Arduino, How to know the state of an output pin?

Arduino, How to know the state of an output pin?

Source: www.homautomation.org

Irrighino, an Arduino Yun Based Watering System

Irrighino, an Arduino Yun Based Watering System

There are many different ways to keep your plants watered on a schedule. [Luca Dentella] just created a new one by building the irrighino watering system. He used standard off the shelf, hardware to keep it simple.

Measuring Wind Speed with an Arduino / Anemometer

Measuring Wind Speed with an Arduino / Anemometer

A while back, we got a set of weather sensors from Sparkfun. It includes a Anemometer (speed), Wind Vane (direction), and a Rain Gauge.
I used a hand held wind speed device to calibrate my Arduino code.

Building a garage door fingerprint lock with Arduino

Building a garage door fingerprint lock with Arduino

Leave your keys at home and unlock the door with your finger. Chances are that, if you’re heading out without your car, you don’t always need to carry your keys everywhere you go.

Airboxlab – Open-source air quality monitor

Airboxlab – Open-source air quality monitor

Airboxlab measures: Volatile Organic Compounds (VOCs), Particulate Matter, CO2, Temperature, Humidity. It is specially tailored for indoor spaces, where we spend up to 90% of our time. Airboxlab is open-source and you can make it at your local workshop and start empowering your community.

Remote control with Raspberry Pi and Phidget WebService

Remote control with Raspberry Pi and Phidget WebService

Enable your Raspberry to control relay, led, sensor and digital input remotely with Phidget WebService. The Phidget WebService is a background proces…

Control Nest Devices with Amazon Echo

Control Nest Devices with Amazon Echo

[ZPriddy] was looking for a way to control his Nest thermostats with Amazon Echo. He didn’t want to settle for using AWS or some other hosted service. [ZPriddy] wanted something that he could host and manage completely on his own.

How to Choose Your ESP8266 Module

How to Choose Your ESP8266 Module

The ESP8266 is an amazing chip for all your home automation & Internet of Things projects. This chip costs less than $5, has WiFi connectivity, an onboard processor, and is compatible with the Arduino IDE.

Arduino anti-theft complete alarm

Arduino anti-theft complete alarm

Complete anti-theft alarm compatible with any kind of sensors, with RFID recognition, GSM and web server, based on Arduino Mega.

Spark-core Smart Air Conditioner

Spark-core Smart Air Conditioner

This project uses a simple IR Transmitter (in this case I used a Max Power LED kit to extend the range but any IR LED would do) connected to a spark-core, to send IR commands to the Air conditioning unit over the internet.