Smart world with EzloPi!
Smart vertical shaft potentiometer
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 interfacing a vertical 12.5mm shaft potentiometer with the EzloPi device to enable precise analog input for various applications. The potentiometer will be used to adjust parameters such as voltage, resistance, or signal strength or used for applications such as LED brightness control or fan speed control, etc. The integration will involve reading the analog values from the potentiometer, processing them through the EzloPi's microcontroller. This setup aims to enhance the EzloPi's versatility in IoT applications by allowing fine-tuned control over connected devices.
2. Project Demonstration Video
Welcome to the project demonstration video section. The following video showcases the key aspects of Smart vertical shaft potentiometer, 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.
- Vertical 12.5mm shaft potentiometer.
The wiring diagram is represented as follows:
The following connections are made in order to complete the circuit setup:
From ESP32 to LDR module:
ESP32 | Potentiometer |
3V3 | 1st Pin |
GND | 2nd Pin |
D33 | 3rd Pin |
4. Interfacing the variable resistor/potentiometer module using 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 open for inputting the following parameters:
- Set a Device name of your choosing. In our case, we set it to the Potentiometer.
- Set Device subtype to Potentiometer.
- Set OUT GPIO to 33.
- Set Resolution to 10-bit.
- 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 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 mobile dashboard, you will be able to see the tile of your connected device. The potentiometer is currently showing the resistance which is set at the moment, the value can be easily changed by turning the knob and its updated resistance value will be displayed on the tile.
- When we turn the knob of the potentiometer clockwise or anti-clockwise, its value will increase or decrease.
6. MiOS Web Dashboard
- 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 potentiometer is currently showing the resistance which is set at the moment, the value can be easily changed by turning the knob and its updated resistance value will be displayed on the tile.
- When we turn the knob of the potentiometer clockwise or anti-clockwise, its value will increase or decrease.
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