Can't help you with the first part (machinery/monitor setup), but after you have collected the data you have several software options to use: 

GeoPard (web-based), check the Yield data analytics article 

SMS advanced (desktop)

JohnDeere Ops center (web, more useful for just visualization at the moment)

QGIS / ArcGIS desktop software

You can drop me the files via email, will demo how it works.