# Project Decisions

## Communications

Primary:
- UART over CAT5 initially

Backup/Future:
- RS-485 over CAT5 if UART proves unreliable
- WiFi HTTP API

## Dashboard

- Touchscreen only
- No physical buttons required
- Screen sleeps when ignition is off
- Touch wakes display

## Relay Design

- ESP32 relay board does NOT switch loads directly
- Bosch-style automotive relays switch all major loads

## Power Loads

Current:
- Starlink
- Fridge

Future:
- Inverter
- Camp Lights

## Sensors

Current:
- Fridge Zone 1
- Fridge Zone 2
- Rear Seat Area
- Outside Air

Future:
- Battery Bay
- Cabin Air
- Water Tank

## Configuration

Configuration is stored on controller side, not browser side.

## Logging

No persistent logging currently planned.

Focus:
- Live monitoring
- Alarms
- Control