11MarMarch 11, 2026

INA219 Current Sensor with ESP32 – Measure Voltage, Current, and Power

If you are building an IoT power monitoring project, battery system, or power bank device, measuring current, voltage, and power accurately is very important. The INA219 Current Sensor Module is one of the best sensors for this purpose. In this project, we will focus on using the INA219 with ESP32.In this guide, you will learn how to interface the INA219 current sensor with ESP32, measure voltage and current, understand the circuit diagram, and run the complete Arduino code. This tutorial...

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07MarMarch 7, 2026

AJSR04M Waterproof Ultrasonic Sensor with ESP32 – Complete Guide for Water Level Monitoring

Ultrasonic sensors are widely used in IoT and automation projects for measuring distance and liquid levels. However, standard sensors like HC-SR04 are not suitable for humid or wet environments.This is where the AJSR04M Waterproof Ultrasonic Sensor becomes extremely useful.In this guide, we will learn how to connect the AJSR04M ultrasonic sensor with ESP32, understand how it works, and build a simple water level monitoring system using the NewPing library.This tutorial is ideal for makers, engineers, IoT developers, and students.What is...

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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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