Monitoring Suhu Dan Kelembaban Menggunakan ESP32 + DHT22 Dengan Protokol MQTT

Idrus Project

9 Nov 202310:42

Summary

TLDRThis video tutorial guides viewers through creating an IoT project using an ESP32 microcontroller and a DHT22 sensor to monitor temperature and humidity. It covers the setup of hardware connections, installation of necessary libraries in Arduino IDE, programming steps, and configuration of MQTT for data publishing. The video also demonstrates how to use the MQTT Dash app on Android for real-time monitoring of the environmental data, concluding with a live test of the system.

Takeaways

📷 The video demonstrates setting up an IoT project using an ESP32 and a DHT22 sensor to monitor temperature and humidity, displaying the data on an MQTT dashboard.
🔍 The ESP32 microcontroller is chosen for its built-in Wi-Fi module, facilitating easy internet connectivity for the project.
🌡️ The DHT22 sensor is selected over the DHT11 for its higher accuracy in measuring temperature and humidity.
🔧 Two breadboards are used in the setup to accommodate the ESP32, which would otherwise occupy all available pins on a single breadboard.
🔌 The DHT22 is connected to the ESP32 using jumper cables, with the VCC pin to VIN, the OUT pin to a digital pin (D32), and the GND pin to the ESP32's ground.
📚 The Arduino IDE is used for programming the ESP32, requiring the installation of the PubSubClient and DHT.h libraries for MQTT communication and sensor data reading.
📝 The script includes setting up Wi-Fi credentials and MQTT broker details within the Arduino code, using a free MQTT broker like broker.hivemq.com.
🔑 The MQTT topic for publishing data is defined in the code, with a unique identifier to prevent data collision, especially when using a free broker.
🔄 The 'void Loop' function in the Arduino code is responsible for obtaining data from the DHT22 and publishing it to the MQTT broker.
📲 The video mentions using an Android app, such as MQTT Dash, to monitor and display the temperature and humidity data published by the ESP32.
🛠️ The video is sponsored by PCBY, a PCB manufacturing service offering low-cost prototyping, and also provides services like CNC, 3D printing, and laser cutting.

Q & A

What is the main purpose of the project described in the video?
-The main purpose of the project is to create an Internet of Things (IoT) device that monitors temperature and humidity using an ESP32 microcontroller and a DHT22 sensor, and publishes the data to an MQTT broker.
Why is the ESP32 microcontroller a suitable choice for this project?
-The ESP32 microcontroller is suitable because it includes built-in Wi-Fi connectivity, making it easier to connect the device to the internet for data transmission.
What are the alternatives to the DHT22 sensor mentioned in the script?
-The script mentions the DHT11 as an alternative to the DHT22, but the DHT22 is chosen for its higher accuracy in measuring temperature and humidity.
Why are two breadboards used in the project setup?
-Two breadboards are used because a single ESP32 module occupies all available pins on one breadboard, preventing the use of additional pins on the same side.
What is the function of the USB cable in the project setup?
-The USB cable is used for programming the ESP32 microcontroller, connecting it to a computer or laptop for code upload and debugging.
Which libraries are required to be installed for the project's Arduino programming?
-The required libraries for the project are 'PubSubClient' for MQTT communication and 'DHT.h' for reading data from the DHT22 sensor.
What is the significance of the MQTT broker in the project?
-The MQTT broker is essential for the project as it acts as an intermediary for the ESP32 to publish temperature and humidity data to a topic, which can then be subscribed to and monitored.
How can one subscribe to the data published by the ESP32 in the script?
-One can subscribe to the data by using an MQTT client, such as the MQTT Dash app on Android, and setting up a subscription to the specific topic that the ESP32 publishes to.
What is the recommended MQTT broker for a free service as mentioned in the script?
-The script recommends using 'broker.hivemq.com' as a free MQTT broker service for the project.
How does the video guide the user to test the project setup on the hardware?
-The video instructs the user to upload the program to the ESP32, set up the MQTT Dash app on an Android device to monitor the data, and then test the hardware by observing the temperature and humidity readings on the app.
What is the importance of having a unique topic for the MQTT messages?
-Having a unique topic is important to avoid data conflicts, especially when using a free MQTT broker, as a common topic might be used by multiple users, leading to mixed data streams.

Outlines

00:00

🌡️ IoT Weather Monitoring Project Setup

This paragraph introduces an IoT project that involves monitoring temperature and humidity using an ESP32 microcontroller and a DHT22 sensor. The project is about setting up an MQTT-based system to display the readings on an MQTT dashboard. The video explains the components required, including an ESP32 for Wi-Fi connectivity and the DHT22 for higher accuracy compared to the DHT11. It also covers the physical setup with breadboards and jumper cables, and mentions the need for a USB cable for programming. The paragraph concludes with a brief introduction to the software setup, including the installation of necessary libraries in the Arduino IDE.

05:01

🛠️ Programming and Configuring the IoT Device

The second paragraph delves into the programming aspect of the project. It describes the process of writing code for the ESP32 using the Arduino IDE, including the setup of Wi-Fi and MQTT connections. The video script outlines the creation of an ESP client object for connecting to Wi-Fi and the use of functions to publish temperature and humidity data to a unique MQTT topic to avoid data conflicts. It also covers the setup of the MQTT dashboard on an Android device using the MQTT Dash app, explaining how to create a new project, add widgets for temperature and humidity, and configure the subscription to the correct MQTT topics. The paragraph ends with a test of the hardware setup, showing the MQTT dashboard displaying the sensor readings.

