Smart greenhouse garden using soil moisture sensor, LDR and MQ135 sensor

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 (smart greenhouse garden) utilizes the EzloPi device to monitor and maintain optimal growing conditions for plants. It incorporates a soil moisture sensor to ensure plants receive the right amount of water according to the soil moisture levels, an LDR (Light Dependent Resistor) to track light levels, and an MQ135 sensor to monitor air quality by detecting harmful gases. Together, these sensors provide real-time data, enabling automated control and monitoring to optimize the greenhouse environment, enhancing plant growth and health.

Welcome to the project demonstration video section. The following video showcases the key aspects of Smart greenhouse garden using soil moisture sensor, LDR and MQ135 sensor, providing a visual walkthrough of its implementation.

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

• ESP32 as an EzloPi smart device.
• Capacitive Soil moisture sensor.
• MQ135 NH3 sensor.
• LM393 Photoresistor module (LDR).

The wiring diagram for the ESP32 30 pin is represented as below:

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

From ESP32 to Soil Moisture Sensor:

From ESP32 to MQ135 NH3 Sensor:

From ESP32 to LDR:

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 Analog Input.

7. 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 Soil Moisture Sensor.
• Set Device Subtype to Soil Moisture Sensor.
• Set the ADC input pin to 33.
• Set the Resolution to 10-bit.
• Then Click Apply Button.

8. Again, In the Device Configuration, tab click on Others.

9. A pop up window will open for inputting the following parameters:

• Set a Device name of your choosing. In our case, we set it to MQ135.
• Set Device subtype to MQ135 NH3 Sensor.
• Select the check box of GPIO 1.
• Set GPIO 1 to 26.
• Select the Check box of GPIO 2.
• Set GPIO 2 to 25.
• Then Click Apply Button

10. Again, In the Device Configuration, tab click on Digital Input.

11. A Digital Input window will open for inputting the following parameters:

• Set a Device name of your choosing. In our case, we set it to LDR.
• Set the INPUT GPIO to 32.
• Set Device Subtype to Switch / Push Button / Key.
• Set the Resistor to PULL DOWN.
• 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.

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

10. 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.”

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

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

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,we can see the tiles of the connected devices which can be seen as Soil moisture sensor, MQ135 Air quality sensor and LDR respectively. The respective tiles allow users to remotely monitor their greenhouse environment using these multiple sensors.

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. As seen in the MiOS web dashboard, we can see the tiles of the connected devices which can be seen as Soil moisture sensor, MQ135 Air quality sensor and LDR respectively. The respective tiles allow users to remotely monitor their greenhouse environment using these multiple sensors.