Water Leak Detector and Alarm using meshbot

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Water Leak Detector and Alarm using meshbot

The EzloPi smart devices provide automation through simple, customizable use with our open-source EzloPi platform, making daily life easier and improving human-machine interactions.

Before moving into this example, it is very important to know about the device registration, provisioning and converting the ESP32 device into an EzloPi device along with knowledge of Web Flasher, MiOS Mobile Application for Android/iOS and the MiOS Web Application.

1. About this example

The project aims to create a smart water leak detection and alarm system by interfacing the SEN 18 water leak sensor and a buzzer with the EzloPi device. When a leak is detected by the sensor, the buzzer will be triggered, alerting the user to the presence of water. The system provides early detection of water leaks, minimizing potential damage to property. Users can remotely monitor and control the water leak detection system through the MiOS applications.

3. Circuit Setup & Interfacing

The following components are required for interfacing with the EzloPi device:

ESP32 as an EzloPi smart device.
SEN 18 Water Leak Sensor.
Buzzer module.

The wiring diagram of ESP32 30 pin is represented as follows:

The following connections are made in order to complete the circuit setup.

From ESP32 to SEN18 Water leak sensor:

Connect 3V3 from the ESP32 to the VCC of the sensor.
Connect GND from the ESP32 to the GND pin of the sensor.
Connect D2 from the ESP32 to the pin “S” of the sensor as an input.

From ESP32 to the Buzzer:

Connect the D4 pin from the ESP32 to the Signal (I/O) pin of the buzzer.
Connect the 3v3 from the ESP32 to the VCC of the Buzzer
Connect the GND to the negative pin of the buzzer.

4. Interfacing the SEN18 Water Leak Sensor with Buzzer using EzloPi Web Flasher

1. Set up your device/hardware by visiting config.ezlopi.com

Now, click on the Connect Device button and a pop-up window will appear.

Now, select COM Port to which your ESP32 device is connected. In our case, the COM3 port is used.

Click Connect.

If you are new to this and it's your first time configuring, select Create new Device ID. Enter Wifi SSID and Wifi Password.
In the Device Configuration, tab click on Analog Input.

An Analog Input window will open for inputting the following parameters:

Set a device name of your choosing. In our case, we set it to Water Leak with Buzzer.
Set Device subtype to Water Leak Sensor.
Set OUT GPIO to 32.
Set Resolution to 10-bit.
Now Click the Apply button.
After clicking the apply button you can see a table of your setting in the device configuration tab.
Press the Flash Device button.

In the Device Configuration, tab click on Digital Output.

A Digital Output window will open for inputting the following parameters:

Set a device name of your choosing. In our case, we set it to Buzzer.
Set Device subtype to Relay.
Set OUT GPIO to 4.
Set Resistor to PULL UP.
Set the default value to LOW.
Now Click the Apply button.
After clicking the apply button you can see a table of your setting in the device configuration tab.
Press the Flash Device button.

A window will appear on the bottom right side of the screen displaying “Please press BOOT button while flashing begins.”

Hold the BOOT button down until the next window appears on the bottom right side of the screen which says “Installation prepared. Please release the boot button now.”

Release the BOOT button from your ESP32 when this pop-up on the bottom right window appears.

After some time, a popup will appear saying Device Flashed Successfully! This means that your device has been set up successfully.

5. MiOS Web Application

After configuring the controller with the EzloPi web flasher, head to ezlogic.mios.com

Use the same credentials to log in that you used for configuring the controller with the web flasher.

Now, on the MiOS web dashboard, you will be able to see the tiles for the Water Leak Sensor and Buzzer. These tiles will indicate the status of the Buzzer depending on the water being detected by the sensor.

MeshBots

On the left side of the screen under Automation, click on MeshBots.

On meshbot screen, click on Create new MeshBot button present on the top right corner of the screen.

After clicking on Create new MeshBot you will see this now under Automation MeshBot click on Local.
On the next screen you will see that we can create a name of our choosing, in this case we write it as Test001.

In the trigger tab you can set the TRIGGER for your device and in the ACTION tab you can set the action to be performed based on the trigger which you have created.

Set these values in TRIGGER section:

Set Node Type to Device.
Set the Node to Water Leak Sensor.
Set the Capability to Water leak alarm.
Set the value to water_leak_detected

Set these values in the ACTION section.

Click on TRUE.
Set Node Type to Device.
Set Controllable Type to Buzzer.
Set the Capability Type to switch.
Set the Value to true.
Set Action to immediately.

Now Click on FALSE.

Set Node Type to Device.
Set Controllable Type to Buzzer.
Set the Capability Type to switch.
Set the Value to false.
Set Action to immediately.
Now Click the Save button.

Here you can see your saved MeshBot. Now click on Dashboard.

After clicking the save button you can see this screen on the top right corner of the screen.

Here in the MiOS web dashboard, you can see that when the Water is detected by the sensor. The Buzzer turns on because of the rules we have set in meshbot.

6. MiOS App

You can download the MIOS Android app from the Google Play Store and Apple App Store.

After downloading the app, proceed to install the application and open it.

Using the MIOS mobile application, create a new Ezlo Cloud account using the sign-up option. If you already have an account, you may proceed to log in.

After successfully logging in, you will be able to see the number of controllers connected such as a lamp, fan, or any other device in the MiOS app. Tap on any controller of your desired ID:

You will be able to see the status of your controller whether it is online or offline. Access the device dashboard, and tap the device. The following view of the dashboard will appear:

Here, as seen on the MiOS mobile dashboard, when the Water Leak Sensor gets triggered, it turns the Buzzer on because of the rules we have set in meshbot.

Here, as seen on the MiOS mobile dashboard, when the Water Leak Sensor does not detect any leakage, it turns off the Buzzer because of the rules we have set in meshbot.

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