Smart protection with EzloPi
Monitor voltages and ambient temperatures
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
This project involves monitoring voltages and ambient temperature by interfacing a voltage sensor module and a DS18B20 temperature sensor with the EzloPi device. The voltage sensor measures the electrical potential of a source, enabling real-time voltage monitoring, while the DS18B20 captures precise ambient temperature readings. Both sensors are integrated with EzloPi for seamless data acquisition and display. This setup is ideal for applications like environmental monitoring, equipment diagnostics, and smart home automation. The project demonstrates the versatility of the EzloPi device in managing multiple sensor types efficiently.
3. Circuit Diagram & Interface
The following components are required for interfacing with the EzloPi device:
- ESP32 as an EzloPi smart device.
- Voltage sensor module.
- DS18B20 Temperature and humidity module.
- LED with 120 Ohm Resistance.
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 Voltage sensor:
ESP32 | Voltage sensor |
VIN | +(VCC) |
GND | -(GND) |
D33 | S(Signal) |
From ESP32 to the DS18B20:
ESP32 | DS18B20 |
3V3 | VIN |
GND | GND |
D15 | S(Signal) |
From Solid State Relay to LED & Resistor:
ESP32 | LED | Resistor |
D4 | - | Terminal 1 |
GND | Cathode | - |
- | Anode | Terminal 2 |
4. Interfacing the Voltage Sensor and DS18B20 with LED using the EzloPi Web Flasher
1. Set up your device/hardware by visiting config.ezlopi.com
- Log in using the credentials which you just set earlier while signing up.
- 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 be opened for inputting the following parameters:
- Set the Device name of your choosing. In our case, we set it to the Voltage Sensor.
- Set the Device Subtype to Shunt Voltmeter.
- Set the ADC Input pin GPIO to 14.
- Set the Resolution to 10-bit.
- Then Click Apply Button.
- In the Device Configuration, tab click on One Wire.
- A One Wire window will be opened for inputting the following parameters:
- Set a Device name of your choosing. In our case, we set it to the DS18B20.
- Set the GPIO to 15.
- Set the Device Subtype to DS18B20 Temperature Sensor.
- Then Click Apply Button.
- In the Device Configuration, tab click on Digital Output
- A Digital Output window will be opened 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 OUT GPIO to 4.
- Set Resistor to PULL UP.
- 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 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.
- In the MiOS web dashboard, you will be able to see the tiles for the voltage sensor, DS18B20 module and LED. The LED tile will indicate the status of the voltage sensor and DS18B20 depending on what the conditions are set in the meshbot.
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 Cloud.
- On the next screen you will see that we can create a name of our choosing, in this case we write it as Test014.
- 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 these things in TRIGGER section:
- Set Node Type to Device.
- Set the Node to Voltage Sensor.
- Set the Capability to parent_abstract.
- Set the Variables to uuid.
- Set the Comparator to Greater (>).
- Set the Value Type to value.
- Set the Value to 3.70.
- Add another device in the Trigger section by pressing the Add Trigger button.
- Set Node Type to Device.
- Set the Node to DS18B20.
- Set the Capability to parent_abstract.
- Set the Variables to uuid.
- Set the Comparator to Greater (>).
- Set the Value Type to value.
- Set the Value to 30.0.
- 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 power_command.
- Set the Value Type to set.
- Set the Value to true.
- 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, on the MiOS web dashboard, you can see that the voltage sensor is showing random value means source is not connected to it whereas DS18B20 also showing normal temperature value so the LED remains OFF because of the rules we have set in meshbot.
- Here, we can see that now the voltage sensor detects some voltages and also there is an increased value detected by DS18B20 therefore the LED is turned ON because of the conditions we have set in the 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:
- On the MiOS mobile dashboard, you can see that the voltage sensor is showing random value means source is not connected to it whereas DS18B20 also showing normal temperature value so the LED remains OFF because of the rules we have set in meshbot.
- Here, we can see that now the voltage sensor detects some voltages and also there is an increased value detected by DS18B20 therefore the LED is turned ON because of the conditions we have set in the meshbot.
eZlopie Products A single-channel 5V relay module $00.00
eZlopie Products Momentary switch $00.00
eZlopie Products Level Shifter Module (BSS138) $00.00
eZlopie Products ESP32
$00.00
eZlopie Products AC Lamp and Holder
$00.00