GUARDIAN v10.0

Environmental Monitor & Plant Whisperer

ESP32-C3 POWERED MULTI-SENSOR SERVO EXPRESSIVE

🌱 SOIL MONITORING

Real-time moisture detection

🌡️ CLIMATE TRACKING

Temperature & humidity sensing

🎭 EMOTIONAL FEEDBACK

Servo-driven expressions

HACKATHON SPECIFICATIONS

Bill of Materials

Glyph C3 Controller: ₹434

DHT22 Temp/Humidity: ₹199

Soil Humidity Sensor: ₹70

Servo Motor: ₹150

OLED Display: ₹220

Components & Wires: ₹200

TOTAL: ₹1,273

🌱 APPLICATIONS

Home Gardening

Monitor houseplants and get expressive feedback

Educational Tool

Teach environmental science with engaging visuals

IoT Prototype

Foundation for connected agriculture systems

Accessibility

Visual/physical feedback for plant care

TECHNICAL IMPLEMENTATION

🔧 HARDWARE COMPONENTS

Glyph C3 (ESP32-C3)

Main controller with WiFi/Bluetooth capability

CONTROLLER ₹434

DHT22 Sensor

High-accuracy temperature and humidity monitoring

SENSOR ₹199

Soil Humidity Sensor

Capacitive moisture detection for accurate readings

SENSOR ₹70

Servo Motor + OLED

Expressive actuator and information display

OUTPUT ₹370

📐 PIN CONFIGURATION

Glyph C3 (ESP32-C3) Pinout Reference

# PIN ASSIGNMENTS

GPIO2 → Servo Motor (PWM)

GPIO8 → DHT22 Data Pin

A2 → Soil Sensor Analog

A1/A0 → I2C (SDA/SCL) for OLED

3V3 → Sensor Power

GND → Common Ground

⚠️ WIRING NOTES

• Servo requires external 5V power for reliable operation
• DHT22 needs 4.7kΩ pull-up resistor on data line
• Soil sensor calibration required for accurate readings
• OLED uses 3.3V I2C communication

CODE ARCHITECTURE

🏗️ SOFTWARE STRUCTURE

// MAIN SYSTEM LOOP

void loop() {

readEnvironmentalData();

evaluateEmotionalState();

updateServoExpression();

refreshDisplay();

}

📊 Data Collection

Bonezegei_DHT22 library for temperature/humidity, analog reading for soil moisture

🧠 State Machine

13 emotional states based on environmental thresholds with scoring system

🎭 Expression Engine

Servo sweeps triggered on state changes with emotion-specific ranges

🎯 EMOTIONAL STATES

// EMOTION MAPPING EXAMPLE

{"X_X", "DROUGHT CRISIS", 0, 40, 20},

{"T_T", "Very Thirsty", 20, 60, 25},

{"^_^", "Happy Plant", 70, 130, 12},

{"^o^", "Thriving!", 90, 150, 10},

{"<3", "Perfect Day", 110, 170, 12},

{"@_@", "Drowning!", 30, 90, 6}

X_X

Drought Crisis

Soil < 10% | Tiny panicked movements

^_^

Happy Plant

Soil 60-75% | Content sweeping motions

Perfect Day

Optimal conditions | Full range sweep

// Guardian v10.0 - Environmental Monitor

// Absurd Industries - PCBCupid Hackathon 2024

#include <Wire.h>

#include <Adafruit_GFX.h>

#include <Adafruit_SSD1306.h>

#include <ESP32Servo.h>

#include <Bonezegei_DHT22.h>

// Hardware configuration

Servo earServo;

int servoPin = 2;

int soilSensorPin = A2;

Bonezegei_DHT22 dht22(8);

// [Complete implementation available in project files]

PROJECT DEMONSTRATION

🎬 WORKING PROTOTYPE

Temperature: {{ demoTemp }}°C

Humidity: {{ demoHumidity }}%

Soil Moisture: {{ demoSoil }}%

Servo Position: {{ demoServo }}°

FUNCTIONALITY

✓ Multi-sensor data fusion working flawlessly
❌ Servo expressions respond to environmental changes
✓ OLED displays real-time status and conditions
✓ Emotional state transitions smooth and logical