Fire Alarm using KY-026 Flame Sensor and Buzzer

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.

This project aims to create a smart fire detection and alarm system by interfacing the KY-026 flame sensor and a buzzer with the EzloPi device. When a flame is detected by the sensor, the buzzer will be triggered. This system will provide early detection of fire, minimizing potential damage to property and providing real-time alerts and the ability to respond promptly to fire threats and take necessary precautions. Users can remotely monitor and control the fire detection system through the MiOS smart applications.

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

• ESP32 as an EzloPi smart device.
• KY-026 Flame sensor module.
• MH-FMG buzzer.

The wiring diagram for ESP32 is represented as below:

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

From ESP32 to KY-026 Flame Sensor:

• Connect 3.3V from the ESP32 to the sensor's VCC.
• Connect the GND from the ESP32 to the GND pin of the sensor.
• Connect D4 from the ESP32 to the D0 pin of the sensor.
• Connect D33 from the ESP32 to the A0 pin of the sensor

From ESP32 to the Buzzer:

• Connect 3.3V from the ESP32 to the VCC of the buzzer.
• Connect GND from the ESP32 to the GND pin of the buzzer.
• Connect D5 from the ESP32 to the I/O pin of the buzzer.

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

2. Log in using the credentials that you just set earlier while signing up.

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

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

Click Connect.

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

7. An Other window will open for inputting the following parameters:

• Set a device name of your choosing. In our case, we set it to Fire Alarm.
• Set Device subtype to KY-026 Flame Sensor.
• Check GPIO1 and Set it to 4 for Digital output.
• Check GPIO2 and Set it to 33 for the Analog Value.
• 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.

8. Again in the Device Configuration, tab click on Digital Output.

9. 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 the Device subtype to Relay.
• Set OUT GPIO to 5.
• Set the 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.

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

11. 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.”

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

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

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

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

3. After opening the MiOS web app, you will be able to see the tile of your connected device. The KY-026 Flame sensor when combined with a buzzer works as an alarm system for potential fire threats. As seen above, currently no fire is being detected by the sensor.

MeshBots:

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

5. On the meshbot screen, click on the Create new MeshBot button present on the top right corner of the screen.
6. After clicking on Create new MeshBot you will see this now under Automation MeshBot click on Local.

7. On the next screen, you will see that we can create a name of our choosing, in this case we write it as Test0002

8. 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.

9. Set these values in the TRIGGER section:

• Set Node Type to Device.
• Set the Node to Fire Alarm.
• Set the Capability to Heat alarm.
• Set Value to overheat detected.

10. 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 the Save button.

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

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

13. Here in the MiOS web dashboard, you will be able to see the tile of your connected device. The KY-026 Flame sensor when combined with a buzzer works as an alarm system for potential Fire threats. As seen above, currently no fire is being detected by the sensor.

14. When a fire or flame is detected, the buzzer will be triggered and alert its user as shown above.

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

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

2. 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.

3. 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:

4. 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:

5. After opening the MiOS mobile dashboard, you will be able to see the tile of your connected device. The KY-026 slame sensor when combined with a buzzer works as an alarm system for potential Fire threats. As seen above, currently no fire is being detected by the sensor.

6. When a Fire or Flame is detected, the buzzer will be triggered and alert its user as shown above on the MiOS mobile app.