SmartHeaterControl

Smart Heater Control Module 🔥

This project is a smart safety and control module for electric heaters. Designed using KiCad, it includes temperature monitoring, relay-based control, safety cutoffs, and visual feedback, all powered by a microcontroller (e.g., ESP32 or Arduino).

🧩 Features

• Real-Time Temperature Monitoring
• Relay Control for Heater Switch
• Safety Cut-off with Thermal Fuse
• OLED Display for Status Info
• Manual Override Switch
• PCB Designed using KiCad

📐 Block Diagram

🧪 Schematic

🛠️ PCB Layout Previews

📋 Bill of Materials (BOM)

🔌 System Explanation

Power Flow

AC Mains → Step-down SMPS → 5V/12V Regulated Supply → Microcontroller → Relay Control

Sensor and Relay Logic

• If temperature < threshold → Relay ON → Heater ON
• If temperature ≥ threshold → Relay OFF → Heater OFF

Safety & Fallback

• Thermal fuse as a hardware cutoff
• Watchdog timer in software
• Manual override and warning LED/OLED

🧪 Test Plan

1. Simulate gradual temperature increase
2. Observe cutoff at 60°C
3. Check relay OFF and OLED warning
4. Allow manual reset below 50°C

📁 Project Structure

├── SmartHeaterControl.kicad_sch
├── SmartHeaterControl.kicad_pcb
├── gerber/
├── screenshots/
├── BlockDiagram.png
├── Schematic.png
└── PCB_View_*.png

💻 MCU Programming Guide

Hardware Pin Mapping (ESP32)

Note: DS18B20 needs a 4.7kΩ pull-up resistor on the data line.

Required Libraries (Arduino IDE)

• OneWire.h
• DallasTemperature.h
• Adafruit_GFX.h
• Adafruit_SSD1306.h

ESP32 Board Setup in Arduino IDE

1. Install board support:
   • Board Manager URL:
     https://raw.githubusercontent.com/espressif/arduino-esp32/gh-pages/package_esp32_index.json
2. Select board: ESP32 Dev Module
3. Connect device via USB and select correct COM port
4. Install required libraries via Library Manager

👨‍💻 Author

Soumabha Majumdar
📧 soumabha.majumdar@gmail.com
📞 7003472159

📜 License

This project is open-source and free to use for academic and non-commercial purposes.

🔌 Sample Arduino Code

#include <OneWire.h>
#include <DallasTemperature.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>

#define ONE_WIRE_BUS 4
#define RELAY_PIN 13
#define BUZZER_PIN 14
#define BUTTON_PIN 12

#define SCREEN_WIDTH 128
#define SCREEN_HEIGHT 64
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, -1);

OneWire oneWire(ONE_WIRE_BUS);
DallasTemperature sensors(&oneWire);

float cutoffTemp = 60.0;
float resumeTemp = 50.0;
bool manualReset = false;

void setup() {
  Serial.begin(115200);
  sensors.begin();