Guide for Relay Module with Arduino
This article shows how to control mains voltage with the Arduino using a relay module. We make a brief introduction to the relay module and build a simple project example …
Low Power Weather Station Datalogger using ESP8266 and BME280 with MicroPython
This project shows how to build a data logger that publishes temperature, humidity and pressure readings every 10 minutes to a Google Sheets spreadsheet using an ESP8266 12-E. Between sensor …
Alexa (Echo) with ESP32 and ESP8266 – Voice Controlled Relay
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 …
Raspberry Pi Motion Detector with Photo Capture
This project shows how to take photos with a Raspberry Pi when motion is detected. It can be used as a burglar detector, to take wildlife photos or in other …
Year in Review 2018 – Random Nerd Tutorials
2018 is almost over and it has just flown by! It is a good time to reflect about what happened during this year. This was a great year for Random …
How to Create .bin (binary) Files from Sketch on Arduino IDE
This guide shows how to generate a .bin (binary) file from your sketch on Arduino IDE. Generate a .bin file in Arduino IDE As an example, we’ll generate a .bin file …
Power ESP8266 with Mains Voltage using Hi-Link HLK-PM03 Converter
In this post you’ll learn how to power the ESP8266 (or ESP32) with mains voltage using the Hi-Link HLK-PM03 converter. As an example, we’ll use the ESP8266-01 to control a …
MicroPython – Getting Started with MQTT on ESP32/ESP8266
In this tutorial, we’ll show you how to use MQTT to exchange data between two ESP32/ESP8266 boards using MicroPython firmware. As an example, we’ll exchange simple text messages between two …
ESP32 Over-the-air (OTA) Programming – Web Updater Arduino IDE
Quick guide that shows how to do over-the-air (OTA) programming with the ESP32 using the OTA Web Updater in Arduino IDE. The OTA Web Updater allows you to update/upload new code …
Better Debugging for Arduino IDE: SerialDebugApp (Part 3)
The SerialDebug library created by João Lopes allows you to improve debugging for Arduino IDE. In this article he’ll show you how to use the SerialDebugAp, companion app of the SerialDebug library.
Better Debugging for Arduino IDE using Software Debugger (Part 2)
The SerialDebug library created by João Lopes allows you to improve debugging for the Arduino IDE. In this article he’ll show you how to use the simple software debugger of the SerialDebug library that has most functionalities of an hardware debugger.
Better Debugging for Arduino IDE: SerialDebug Library (Part 1)
The SerialDebug library allows you to improve and do better debugging in Arduino IDE. In this post, João Lopes (creator of the SerialDebug library) shows you how use it in your projects.
ESP32 Flash Memory – Store Permanent Data (Write and Read)
In this article we’ll show you how to store and read values from the ESP32 flash memory using Arduino IDE. The data saved in the flash memory remains there even …
ESP32/ESP8266 MicroPython Web Server – Control Outputs
Learn how to build a web server to control the ESP32 or ESP8266 outputs using MicroPython framework. As an example we’ll build a web server with ON and OFF buttons to …