ESP32 Data Logging Temperature to MicroSD Card
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. …
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ESP32 MQTT – Publish and Subscribe with Arduino IDE
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 …
Build an All-in-One ESP32 Weather Station Shield
In this project I’ll show you how you can build an all-in-one ESP32 weather station shield and display the sensor readings on a web server. The web server displays data …
Raspberry Pi Pico: TM1637 4-Digit 7-Segment Display (MicroPython)
Learn how to use the TM1637 4-Digit 7-Segment Display with the Raspberry Pi Pico programmed with MicroPython. We provide instructions on how to wire the display to the board, install …
Year in Review 2025 – Random Nerd Tutorials
With the beginning of a new year, it is time to share our Year in Review. Every year seems to pass faster than the last, and 2025 was no different. …
Raspberry Pi Pico W: Bluetooth Low Energy (BLE) with MicroPython
The Raspberry Pi Pico W (and 2 W) supports Bluetooth Low Energy, which can be useful in several IoT and automation projects. This article is a getting-started guide on how …
Firebase: Control ESP8266 NodeMCU GPIOs from Anywhere
In this guide, you’ll learn how to control the ESP8266 GPIOs from anywhere using Firebase. We’ll create nodes on the Firebase Realtime Database to save the current GPIO states. Whenever …
ESP8266 NodeMCU Data Logging to Firebase Realtime Database
In this guide, you’ll learn how to log data with the ESP8266 NodeMCU to the Firebase Realtime Database with timestamps (data logging) so that you have a record of your …
ESP8266 NodeMCU with Firebase – Creating a Web App
This guide will teach you how to create a simple Firebase Web App to control and monitor your ESP8266 NodeMCU board. The Web App you’ll create can be accessed worldwide …
ESP8266 NodeMCU: Getting Started with Firebase (Realtime Database)
Get started quickly with Firebase using the ESP8266 NodeMCU board. Firebase is Google’s mobile application development platform that includes many services to manage data from IOS, Android, or web applications. …
Raspberry Pi Pico: DS3231 RTC (Real-Time Clock) – Get Time and Set Alarms (MicroPython)
This is a getting started guide that shows how to interface the DS3231 Real Time Clock Module with the Raspberry Pi Pico board programmed with MicroPython: learn how to set …
ESP8266 NodeMCU: Guide for DS1307 Real Time Clock (RTC) Module (Arduino IDE)
Learn how to use the DS1307 Real Time Clock Module with the ESP8266. We’ll cover how to set and read the time. You’ll learn to synchronize the time with the …
ESP8266 NodeMCU with an Anemometer: Measure Wind Speed (Arduino IDE)
In this guide, you’ll learn how to interface an anemometer with the ESP8266 NodeMCU board to measure wind speed. We’ll cover how to power and connect the sensor to the …
Getting Started with ESP8266 NodeMCU Development Board
New to the ESP8266? Start here! The ESP8266 is a Wi-Fi System on a Chip (SoC) produced by Espressif Systems. It’s great for IoT and Home Automation projects. This article …