water sensing circuit breaker socket

This socket ensures children’s safety by breaking the circuit when water is detected and can be remotely controlled via smartphone.

IntermediateProtip1.5 hours809

Things used in this project

Hardware components

Arduino 101

Relay (generic)

DFRobot moisture sensor

Software apps and online services

Arduino IDE

Blynk

Story

Video in-action

It saves children from electric shock when they touch sockets with wet hands. The humidity sensor installed cuts the electricity with relay when humidity level exceeds certain critical value - it means it also breaks circuit when there is a potential hazard, when the environment around it is wet.

The user can also manually break the circuit remotely via smartphone. When you’ve just remembered that you’ve left an electric heater or spinning fan on and there is a toddler wandering home you’d definitely want to turn it off right away.

Humidity sensor is connected to coil and coil inside the socket detects water. Its mechanism is very simple. (See the schematics.)

1 / 2

Schematics

Code

scp (smart concent plug)

#define BLYNK_PRINT Serial

#include <BlynkSimpleCurieBLE.h>
#include <CurieBLE.h>


char auth[] = "YourAuthToken";

BLEPeripheral  blePeripheral;

int soil = A1;
void setup() {
  Serial.begin(9600);
  delay(1000);

  blePeripheral.setLocalName("Blynk");
  blePeripheral.setDeviceName("Blynk");
  blePeripheral.setAppearance(384);

  Blynk.begin(blePeripheral, auth);

  blePeripheral.begin();

  Serial.println("Waiting for connections...");
  pinMode (1, OUTPUT);
  pinMode (2, OUTPUT);
}

void loop() {
  int value = analogRead(soil);
  int hum = map(value, 0, 1023, 0, 100);
  Blynk.run();
  blePeripheral.poll();
  if (hum > 40) {
    digitalWrite(1, LOW);
  } else {
    digitalWrite(1, HIGH);
  }
}

Credits

elective

2 projects • 1 follower

LeeSangGyu

2 projects • 6 followers

water sensing circuit breaker socket