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 ...

Cyber Sphero

Recently I have bought the infamous Sphero for my daughter in recognition of her outstanding academic results, also to provide her a chance to code for fun. After a few moments playing with the Sphero using the stock app, I fired up the XCode and grabbed the Sphero SDK. The first and foremost problem immediately ...

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 ...

Connected thermometer

Connected thermometer
Thingspeak is a very interesting site. It collects (and display) a lot of data from different sensors, contributed (of course) by end users. It is interesting to see what it is like to connect a just built thermometer using a Spark Core and a TMP36 temperature sensor to Thingspeak. Currently, it is measuring the temperature ...

Water level alarm

Water level alarm
The water outlet for the air conditioner was broken recently. The water get nowhere to go so we have to collect it in a tin bucket and empty it regularly to avoid overflow.  An egg timer was tried and it is kind of annoying since the time for the water to collect to a certain level was not ...