SolarLog
SolarLog System 🌞
A comprehensive solar panel voltage monitoring system that combines ESP32 hardware with a React Native mobile app for real-time solar energy monitoring and analysis.
What It Does
SolarLog tracks solar panel voltage in real-time using an ESP32 microcontroller and displays the data through a mobile app. The system provides:
- Real-time monitoring: 60Hz voltage sampling with 5-second averaging
- Historical data: 24-hour data storage with trend analysis
- Mobile dashboard: Interactive charts and voltage analysis tools
- WiFi connectivity: REST API for seamless data access
System Components
ESP32 Hardware
- Voltage measurement from 0-15V solar panels
- Simple voltage divider circuit (two resistors)
- WiFi-enabled data collection and API server
- Persistent data storage across power cycles
React Native App
- Live voltage monitoring dashboard
- Historical data visualization
- Device configuration and management
- Data export capabilities
Quick Setup
Hardware: Connect your solar panel through a voltage divider circuit to the ESP32’s ADC pin (GPIO36).
Circuit:
Solar Panel (+) ----[47kΩ]----+----[15.1kΩ]---- GND
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ESP32 ADC PinSoftware: Configure WiFi on the ESP32, install the mobile app, and connect to start monitoring.
Key Features
- Accurate measurements: 12-bit ADC resolution with optimized voltage divider
- Smart storage: 1-hour RAM buffer + 24-hour flash storage
- Real-time API: JSON endpoints for current readings and historical data
- Cross-platform: Works on both Android and iOS devices
Technical Specs
- Voltage Range: 0-15V (recommended for most solar panels)
- Sample Rate: 60Hz → 5-second averages
- Storage: 720 recent samples + 17,280 historical samples
- Connectivity: WiFi (2.4GHz) with REST API
SolarLog makes solar panel monitoring accessible and comprehensive—perfect for anyone who wants real-time insights into their solar energy generation with professional-grade data collection and mobile visualization.
A screenshot worth 1000 words :
Wiring
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