I’m a design technologist in Atlanta. I like working on the front-end of the web. This is my site, Zento where I blog, share and write tutorials…
The ULP (Ultra-Low-Power Coprocessor) coprocessor is a specialized processor built into the ESP32 to handle tasks while…
Here’s how you can wake up the ESP32 from deep sleep using Touchpad T3: ESP32 Deep Sleep…
This example uses GPIO12 as the external wake-up source. How It Works Additional Notes Since RTC memory…
Hibernation mode is the lowest power state available on the ESP32. It is similar to deep sleep…
The ESP32 has multiple power-saving modes, and deep sleep is one of the most effective for reducing…
The ESP32 has built-in pull-up and pull-down resistors, which can be enabled in software using the pinMode()…
In this chapter, we’ll learn how to connect a button to the ESP32 GPIO pin 22, explore…
Before connecting a button to an MCU’s GPIO, we must use a resistor to set up the…
We have learned how to display dynamic information using a Web Server. In this project, we will…
In this project, we will create an ESP32 web server that displays real-time data from a connected…
In the ESP32, hosting a web server is straightforward, allowing us to display data from the ESP32,…
To avoid repeating Wi-Fi connection code, we can abstract the connection process into a separate function and…
The WiFiManager library simplifies the process of connecting an ESP32 to Wi-Fi networks by creating a captive…
Here’s an example of how to manually set up the ESP32 in STA (Station) mode, configure a…
MultiWifi is a feature or technique used to allow the ESP32 to connect to multiple Wi-Fi networks….
Dual Mode on the ESP32 refers to the ability to operate simultaneously in both Station (STA) mode…
In Access Point mode (AP), the ESP32 acts as a Wi-Fi access point, creating its own Wi-Fi…
In Station mode (STA), the ESP32 connects to an existing Wi-Fi network, functioning as a client. It’s…
The ESP32 is well-known for its Wi-Fi capabilities, offering a wide range of features that make it…
Remote infrared (IR) works by transmitting invisible infrared light signals from a remote control to a receiving…
In the previous project, we learned how to capture signals from a remote controller. In this project,…
the VS1838B is a common and widely-used infrared (IR) receiver module. It’s designed to receive and decode…
To use an NTC thermistor with the ESP32, you need to connect it in a voltage divider…
An NTC (Negative Temperature Coefficient) sensor is a type of temperature sensor whose resistance decreases as the…
In this project, we’re going to design a smart sunrise alarm that uses a light-dependent resistor (LDR)…
Voltage Divider Explanation A voltage divider is a simple circuit made of two resistors connected in series….
A photoresistor (also known as a light-dependent resistor or LDR) is a type of resistor whose resistance…
In this project, we’re going to create a fun binary counter using the 74HC595 shift register and…
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