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Getting Started with ESP32 Bluetooth Low Energy (BLE) on Arduino IDE

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The ESP32 comes not only with Wi-Fi but also with Bluetooth and Bluetooth Low Energy (BLE). This post is a quick introduction to BLE with the ESP32. First, we’ll explore what’s BLE and what it can be used for, and then we’ll take a look at some examples with the ESP32 using Arduino IDE. For […]

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ESP32 Data Logging Temperature to MicroSD Card

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This project shows how to log data with timestamps to a microSD card using the ESP32. As an example, we’ll log temperature readings from the DS18B20 sensor every 10 minutes. The ESP32 will be in deep sleep mode between each reading, and it will request the date and time using Network Time Protocol (NTP). Learn […]

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ESP32 MQTT – Publish and Subscribe with Arduino IDE

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This project shows how to use MQTT communication protocol with the ESP32 to publish messages and subscribe to topics. As an example, we’ll publish BME280 sensor readings to the Node-RED Dashboard, and control an ESP32 output. The ESP32 we’ll be programmed using Arduino IDE. Learn ESP32 with Arduino IDE This our complete guide to program […]

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Arduino Time Attendance System with RFID

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In this project you’re going to build a time attendance system with MFRC522 RFID Reader and Arduino. When you swipe an RFID tag next to the RFID reader, it saves the user UID and time in an SD card. It also shows if you are late or in time accordingly to a preset hour and […]

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ESP32 with DC Motor and L298N Motor Driver – Control Speed and Direction

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This tutorial shows how to control the direction and speed of a DC motor using an ESP32 and the L298N Motor Driver. First, we’ll take a quick look on how the L298N motor driver works. Then, we’ll show you an example on how to control the speed and direction of a DC motor using the ESP32 […]

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Request Sensor Data via SMS using Arduino and SIM900 GSM Shield

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In this project we’re going to show you how to request sensor data via SMS with the Arduino. As an example we’re going to request the temperature and humidity from a DHT11 sensor. To send and receive SMS with the Arduino we’re going to use the SIM900 GSM shield. When you send an SMS to the Arduino […]

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ESP32 Servo Motor Web Server with Arduino IDE

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In this tutorial we’re going to show you how to build a web server with the ESP32 that controls the shaft’s position of a servo motor using a slider. First, we’ll take a quick look on how to control a servo with the ESP32, and then we’ll build the web server. Learn ESP32 with Arduino […]

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Car Plate Recognition System with Raspberry Pi and Node-RED

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In this project you’re going to learn how to build a car recognition system using a Raspberry Pi and Node-RED. For this project we’ll be using a software called OpenALPR (Automatic License Place Recognition) that has an API you can use to identify car plates and car models based on an image. Learn ESP32 with […]

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ESP32 Publish Sensor Readings to Google Sheets (ESP8266 Compatible)

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In this tutorial we’re going to show you how to publish sensor readings to Google Sheets using ESP32 or ESP8266 board. As an example, we’ll publish temperature, humidity, and pressure readings using the BME280 sensor to a Google Sheets spreadsheet every 30 minutes – we’ll be using IFTTT. Learn ESP32 with Arduino IDE This our […]

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Control Sonoff Basic Switch with ESP Easy Firmware and Node-RED

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In this project you’ll learn how to use the ESP Easy firmware on a Sonoff basic smart switch and control it with Node-RED using Node-RED dashboard. The Node-RED software is running on a Raspberry Pi. The ESP Easy firmware can also be integrated with other home automation platforms like Home Assistant, Domoticz, openHAB, etc… Learn […]

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Reprogram Sonoff Smart Switch with Web Server

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In this post, you’re going to learn how to flash custom firmware in the Sonoff device, so that you can control it with your own web server. I recommend that you read my previous post to get familiar with the Sonoff. We also have additional resources that describe how to flash a custom firmware to the […]

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Alexa (Echo) with ESP32 and ESP8266 – Voice Controlled Relay

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In this project, you’re going to learn how to control the ESP8266 or the ESP32 with voice commands using Alexa (Amazon Echo Dot). As an example, we’ll control two 12V lamps connected to a relay module. We’ll also add two 433 MHz RF wall panel switches to physically control the lamps.  Learn ESP32 with Arduino […]

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WiFiManager with ESP8266 – Autoconnect, Custom Parameter and Manage your SSID and Password

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In this guide you’ll learn how to use WiFiManager with the ESP8266 board. WiFiManager allows you to connect your ESP8266 to different Access Points (AP) without having to hard-code and upload new code to your board. Additionally, you can also add custom parameters (variables) and manage multiple SSID connections with the WiFiManager library. Learn ESP32 […]

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Build an ESP8266 Web Server – Code and Schematics

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This tutorial is a step-by-step guide that shows you how to build a standalone ESP8266 Web Server that controls two outputs (two LEDs). This ESP8266 Web Server is mobile responsive and it can be accessed with any device that as a browser in your local network. Learn ESP32 with Arduino IDE This our complete guide to […]

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