BlendMicro Bluetooth experiments by Strooom

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Purpose is to build a smart presence detector. This device decides when you are home or not. When you are home, a number of other devices can be powered down. Presence can be detected in a number of ways, but I would like to (also) detect it from the presence of your smartphone. This should be possible through its bluetoot LE function : when the presence monitor 'sees' the bluetooth signal of the smartphone, it decides you are nearby. Problem is that Bluetooth Low Energy is not that easy to implement. I am starting from a BlendMicro board, which is an Arduino(-compatible) with BLE built-in (Nordic Semiconductor nRF8001 module) BlendMicro can use its BLE module through a Application Controller Interface (ACI), which is a bidirectional interface, implemented as a Serial Peripheral Interface (SPI)