Smart HVAC monitoring system

Create smart vision with EzloPi!

Top Projects

LED ON/OFF

LED ON/OFF with Push Button

DHT22 Temperature-Humidity Sensor

AC Lamp setup with relay and momentary switch

Smart HVAC monitoring system

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 demonstrates interfacing a BME280 barometric pressure & humidity sensor with the EzloPi device to develop a smart HVAC monitoring system. The BME280 sensor will monitor environmental parameters like temperature, humidity, and pressure, allowing the system to adjust HVAC operations dynamically. Using the EzloPi device, real-time data from the sensor can be processed to optimize energy efficiency, ensuring the system responds to varying indoor conditions. This setup aims to enhance indoor climate control and comfort while reducing energy consumption.

2. Project Demonstration Video

Welcome to the project demonstration video section. The following video showcases the key aspects of Smart HVAC monitoring system, providing a visual walkthrough of its implementation.

3. Circuit Diagram & Interface

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

ESP32 as an EzloPi smart device.
5V BME280 Barometric Pressure & Humidity sensor.
LED with 100 Ohm Resistor.

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 BME280:

ESP32	BME280
VIN	VIN
GND	GND
D21	SCL
D22	SDA

4. Interfacing the Presure and humidity sensor with the 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 I2C.

A I2C Input window will open for inputting the following parameters:

Set a Device name of your choosing. In our case, we set it to BME280.
Set Device Subtype to BME 280 Sensor.
Set the Slave Address to 118.
Set the SDA pin to 21.
Set the SCL pin to 22.
Tick the “Enable Pullup” for both the SDA and SCL.
Then Click Apply 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 the LED
Set Device Subtype to LED.
Set the OUT GPIO to 15.
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.

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 Dashboard

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

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

Here, on the MiOS web dashboard, you will be able to see the tiles of connected devices. In our case we have a BME280 sensor and LED. The LED tile will indicate the status of the LED depending on the temperature and humidity being detected by the BME280 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 Test005.

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 things in TRIGGER section:

Set Node Type to Device.
Set the Node to BME280.
Set the Category to power.
Set the variables to status.
Set the Comparator to Equal (==).
Set the Value Type to value.
Set the value to true.

Set these values in the TRUE part of the ACTION section.

Set Controllable Type to Device.
Set the Controllable to LED.
Set the Capability to switch.
Set the Value to true.
Set Action to immediately.

Set these values in the FALSE part of the ACTION section.

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

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

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

Now in the MiOS web dashboard, we can see that when the temperature and humidity goes beyond a certain value then the LED 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 above on the MiOS mobile dashboard, we can see that when the temperature remains in the set limit, the LED remains OFF because of the rules we have set in meshbot.

Now, as seen above on the MiOS mobile dashboard, we can see that when the temperature increases beyond the specified limit, the LEDs turn ON because of the rules we have set in meshbot.