ESP32 Digital Inputs and Digital Outputs (Arduino IDE)
In this getting started guide you’ll learn how to read digital inputs like a button switch and control digital outputs like an LED using the ESP32 with Arduino IDE. Prerequisites …
ESP32 Projects
ESP32 MQTT – Publish DS18B20 Temperature Readings (Arduino IDE)
Learn how to publish DS18B20 temperature readings via MQTT with the ESP32 to any platform that supports MQTT or any other MQTT client. As an example, we’ll publish sensor readings …
ESP32 NTP Client-Server: Get Date and Time (Arduino IDE)
Learn how to request date and time from an NTP Server using the ESP32 with Arduino IDE. Getting date and time is useful in data logging projects to timestamp readings. …
ESP32/ESP8266 Thermostat Web Server – Control Output Based on Temperature
In this project, you’ll build an ESP32 / ESP8266 Thermostat Web Server with an input field to set a temperature threshold value. This allows you to automatically control an output …
ESP-NOW Two-Way Communication Between ESP32 Boards
In this guide, we’ll show you how to establish a two-way communication between two ESP32 boards using ESP-NOW communication protocol. As an example, two ESP32 boards will exchange sensor readings …
Get ESP32/ESP8266 MAC Address and Change It (Arduino IDE)
This guide shows how to get the ESP32 or ESP8266 NodeMCU boards MAC Address using Arduino IDE. We also show how to change your board’s MAC Address. What’s a MAC …
Getting Started with ESP-NOW (ESP32 with Arduino IDE)
Learn how to use ESP-NOW to exchange data between ESP32 boards programmed with Arduino IDE. ESP-NOW is a connectionless communication protocol developed by Espressif that features short packet transmission. This …
ESP32 Client-Server Wi-Fi Communication Between Two Boards
This guide shows how to setup an HTTP communication between two ESP32 boards to exchange data via Wi-Fi without an internet connection (router). In simple words, you’ll learn how to …
ESP32 Relay Module – Control AC Appliances (Web Server)
Using a relay with the ESP32 is a great way to control AC household appliances remotely. This tutorial explains how to control a relay module with the ESP32. We’ll take …
ESP32 LoRa Sensor Monitoring with Web Server (Long Range Communication)
In this project, you’ll build a sensor monitoring system using a TTGO LoRa32 SX1276 OLED board that sends temperature, humidity and pressure readings via LoRa radio to an ESP32 LoRa …
TTGO LoRa32 SX1276 OLED Board: Getting Started with Arduino IDE
The TTGO LoRa32 SX1276 OLED is an ESP32 development board with a built-in LoRa chip and an SSD1306 0.96 inch OLED display. In this guide, we’ll show you how to: …
EXTREME POWER SAVING (0µA) with Microcontroller External Wake Up: Latching Power Circuit
In this tutorial, we’ll show you how to build an Auto Power Off circuit (Latching Power Circuit) on a custom PCB, which is extremely useful to save power in your …
ESP32 I2C Communication: Set Pins, Multiple Bus Interfaces and Peripherals (Arduino IDE)
The ESP32 has two I2C bus interfaces that can serve as I2C master or slave. In this tutorial we’ll take a look at the I2C communication protocol with the ESP32 …
ESP32 Pinout Reference: Which GPIO pins should you use?
The ESP32 chip comes with 48 pins with multiple functions. Not all pins are exposed in all ESP32 development boards, and there are some pins that cannot be used.