10:03

📈 Testing and Final Thoughts on the IoT Project

The final paragraph discusses the testing phase of the IoT project. It mentions observing the sensor readings on the MQTT dashboard and suggests warming up the sensor to see the temperature rise in real-time. The paragraph also includes a call to action for viewers to support the channel by liking, sharing, commenting, and subscribing. The video concludes with a sign-off, thanking viewers for watching and expressing anticipation for the next video.

Mindmap

Keywords

💡ESP32

ESP32 is a microcontroller with integrated Wi-Fi capabilities, which simplifies internet connectivity for projects. In the video, it is used as the central processing unit for the IoT project to monitor temperature and humidity. The script mentions 'microcontroller kita menggunakan esp32' and 'kita bisa pasangkan esp32-nya di bagian tengah', indicating its role in the project setup.

💡DHT22

DHT22 is a type of sensor used for measuring temperature and humidity. The video emphasizes its higher accuracy compared to alternatives like DHT11. The script refers to it as 'sensornya sendiri kita menggunakan dht22' and 'dht 22-nya di sini', showing its importance in gathering environmental data.

💡MQTT

MQTT, or Message Queuing Telemetry Transport, is a lightweight messaging protocol for small sensors and mobile devices, facilitating the communication between the ESP32 and the broker. The script discusses 'menggunakan protokol, mqtit' and 'ESP client supaya nanti bisa, dihubungkan ke, wifi', highlighting its use for data transmission in the project.

💡Breadboard

A breadboard is a device used for building and testing electronic circuits without soldering. The video mentions using two breadboards, 'perakitan kita bisa menggunakan, braidbard seperti ini', to accommodate the ESP32 and DHT22, allowing for easy connections and adjustments.

💡Jumper Cable

Jumper cables are used to connect components within a circuit. The script includes 'gunakan kabel jumper ke dht 2-2-nya', indicating their use to link the DHT22 sensor to the ESP32 for data collection.

💡Arduino IDE

Arduino IDE is the integrated development environment used for writing and uploading code to the ESP32. The video script includes instructions on 'masuk ke pemrograman Arduino ide-nya', showing it as the tool for programming the microcontroller.

💡Library

In the context of the video, a library refers to pre-written code modules that are included in the project for specific functionalities, such as 'pub sub client' and 'dht.h' for MQTT communication and reading sensor data. The script mentions 'menginstal beberapa library' and provides steps for including them in the project.

💡WiFi

WiFi is a wireless networking technology used to connect devices to the internet. The video discusses setting up WiFi connectivity for the ESP32 with 'Network untuk menghubungkan device kita ke jaringan wi-fi', which is essential for the IoT project's remote monitoring capabilities.

💡MQTT Broker

An MQTT Broker is a server that handles MQTT messages between clients. The video mentions 'broker mqtt-nya' and 'broker.hmq.com', indicating its role in the middleman for message passing between the ESP32 and other devices or services.

💡MQTT Dashboard (MQTT Dash)

MQTT Dash is an application used to monitor and visualize data from MQTT topics. The video script includes instructions for setting up MQTT Dash on Android to 'memonitoring data suhu dan kelembaban', demonstrating its use for real-time data observation.

💡Prototype

A prototype in the context of the video refers to the initial model of the IoT project being demonstrated. The script mentions 'pesan 10 keping PCB Prototype', suggesting that viewers can create their own initial models of the project using PCBs from the mentioned service.

Highlights

The project demonstrates how to monitor temperature and humidity using MQTT with an ESP32 and DHT22.

ESP32 is chosen for its built-in Wi-Fi module, simplifying internet connectivity.

DHT22 is selected over DHT11 for its higher accuracy in sensing temperature and humidity.

The tutorial explains the use of two breadboards to accommodate the ESP32 and DHT22 sensors.

The video covers the physical assembly of the ESP32 and DHT22 using jumper cables.

A USB cable is used for programming the ESP32 microcontroller.

The video is sponsored by PCByy, offering affordable PCB prototyping services.

Arduino IDE is used for programming the ESP32 with necessary libraries such as PubSubClient and DHT.h.

Instructions on how to install the required libraries for the project are provided.

The tutorial includes setting up Wi-Fi credentials and MQTT broker details in the code.

The code defines the pins used for connecting the DHT22 sensor to the ESP32.

The video explains the use of dual-core functionality of the ESP32 for efficient programming.

The MQTT topic for publishing temperature and humidity data is configured to be unique to avoid data conflicts.

The tutorial guides through the process of uploading the program to the ESP32.

The video shows how to set up MQTT Dash on Android for monitoring the temperature and humidity data.

MQTT Dash is used to create a new project and add widgets for displaying temperature and humidity readings.

The video concludes with a live demonstration of the setup, showing real-time temperature and humidity monitoring.

The importance of a tight sensor connection for accurate readings is emphasized.

The video encourages viewers to like, share, comment, and subscribe for more similar content.