Engineering Projects

The ESP32 is one of the best choices for IoT projects because of its built-in Wi-Fi, Bluetooth, and energy-saving features. In battery-powered applications, deep sleep mode is especially useful for reducing power consumption while the device waits for a trigger to wake up. The following tutorial covers how to implement deep sleep mode, discuss differences from other low-power modes like light sleep and hibernation, configure wake-up sources, and manage data across sleep cycles to help IoT devices with long runtime on a single charge. Why Use Low Power Modes? Low-power…

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In this project, we will build a temperature, humidity, and dew point data logger with ESP32. This system will show the current time on a 20×4 LCD along with temperature, humidity, and dew point and periodically log the data on an SD card. In the design, an ESP32 microcontroller is used, together with a DS3231 RTC module for correct time representation and a CHT8305 sensor for temperature and humidity readings. The temperature, humidity, and dew point data logger with ESP32 is a versatile project useful in applications such as environmental…

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In embedded systems, time information is monitored through logging and data storage. Most microcontrollers, including ESP32, can store sensor readings, logs, or configuration files on SD cards. In this tutorial, we will explain how to interface an SD card with the ESP32 microcontroller and display the card’s status along with volume on a 20×4 I2C LCD. We will then create a text file on the SD card and write some data. Figure 1: Components of esp32 and SD card Interfacing Hardware Components Required ESP32 development board SD card module SD…

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Sometimes, we must connect multiple LCDs to Arduino to display parameter readings or messages. In the tutorial “How to Interface Multiple I2C LCDs to Arduino,” you will learn how to interface multiple 16×2 I2C LCDs to your Arduino. After completing this tutorial, you will able to know: Select a different address for a 16×2 or 20 x 4 I2C LCD. How to interface multiple I2C LCDs with your Arduino? How to select a different address for different 16×2 LCD We have to configure some hardware to select the address of…

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The CHT8305 sensor is a reliable temperature and humidity sensor popularly known for its high accuracy and low power consumption. It uses I2C to talk, and the device interfaces easily with most microcontrollers like Arduino and ESP32. Adding a 20×4 I2C LCD display to your setup is a great way to easily monitor real-time temperature and humidity values. In this article, I’ll walk you through how to interface the CHT8305 sensor with both Arduino and ESP32, and we’ll also incorporate the LCD display. I’ll break down each step, provide the…

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