Build instructions ------------------ Check out this repository under your sketchbook (normally ~/sketchbook). Check out the BLE library from Nordic under $SKETCHBOOK/libraries: cd ~/sketchbook/libraries git clone https://github.com/NordicSemiconductor/ble-sdk-arduino BLE I've mainly used this git revision of the SDK to build: `a5c325c329e134fa26fc6d0e3fe484b1a9488567`.