I recently discovered Lightblue Explorer as a cool and easy way to test LCD displays. LightBlue Explorer is a free application available in the iOS store that allows you to connect your devices using Bluetooth 4.0 Low Energy (aka Bluetooth Smart/Bluetooth Light). It provides support for read, write, and notify as well as a read on the signal strength (RSSI) to the peripheral. There’s also a log feature that helps you track any programming you’re doing and other significant BLE events.
LightBlue Explorer has two main modes: Central and Peripheral. Central helps scan for BLE devices in range while Peripheral allows the device to be advertised to other BLE devices.
The application is provided by Punch Through, an engineering consultancy. Pretty nifty for some of the display testing I’m currently doing.