External Interrupts
The ESP32 allows interrupts to be triggered on GPIO pins. The most common scenarios are when a pin changes state (either HIGH to LOW or LOW to HIGH),…
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Timer Interrupt
Example: Using a Timer to Trigger an Interrupt Explanation: Key Points to Consider:
Volatile Memroy
The volatile keyword in C/C++ is used to inform the compiler that a particular variable can be changed at any time by something outside the normal program flow,…
Buzzer
A buzzer is a small electronic device that produces sound when powered. It is commonly used in alarms, notifications, and indicators in various electronic projects. There are two…
Project – Active Buzzer
An active buzzer is a self-contained unit that generates sound when power is supplied to it. It has a built-in oscillator, so you only need to provide a…
Project – Passive Buzzer
A passive buzzer requires an external signal to create sound. It does not have a built-in oscillator, so it relies on a square wave signal or frequency input…
Project – Musical Doorbell
Let’s create a simple music doorbell using a button and a passive buzzer! When a guest presses the doorbell button, the music will play. Wiring Instructions: With this…
Dual-Mode
Dual Mode on the ESP32 refers to the ability to operate simultaneously in both Station (STA) mode and Access Point (AP) mode. The dual mode enables the ESP32…
Project – DHT22 with LCD Display
In this guide, we will explore how to combine DHT temperature/humidity sensors with LCD displays using I2C communication in Arduino projects. We’ll cover everything from library installation to…