Add prototype of water sensor code

water_sensor.ino

@@ -0,0 +1,64 @@
+#define ADC_PIN			A0
+#define RELAY_PIN		13
+#define RELAY_OFF		LOW
+#define RELAY_ON		HIGH
+
+#define NUM_SAMPLES 	20
+#define SAMPLE_TIME     100
+#define WATER_THRESHOLD 750
+
+bool leakDetected = false;
+
+void relayOn() {
+	Serial.println("Setting relay ON");
+	digitalWrite(RELAY_PIN, RELAY_ON);
+}
+
+void relayOff() {
+	Serial.println("Setting relay OFF");
+	digitalWrite(RELAY_PIN, RELAY_OFF);
+}
+
+bool sampleWater() {
+	bool waterDetected = true;
+
+	Serial.print("Samples: ");
+
+	for (int i = 0; i < NUM_SAMPLES; i++) {
+		int sample = analogRead(ADC_PIN);
+		Serial.print(sample);
+		Serial.print(",\t");
+
+		if (sample < WATER_THRESHOLD) {
+			waterDetected = false;
+		}
+
+		delay(SAMPLE_TIME);
+	}
+
+	Serial.println(waterDetected ? "POS" : "NEG");
+
+	return waterDetected;
+}
+
+void setup() {
+	Serial.begin(115200);
+	//Serial.setDebugOutput(true);
+
+	Serial.println();
+	Serial.println();
+	Serial.println();
+	Serial.println("===== BOOT UP =====");
+
+	pinMode(RELAY_PIN, OUTPUT);
+	relayOn();
+}
+
+void loop() {
+	if (sampleWater()) {
+		Serial.println("Water detected");
+		relayOff();
+	} else {
+		Serial.println("No water");
+	}
+}