arduino - Kevin Hoyt

Circuit Friday: DHT22

Last week for Circuit Friday I introduced temperature sensing with a thermistor - effectively a resistor whose resistance changes based on temperature. We were then able to read the variation of current through the circuit, apply some math, and come up with a temperature. At a high level, this is

arduino

Arduino Yun to Parse.com

There are no shortage of cloud-based solutions, and this is a very good thing. What used to require substantial investment of skill, time and money, can effectively be outsourced for pennies on the gigabyte. As an application developer, this represents the opening of a door to a vast world of

iot

Messaging and the New Web

The Widget Company now has two successful devices on the market. WidgetX (LED) has a web server built into it, and is expecting REST operations for control. WidgetY (photocell) has a WebSocket server built into it, and can push sensor data to the web in real-time. But does this represent

arduino

Circuit Friday: Thermistor

My family has recently moved into a new home, and we are struggling to fine tune the thermostat in this Colorado Fall, where daytime temperatures hit 70°F and drop to 30°F at night. This means temperature sensing applications are fresh in my mind. For today's Circuit Friday then,

arduino

WidgetY and the New Web

My how time flies! The Widget Company has gone on to make many new friends with the revolutionary WidgetX device. Connected to the Internet, you have the power to control an LED through a simple web page. Magnificent! Sales are at an all-time high, and customers love it. With that

web

WidgetX and the Old Web

In my last article on "IoT and the New Web" I talked about how consumer expectations are trending towards instant gratification. I went on to talk about how that experience impacts the Web and the Internet of Things (IoT). I closed by introducing "The Widget Company"

arduino

Tic Tac Toe Light

I had the great privilege of being a speaker at HTML5 Developer Conference in San Francisco recently. It was the second HTML5 Dev Conf I have presented at, with the first one being October 2013. This time, I paired with Frank Greco to present a session entitled "WebSockets: Past,

iot

Real-Time Quadcopter Telemetry

Modern commercial aircraft have what is commonly referred to as a "black box". The black box is a flight data recorder. It captures numerous sensor data points across the aircraft, and records them for playback in the case of a catastrophe. As we have seen lately however, the