Using Bluetooth to control a NeoPixel LED strip

Using Bluetooth to control a NeoPixel LED strip
This is the first try of using the latest Bluetooth SoC from Nordic Semiconductor to drive a NeoPixel LED strip composed of 12 WS2812b LEDs. WS2812b LEDs are full color LEDs that can be controlled individually via one single wire, also known as NeoPixel LEDs. I am not going to cover a lot of details ...

Air Quality Monitor

Air Quality Monitor
One thing about having to live in a city is to watch out for the air quality, a more beautiful phrase for air pollution. There are a lot of things inside the air that affect its overall quality. Pollutant is one of those things. There are different kind of pollutants in the air, including natural and ...

Node-Red, MQTT and the new Weather Station (Part 2)

Node-Red, MQTT and the new Weather Station (Part 2)
Node-Red Node-Red is a browser based tool to let you quickly and easily construct your own logic of handling various IoT devices, including subscribing the MQTT messages, listening to HTTP requests, reading and writing to Databases, publishing to MQTT brokers and responding to HTTP requests. It also allows you to define specific functions written in ...

NodeMCU, ESP8266 and Lua (Part 1)

NodeMCU, ESP8266 and Lua (Part 1)
I have been browsing different forums on discussions about micro-controllers with wireless capabilities, and one thing I noticed people keep talking about is the low cost, low power ESP8266. I didn’t pay much attention to it as it does not come with a cloud service like the Particle.io with their Core and Photon devices, nor ...

A Pebble Watch App that does Cheerlights

A Pebble Watch App that does Cheerlights
Pebble Watch is an inexpensive but fun to play with watch. It give you the flexibility to design and implement your own Watch Faces or applications known as Watch Apps. I’ve decided to try something on this watch to just get a feel on how easy/difficult to make it work for me. It turned out is ...

WS2812B LED Wall Clock

WS2812B LED Wall Clock
A Certain Cheerlights Clock Once upon a time, people tell the time by looking at the sun dial, today, we can tell the time by sending a simple query to a RESTful interface … Ok, it was a nightmare, alright. However, having a spare meter of Neopixel LED strip of 60 LEDs/meter, I was thinking what to ...