# Xterra Overland Power & Monitoring Dashboard

## Purpose

A custom monitoring and control system for a Nissan Xterra using a Raspberry Pi Pico 2 W dashboard interface and an ESP32 cargo-area controller.

The system provides:

- House battery monitoring
- Fridge monitoring
- Temperature monitoring
- Power control
- Alarm management
- Future vehicle telemetry

## Dashboard Module

### Hardware

- Raspberry Pi Pico 2 W
- 3.5" SPI Capacitive Touchscreen
- RS-485 communications
- WiFi backup communications

### Responsibilities

- Touchscreen user interface
- Local web dashboard
- Alarm display
- Configuration management
- Relay control interface
- Data visualization

## Cargo Module

### Hardware

- ESP32 Relay Controller
- RS-485 Interface
- House Battery Interface
- DS18B20 Temperature Sensor Bus
- Bosch Relay Drivers

### Responsibilities

- Sensor collection
- Relay control
- Alarm processing
- Communications server
- Configuration storage

## Communications

Primary:
- RS-485

Backup:
- WiFi HTTP API

Future:
- MQTT
- Home Assistant
- Grafana
- InfluxDB

## Future Expansion

- JBD/Xiaoxiang BLE Battery Monitoring
- OBD-II
- CAN Bus
- GPS
- Trip Logging
- Fuel Level
- Coolant Temperature
- RPM
- Starlink Diagnostics