GPIO Default State
Before connecting a button to an MCU’s GPIO, we must use a resistor to set up the default GPIO state. The GPIO pin’s default state can be one…
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Connecting a Button to an ESP32
In this chapter, we’ll learn how to connect a button to the ESP32 GPIO pin 22, explore the difference between connecting the button to 3.3V or GND, understand…
Internal Pull-Up and Pull-Down
The ESP32 has built-in pull-up and pull-down resistors, which can be enabled in software using the pinMode() function. The resistance values for the internal pull-up and pull-down resistors…
Resistor
Why Is a Resistor Necessary? Can we use a jumper wire connect to VCC or GND to setup the default state for button instead of using resistor? it…
ESP32 WiFi
The ESP32 is well-known for its Wi-Fi capabilities, offering a wide range of features that make it ideal for a variety of wireless applications, from IoT (Internet of…
Hello World
In the ESP32, hosting a web server is straightforward, allowing us to display data from the ESP32, such as sensor information, or even gather input from users. In…
Overview of DHT Sensors
In this chapter, we will explore Digital Humidity and Temperature (DHT) sensors, which are essential components for measuring environmental conditions in electronic projects. We’ll cover three popular variants:…
Project – RGB LED (Digital)
RGB LEDs have three individual LEDs inside—red, green, and blue. These LEDs usually share a common connection, which can either be a cathode (negative terminal) or an anode…
Station Mode
In Station mode (STA), the ESP32 connects to an existing Wi-Fi network, functioning as a client. It’s similar to how your phone or PC connects to a home…