EMD, shows their extremely small IoT node run from an energy harvesting solar cell, which won the CISCO Big Award. EMD works on vibrational and thermo electric as well as solar energy harvesting cells.
EMD is a privately owned Research and Engineering company founded in 2010. Their experienced staff and associates have a spectrum of skills and knowledge combined with that all-essential pioneering and innovative spirit.
For more information, see http://www.e-m-d.co.uk/home.html and http://www.idtechex.com