PIR sensor with Wemos D1 R32 ESP32 (Replace Arduino with ESP-based board)

Smart motion sensing to elevate your smart home experience!

Top Projects

LED ON/OFF with Push Button

DHT22 Temperature-Humidity Sensor

AC Lamp setup with relay and momentary switch

PIR sensor with Wemos D1 R32 ESP32 (Replace Arduino with ESP-based board)

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

In this project demonstration, we will show you how to convert an existing project which uses an Arduino board and a proximity sensor into a smart project using the ESP32-based development board. The ESP-based EzloPi device provides the capabilities to convert your hardware (projects or devices/sensors) into IoT capable devices.

This following user guide will take you through the steps to make a smart project using ESP MCU based boards. We can get an understanding for this easy process by interfacing the HC-SR501 PIR sensor. This project will enable you to monitor motion in your surroundings and trigger actions or notifications when motion is detected.

2. Project Demonstration Video

Welcome to the project demonstration video section. The following video showcases the key aspects of PIR sensor with Wemos D1 R32 ESP32 (Replace Arduino with ESP-based board), providing a visual walkthrough of its implementation.

3. Circuit Diagram & Interface

The following components are required for interfacing the PIR sensor using the EzloPi device:

Wemos D1 R32 ESP32 as EzloPi smart device.
HC-SR501 Passive Infrared (PIR) sensor

The wiring diagram is represented as follows:

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

From Wemos D1 R32 ESP32 to the PIR Sensor:

Connect the 3V3 pin to the VCC pin of the PIR sensor.
Connect the IO5 pin to the output/DOUT pin.
Connect the GND from the Wemos ESP32 to the GND pin of the PIR sensor.

4. Interfacing the HC-SR501 Passive Infrared (PIR) sensor using the EzloPi Web Flasher

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.

7. 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 PIR.
Set Out GPIO to 5.
Select the Device Subtype as the sensor you are choosing. In our case, we set it to PIR Sensor.
Set the Resistor to PULL DOWN
Set the Default Value to LOW.
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.

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

9. 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 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:

After opening the MiOS mobile dashboard, you will be able to see the tile of your connected device.
Here, we can see the motion sensor tile. The above figure indicates that the sensor is detecting the motion.

6. MiOS Web Application

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

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

After opening the MiOS web dashboard, you will be able to see the tile of your connected device.
The tile on the web dashboard shows whether motion is being detected by the sensor. When “no motion” is being detected then the tile will appear like the above picture.