Arduino and Objective-c source code from our Android Developer Days 2015 attempt.
This device's hardware is based on Arduino Nano, tinysine BLE bluetooth module and DS18B20 temperature sensor to measure patient's body temperature. It polls measurement data to iOS device continuously. Xcode project pairs, reads and shows temperature data to user that comes from the device.
For 3d printable parts that i designed for it, please visit http://www.thingiverse.com/thing:535572