Raspberry Pi aa a Wifi Hotspot

Wifi adapters: http://www.amazon.com/s/ref=nb_sb_noss?url=search-alias%3Delectronics&field-keywords=wireless%2Badapter

How to setup the RP as wifi hotspot: http://www.maketecheasier.com/set-up-raspberry-pi-as-wireless-access-point/

WIFI SHIELD FOR RASPBERRY PI

E-HEALTH SENSOR PLATFORM COMPLETE KIT V2.0 FOR ARDUINO, RASPBERRY PI AND INTEL GALILEO [BIOMETRIC / MEDICAL APPLICATIONS] – NOW 10 SENSORS AVAILABLE