02MarMarch 2, 2026

ESP32 Water Level Monitoring Using ESP-NOW and Float Sensors

ESP32 Water Level Monitoring in storage tanks is an important task in homes, industries, and agriculture. In this project, we build a wireless water level monitoring system using two ESP32 boards, float sensors, and the fast wireless communication protocol ESP-NOW.The system sends water level data from one ESP32 to another without using a router or internet connection. The receiver ESP32 displays the water level status on the Serial Monitor, making the system simple, efficient, and reliable.IntroductionWater tanks often require manual...

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14FebFebruary 14, 2026

LoRa-02 SX1278 with ESP32: Complete Pinout, Wiring, and Long-Range Communication Guide

IntroductionLong-range wireless communication without internet, Wi-Fi, or cellular network is no longer a dream. Using the LoRa-02 SX1278 module with ESP32, you can transmit data up to 8–10 km using radio frequency (433 MHz) with extremely low power consumption.The ability to transmit data over 8–10 km opens doors for remote monitoring, smart agriculture, and many other applications where conventional connectivity options fall short.Imagine a world where devices can communicate over vast distances without relying on traditional networks. The LoRa-02 SX1278...

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06FebFebruary 6, 2026

PZEM-004T Energy Meter with ESP32 – Complete Guide (Voltage, Current, Power & Energy Monitoring)

IntroductionWith the rise of IoT-based energy monitoring systems, measuring electrical parameters like voltage, current, power, and energy consumption has become essential for smart homes, industries, and research projects. The PZEM-004T v3.0 energy meter module combined with the ESP32 microcontroller is a powerful, low-cost solution for real-time AC power monitoring.In this blog, we will learn how to interface PZEM-004T with ESP32, understand its working principle, wiring, and Arduino code, and explore real-world applications.What is PZEM-004T?The PZEM-004T is a single-phase AC energy...

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01FebFebruary 1, 2026

How to Use OTA with ESP32 (Over-The-Air Firmware Update Guide)

IntroductionUpdating firmware on an ESP32 using a USB cable every time can be frustrating—especially once the device is installed inside an enclosure or deployed remotely.That’s where OTA (Over-The-Air) updates for ESP32 OTA come in.Firmware updates are crucial for maintaining the security and functionality of your devices. Regular updates can patch vulnerabilities and introduce new features, making OTA updates an essential practice for IoT developers.This method not only enhances convenience but also significantly reduces downtime and manual intervention, especially beneficial for...

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30JanJanuary 30, 2026

ESP32 with 1.3 inch OLED display

IntroductionThe ESP32 with 1.3 inch OLED display is one of the most popular combinations in IoT and embedded electronics projects. The ESP32 offers built-in Wi-Fi and Bluetooth, while the OLED display provides a compact, low-power, and high-contrast output interface.In this guide, you will learn how to connect a 1.3-inch OLED display to ESP32, understand the I2C communication process, explore required libraries, and discover real-world project applications.Why Use a 1.3 Inch OLED Display with ESP32?Using a 1.3 inch OLED display with...

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