Ramgarh Farm Sensor Node Platform¶
Welcome to the engineering documentation for the Ramgarh Farm Sensor Node — a solar-powered, ESP32-based crop monitoring system designed for deployment in Rajasthan, India.
Quick Navigation¶
| Section | Description |
|---|---|
| Overview | System design and architecture overview |
| Quick Start | Production recommendation and key numbers |
| System Architecture | Block diagrams, voltage domains, GPIO mapping |
| Power Model | Energy budget, duty cycles, assumptions |
| Results Summary | Simulation results and graph analysis |
| Design Decisions | Component rationale and tradeoffs |
| Risk Scenarios | Failure modes and degraded operation |
| Deployment Guide | Breadboard validation and field installation |
| Future Enhancements | Planned improvements and next phases |
System at a Glance¶
The Sensor Node is a complete embedded system for autonomous crop monitoring:
- Power System: Solar panel (6V) with Li-Ion battery (NCR18650B, 3400 mAh) and charge management
- Processor: ESP32 DevKit V1 with WiFi connectivity
- Sensors: Soil moisture, rain detection, PIR motion, I2C expansion
- Deployment: Designed for 30+ day autonomy without solar input, indefinite with solar (3× margin)
Solar Panel (6V)
↓
[Charge Controller] → [Li-Ion Battery 3.7V]
↓
[Boost Converter] → [5V Rail]
↓
[ESP32] → [WiFi TX]
↓
[Soil Moisture] [Rain Sensor] [PIR Motion] [I2C Sensors]
Key Numbers¶
| Metric | Value |
|---|---|
| Daily consumption (Profile B) | 77.6 mAh |
| Autonomy without solar | 31 days |
| Autonomy with solar | Indefinite (3× margin) |
| Battery capacity | NCR18650B, 3400 mAh (2720 mAh usable) |
| Solar harvest | ~350 mAh/day (estimated) |
| Operating voltage | 3.7V (battery) → 5V (rail) |
| Active TX power | ~80 mW @ 5V |
| Sleep current | ~200 µA |
Project Status¶
Rev A.1 — Pre-validation. Schematic captured, power model complete, firmware scaffolded. Pending: ESP32 caliper measurements, breadboard validation, PCB layout.
Recommendation: Use Profile B (5 min read / 15 min TX) for production deployment.
Documentation Organization¶
This site is organized by engineering discipline:
- Hardware — Sensor node electrical design, component selection, power budget, assembly guides
- Project — Governance, decision log, engineering processes, review standards
Each section contains detailed reference material, design rationale, and operational procedures.
Getting Started¶
- New to the project? Start with Quick Start
- Deploying a node? See Deployment Guide
- Need technical reference? Check System Architecture
- Troubleshooting? Visit the troubleshooting guide in the hardware docs
Last updated: 2026-03-26