-- 1024x600 resolution
+- Waveshare ESP32-S3 Touch LCD 5B
+- 1024x600 display
 - Capacitive touch
-- ESP32-S3 platform
-- Native WiFi
-- Integrated CAN transceiver available for future vehicle integration
+- ESP32-S3
+- 16MB Flash
+- 8MB PSRAM
 
-This is the current active dashboard target. The archived Pico dashboard is not active firmware.
+Current Status:
 
-## Bring-Up Plan
+- Basic dashboard bring-up sketch created
 
-Initial Waveshare ESP32-S3 Touch LCD 5B work should start with standalone bench testing.
+Upcoming milestones:
 
-Bring-up order:
+1. Serial bring-up
+2. Display bring-up
+3. Touch validation
+4. WiFi connection
+5. Cargo ESP API integration
+6. LVGL dashboard
+7. CAN integration
+8. Vehicle telemetry
 
-1. Confirm USB/serial detection.
-2. Flash a known-good Waveshare demo.
-3. Confirm 1024x600 display output.
-4. Confirm capacitive touch input.
-5. Build a minimal project dashboard boot screen.
-6. Connect to Cargo ESP WiFi AP.
-7. Read `/api/v1/status` and `/api/v1/config`.
-8. Render outputs dynamically from the Cargo ESP API.
+Cargo ESP API Base:
 
-Do not start with CAN, OBD-II, tilt sensors, or vehicle wiring.
+    /api/v1