Intelligent street light management using LDR technology

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.

The following project utilizes the LDR module to monitor ambient light levels and automatically control a miniature street light connected to the EzloPi device. The system ensures energy efficiency by turning the lights on during low-light conditions and off during daylight. The LDR provides real-time feedback to the EzloPi device, enabling precise control and adaptability to varying lighting environments. This setup is ideal for smart city applications, reducing energy consumption and enhancing sustainability. Its compact design and easy integration make it a practical solution for modern lighting systems.

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

• ESP32 as an EzloPi smart device.
• LM393 Photoresistor Module(LDR).
• Miniature illuminated street light.

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 the LDR module:

From ESP32 to the Mini Street Light:

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

2. Log in using the credentials which 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 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 Digital Input.

7. A Digital Input window opens for inputting the following parameters:

• Set a Device name of your choosing. In our case, we set it to LDR.
• Set INPUT GPIO to 13.
• Set Device subtype to LDR Digital Sensor.
• Set the Resistor to PULL DOWN.
• Then Click Apply Button.

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

9. A Digital Output window opens for inputting the following parameters:

• Set a Device name of your choosing. In our case, we set it to Street Light.
• Set INPUT GPIO to 15.
• Set Device subtype to LED.
• Set the Resistor to PULL UP.
• Then Click 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 credential to log in that you used for configuring the controller with the web flasher.

3. On the MiOS web dashboard, you will be able to see the tiles for the LDR digital sensor and mini street light. The street light will be triggered depending upon the functioning of the LDR.

MeshBots:

4. On the left side of the screen under Automation, click on MeshBots.
5. On meshbot screen, click on 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 Test0017.

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 things in TRIGGER section:

• Set Node Type to Device.
• Set the Node to LDR.
• Set the Capability to Switch.
• Set the armed state to any.
• Set the Value to True

9. Set these values in the ACTION section:

• Click on the TRUE part of the Add Action section..
• Set Node Type to Device.
• Set Controllable Type to Street Light.
• Set the Capability Type to switch.
• Set the Value to false.
• Set Action to immediately.

10. Set these values in the ACTION section:

• Click on the False part of the Add Action section..
• Set Node Type to Device.
• Set Controllable Type to Street Light.
• Set the Capability Type to switch.
• Set the Value to true.
• Set Action immediately.
• Now Click the Save button.

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

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

14. Now, on the MiOS web dashboard, you can see that when the LDR receives a decent amount of sunlight therefore the street light remains OFF because it's showing that there is a proper light on the streets. This condition is set in the meshbot.

15. Here, in the above picture, we can see that when LDR is triggered OFF due to low light or no light then our street light turns ON due to the condition we have set in the meshbot.

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. On the MiOS mobile dashboard, you can see that when the LDR receives a decent amount of sunlight therefore the street light remains OFF because it's showing that there is a proper light on the streets. This condition is set in the meshbot.

6. Here, in the above picture, we can see that when LDR is triggered OFF due to low light or no light then our street light turns ON due to the condition we have set in the meshbot.