Hackaday today featured a sensor node which runs on harvested RF energy.
http://hackaday.com/2016/05/01/wisp-needs-no-battery-or-cable/
As the article mentions a 16bit CPU, I wondered if someone put an MSP430 to good low-power use. And yes, digging into the WISP5 project finds that it uses an MSP430FR5969.
Project wiki with links to source code and schematics here:
http://wisp5.wikispaces.com/WISP+Home
http://hackaday.com/2016/05/01/wisp-needs-no-battery-or-cable/
As the article mentions a 16bit CPU, I wondered if someone put an MSP430 to good low-power use. And yes, digging into the WISP5 project finds that it uses an MSP430FR5969.
Project wiki with links to source code and schematics here:
http://wisp5.wikispaces.com/WISP+Home