MIDI, the Musical Instrument Digital Interface, is a useful protocol for controlling synthesizers, sequencers, and other musical devices. MIDI devices are generally grouped in to two broad classes: controllers (i.e. devices that generate MIDI signals based on human actions) and synthesizers (including samplers, sequencers, and so forth). The latter take MIDI data in and make [...]

xbee is a wireless communication device from digi.com that uses ZigBee protocol. “ZigBee is a specification for a suite of high level communication protocols using small, low-power digital radios based on the IEEE 802.15.4-2003 standard for wireless personal area networks (WPANs), such as wireless headphones connecting with cell phones via short-range radio. The technology defined by the ZigBee specification is intended to be simpler and less expensive than other WPANs, such [...]

There are many ways to do wireless communication. When developing wearable technology project, it tend to come in play. At the moment, xbee is our favorite, although there are many other ways to do wireless communication.

Sparkfun made a great comparison on wireless modules. 
Sometimes you do not need large data rate, or you need something that [...]

How to upload firmwares on Xbee using Arduino board.