Meshbot implementation for controlling four LEDs using 1×4 keypad

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Meshbot implementation for controlling four LEDs using 1×4 keypad

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 following project aims to implement the EzloPi meshbot feature and interface a 1x4 matrix membrane keypad switch with an EzloPi device to control four LEDs. The keypad serves as the input interface, allowing users to trigger LED states corresponding to each LED.

Each LED corresponds to a unique keypad input, enabling users to easily manipulate the LED lighting state as on or off. This project enhances user interaction and control over the LEDs, providing a seamless interface for managing various lighting scenarios.

2. Project Video Demonstration

Welcome to the project demonstration video section. The following video showcases the key aspects of Meshbot implementation for controlling four LEDs using 1x4 keypad, providing a visual walkthrough of its implementation.

3. Circuit Setup & Interfacing

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

ESP32 as an EzloPi smart device.
1x4 Membrane matrix keypad.
4x LEDs.
100 Ohms resistor.
The wiring diagram is represented as follows:

The wiring diagram is represented as follows:

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

From ESP32 to the keypad:

ESP32	1x4 Membrane Matrix Keyboard
GND	Pin 5 (Common)
D15	Pin 4
D2	Pin 3
D5	Pin 2
D18	Pin 1

From ESP32 to 4 LEDs & Resistor:

ESP32	LED 01	LED 02	LED 03	LED 04	Resister
D27	Anode	-	-	-	-
D26	-	Anode	-	-	-
D25	-	-	Anode	-	-
D33	-	-	-	Anode	-
NA	Cathode	Cathode	Cathode	Cathode	1st Terminal
GND	-	-	-	-	2nd Terminal

4. Interfacing the 1x4 Membrane Matrix Keypad 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 Device name to Button 1.
Set OUT GPIO to 15.
Set Device subtype to Digital In Switch / Button / Key.
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 Device name to Button 2.
Set OUT GPIO to 2.
Set Device subtype to Digital In Switch / Button / Key.
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 Device name to Button 3.
Set OUT GPIO to 5.
Set Device subtype to Digital In Switch / Button / Key.
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 Device name to Button 4.
Set OUT GPIO to 18.
Set Device subtype to Digital In Switch / Button / Key.
Set the default value to LOW.
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 Device name to LED 1.
Set Device subtype to LED.
Set OUT GPIO to 27.
Set Resistor to PULL UP.
Set the default value to LOW.
Then Click Apply Button.

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

A Digital Output window will open for inputting the following parameters:

Set Device name to LED 2.
Set Device subtype to LED.
Set OUT GPIO to 26.
Set Resistor to PULL UP.
Set the default value to LOW.
Then Click Apply Button.

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

A Digital Output window will open for inputting the following parameters:

Set Device name to LED 3.
Set Device subtype to LED.
Set OUT GPIO to 25.
Set Resistor to PULL UP.
Set the default value to LOW.
Then Click Apply Button.

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

A Digital Output window will open for inputting the following parameters:

Set Device name to LED 4.
Set Device subtype to LED.
Set OUT GPIO to 33.
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.

Now, on the MiOS web dashboard, you will be able to see the tiles for the buttons and the LEDs. The tiles will indicate the status of the LED depending on the button being turned on or off.

MeshBots:

On the right 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 new options, 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 Test01.

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 Button 1.
Set the Category to Switch.
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 1.
Set the Capability to switch.
Set the Value to true.

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

Set Controllable Type to Device.
Set the Controllable to LED 1.
Set the Capability to switch.
Set the Value to false.
Now Click the Save button.

After clicking the save button, Again click on Create Meshbot.

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 values in TRIGGER section:

Set Node Type to Device.
Set the Node to Button 2.
Set the Category to Switch.
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 2.
Set the Capability to switch.
Set the Value to true.

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

Set Controllable Type to Device.
Set the Controllable to LED 2.
Set the Capability to switch.
Set the Value to false.
Now Click the Save button.

After clicking the save button, Again click on Create Meshbot.

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 values in TRIGGER section:

Set Node Type to Device.
Set the Node to Button 3 .
Set the Category to Switch.
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 3.
Set the Capability to switch.
Set the Value to true.

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

Set Controllable Type to Device.
Set the Controllable to LED 3.
Set the Capability to switch.
Set the Value to false.
Now Click the Save button.

After clicking the save button, Again click on Create Meshbot.

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 values in TRIGGER section:

Set Node Type to Device.
Set the Node to Button 4.
Set the Category to Switch.
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 4.
Set the Capability to switch.
Set the Value to true.

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

Set Controllable Type to Device.
Set the Controllable to LED 4.
Set the Capability to switch.
Set the Value to false.
Now Click the Save button.

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

Now, in the MiOS web dashboard, you can see that when the LEDs get triggered by the keypad buttons. The LEDs turn 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:

Now, in the MiOS web dashboard, you can see that when the LEDs get triggered by the keypad buttons. The LEDs turn on because of the rules we have set in meshbot.

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