root
881 B
881 B
Wiring Overview
House Battery Power Distribution
House Battery Positive ├── 5A Fuse → ESP32 Controller ├── 3A Fuse → 12V→5V Buck Converter ├── 30A Fuse → Fridge Relay └── 30A Fuse → Starlink Relay
House Battery Negative ├── ESP32 Ground ├── Buck Converter Ground ├── Relay Grounds └── Sensor Grounds
Dashboard Power
12V House Battery ↓ Buck Converter (5V) ↓ CAT5 Cable ↓ Pico Dashboard
Communications
Pico ↓ UART over CAT5 ↓ ESP32
Backup: WiFi
Relay Control
ESP32 Relay Output ↓ Bosch Relay Coil
Bosch Relay Contacts ↓ Fridge / Starlink / Future Loads
No high-current loads pass through the ESP32 relay board.
Temperature Sensors
Single DS18B20 Bus
Sensors:
- Fridge Zone 1
- Fridge Zone 2
- Rear Seat Area
- Outside Air
Future:
- Battery Compartment
- Cabin Air
- Water Tank