Controlling two LEDs with SPDT mini toggle switch

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Controlling two LEDs with SPDT mini toggle switch

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 aims to interface an SPDT mini toggle switch with the EzloPi device to demonstrate how we can implement the switch operation by controlling the state of both the LEDs. The SPDT switch, which has three terminals (common, normally open, and normally closed), will be connected to the GPIO pins of the EzloPi device. The project includes reading the switch’s current state and displaying the status of the switch on the MiOS smart application. In this project, we have implemented the toggle switch with the LED to control its operating state (ON or OFF).

2. Project Demonstration Video

Welcome to the project demonstration video section. The following video showcases the key aspects of Controlling two LEDs with SPDT mini toggle switch, 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.
SPDT toggle switch.
Two LEDs with two 100 Ohm Resistors.

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 SPDT Switch:

ESP32	SPDT Switch
VCC	COM
D2	NC
D15	NO

From ESP32 to Two LEDs & Two Resistors:

ESP32	LED 1	Resistor 1
D4	Anode	-
GND	-	1st Terminal
-	Cathode	2nd Terminal

ESP32	LED 2	Resistor 2
D5	Anode	-
GND	-	1st Terminal
-	Cathode	2nd Terminal

4. Interfacing the SPDT Toggle Switch with LEDs using 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 Digital Input.

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 the SPDT Switch 1.
Set INPUT GPIO to 15.
Set Device Subtype to Switch / Button / Key.
Set Resistor to PULL DOWN.
Set the Default Value to LOW.
Then Click Apply Button.

In the Device Configuration, tab click on Digital Input.

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 the SPDT Switch 2.
Set INPUT GPIO to 2.
Set Device Subtype to Switch / Button / Key.
Set Resistor to PULL DOWN.
Set the Default Value to LOW.
Then Click Apply Button.

Again, 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 1.
Set OUT GPIO to 4.
Set Device Subtype to LED.
Set Resistor to PULL UP.
Set the Default Value to LOW.
Then Click Apply Button.

Again, 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 2.
Set INPUT GPIO to 5.
Set Device Subtype to LED.
Set Resistor to PULL UP.
Set the Default Value to LOW.
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.

On the MiOS web dashboard, you will see the tiles of your connected devices as shown labeled as SPDT switch1, SPDT Switch 2 and the two LEDs. Currently, both SPDT switches are not ON or triggered therefore both the SPDT switches and LEDs tiles show the “OFF” message.

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 EzloPi.

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

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 SPDT Switch 1.
Set the Capability to Switch.
Set the value to True.

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

Set Node type to Device.
Set Controllable to LED 1.
Set Capability to switch.
Set value to true.

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

Set Node type to Device.
Set Controllable to LED.
Set Capability to switch.
Set value to false.
After clicking the apply button you can see a table of your setting in the Current configuration tab.

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

Again, On meshbot screen, click on Create new MeshBot button present on the top right corner of the screen.
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 SPDT Switch 2.
Set the Capability to Switch.
Set the value to True.

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

Set Node type to Device.
Set Controllable to LED 2.
Set Capability to switch.
Set value to true.

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

Set Node type to Device.
Set Controllable to LED 2.
Set Capability to switch.
Set value to false.
After clicking the apply button you can see a table of your setting in the Current configuration tab.

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

Now as seen above, it shows that when the SPDT switch 1 is triggered or toggled, the LED 1 gets turned ON because of the rules we have set in the meshbot.

Now as seen above, it shows that when the SPDT switch 2 is triggered or toggled, the LED 2 gets turned ON because of the rules 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:

As seen above on the MiOS mobile app, it shows that when the SPDT switch 1 is triggered or toggled, the LED 1 gets turned ON because of the rules we have set in the meshbot.

Now as seen above, it shows that when the SPDT switch 2 is triggered or toggled, the LED 2 gets turned ON because of the rules we have set in the meshbot.