An IoT-based safety system that automatically disconnects power in case of short circuit, with real-time web monitoring and manual override capability.
🔌 Relay Behavior:
- Normally CLOSED circuit (allows current flow)
- Opens circuit (STOPS current) when:
- Voltage > 15V threshold
- System is manually disabled
- Uses GPIO33 for relay control
- Real-time Voltage Monitoring - ZMPT101B sensor on pin 32
- Safety Cutoff - Relay on GPIO33 opens circuit at 15V
- Web Dashboard - Live data visualization
- Dual Control - Automatic protection + manual override
- Fail-Safe Design - Defaults to safe state (circuit open)
| Component | ESP32 Connection |
|---|---|
| ZMPT101B VCC | 3.3V |
| ZMPT101B GND | GND |
| ZMPT101B OUT | GPIO32 |
| Relay VCC | 5V |
| Relay GND | GND |
| Relay IN | GPIO33 |
// Critical Configuration (in code)
#define RELAY_PIN 33 // Safety cutoff control
#define VOLTAGE_SENSOR 32 // Analog input
#define VOLTAGE_THRESHOLD 15.0 // Cutoff threshold| Component | Quantity |
|---|---|
| ESP32 | 1 |
| ZMPT101B Voltage Sensor | 1 |
| 5V Relay Module | 1 |
| Jumper Wires | As needed |
| Breadboard | 1 (optional) |
- Wire the components: ZMPT101B → ESP32 VCC → 3.3V GND → GND OUT → A7
Relay → ESP32 VCC → 5V GND → GND IN → GPIO2
- Upload the code:
git clone https://github.com/ShrirangRekhate/LeakShield-Current-Leakage-Detection-and-Monitoring-System#define SENSITIVITY 500.0f // Sensor calibration #define VOLTAGE_THRESHOLD 15 // Cutoff voltage (in volts) const char* ssid = "YourWiFi"; // WiFi credentials const char* password = "YourPassword";
Always disconnect power before working on the circuit
Double-check all connections
Use proper insulation
Never touch exposed wires when powered
MIT License © 2023