This project demonstrates how to read data from the DHT22 temperature and humidity sensor and send that data to the web using an ESP8266 via MQTT.

Last time, I showed how to get started with Microchip's Curiosity HPC board. I will now explore the use of the included buttons and LEDs on this microcontroller board.

As a lifelong PIC fan, I was super thrilled when Microchip sent me a free unit of their Curiosity HPC development board. I’ve been working on PICs for years by just mounting them on breadboards and using PICKit to flash programs. This takes time and so when I’m faced with …

This project demonstrates how two Bluetooth modules connect with each other. I’ll be featuring DFRobot’s Input Shield V2 as the transmitter/controller and Seeed’s ShieldBot, which was seen on my Bluetooth RC Car project, will act as the receiver.

The DHT22 temperature and humidity sensor is a common sensor; in fact, there are tons of tutorials out there teaching you how to use it with your Arduino, Raspberry Pi, or other microcontrollers. What prompted me to write about this sensor is my curiosity about how it gives out two …

To kick off 2019, I would like to create a series of Arduino Robot projects that anyone can learn how to build. The first part of the series is the popular obstacle-avoiding Arduino robot.

I recently got my hands on a 3D gesture sensor from DFRobot and honestly, my brain is ringing with the possible projects I can do with it. Basically, it is a device that can sense hand movements in different directions. Imagine controlling anything just by waving your hands! Let's get …

Wouldn't it be cool if you built your own card login system just like in hotels? Because RFID modules are now easy to get, this is now very possible. This Raspberry Pi RFID project of mine is a simple login system that reads cards and tags. Every time a user …

The Arduino UNO is arguably the most popular Arduino board currently available. This Arduino UNO Pinout diagram reference will hopefully help you get the most out of this board:   Arduino UNO Pinout Description The Arduino UNO board is divided into digital, analog, and power pins. There are pins with …

In a feedback control system, a controller continuously adjusts an output so that the measured value moves toward a desired target. One of the most widely used feedback controllers is the PID controller, named after its three control terms: Proportional (P), Integral (I), and Derivative (D). In this Arduino PID …