Sorry Nathan but we don't have any sort of generic circuits for this particular application. Maybe someone else on the forum can help you out. I did a quick Google for images (looking for schematics etc.) using: "bluetooth board with piezoresistive sensor" and found these pages: <http://blueflyvario.blogspot.co.uk/2013/12/airspeed-experiments.html> <http://www.researchgate.net/publication/215588005_Development_of_an_in-shoe_pressure-sensitive_device_for_gait_analysis/links/0deec52bb2965863c4000000> <http://www.mdpi.com/1424-8220/12/7/9884/pdf> which may give you a few hints. Also, try having a look through Example's files to see if there are any Arduino based projects that you might be able to adapt.