IoT Early Flood Detection & Avoidance

This guide will help you create an IoT-based early flood detection and avoidance system using Raspberry Pi. The system will monitor water levels and provide early warnings to help prevent flood damage.

Components Required

• Raspberry Pi (Model 3 or later)
• Water level sensor (e.g., ultrasonic sensor or float sensor)
• Relay module (optional, for triggering alarms or notifications)
• Connecting wires and breadboard
• Power supply (for Raspberry Pi)
• Cloud service account (e.g., ThingSpeak, Blynk, or AWS IoT)

Setting Up the Hardware

Follow these steps to set up the hardware:

1. Connect the Water Level Sensor

   Attach the water level sensor to the Raspberry Pi using GPIO pins. The sensor will measure the water level and help in detecting rising water conditions.

2. Integrate the Relay Module

   Connect the relay module to the Raspberry Pi. The relay can be used to trigger an alarm or notification when high water levels are detected.

3. Power the System

   Ensure the Raspberry Pi and all connected components are properly powered using appropriate power supplies.

Programming the Raspberry Pi

Write the code to read data from the water level sensor and send alerts to the cloud. Below is a basic outline of the code using Python:

                import RPi.GPIO as GPIO
                import time
                import requests

                # Configuration
                WATER_SENSOR_PIN = 17
                RELAY_PIN = 23
                CLOUD_URL = "https://api.thingspeak.com/update?api_key=YOUR_API_KEY"

                # Setup
                GPIO.setmode(GPIO.BCM)
                GPIO.setup(WATER_SENSOR_PIN, GPIO.IN)
                GPIO.setup(RELAY_PIN, GPIO.OUT)

                def send_alert():
                    response = requests.get(CLOUD_URL + "&field1=1")
                    print(f"Alert sent to cloud: {response.status_code}")

                try:
                    while True:
                        if GPIO.input(WATER_SENSOR_PIN):
                            print("High water level detected!")
                            GPIO.output(RELAY_PIN, GPIO.HIGH)
                            send_alert()
                            time.sleep(10)  # Wait before next check
                        else:
                            GPIO.output(RELAY_PIN, GPIO.LOW)
                        time.sleep(1)  # Adjust as necessary for your application

                except KeyboardInterrupt:
                    GPIO.cleanup()
            

This code monitors the water level sensor. If a high water level is detected, it triggers the relay and sends an alert to the cloud service.

Setting Up Cloud Integration

To receive and visualize alerts, integrate the system with a cloud service. Configure the cloud service to receive data from the Raspberry Pi and set up notifications or alerts based on the water level data.

Testing and Calibration

Test the system by simulating high water levels and verifying that alerts are correctly sent to the cloud and that the relay triggers as expected. Adjust the sensor sensitivity and code parameters as needed for reliable performance.