But [Matthew Ford] offers a third option: a simple device with a Bluetooth Low Energy (BLE) module that can get a ... [Matthew] had to modify the Arduino libraries to allow the lp_timer objects ...

Buying an expensive bezel, a cheap HDMI display, an Arduino, a CAN bus shield, an iPod touch with a ghetto serial interface cable that didn’t work out, a HM-10 BLE module, an iPad 4S ...