BLE Bluetooth low energy 2 Lower energies 2 Activity levels 1 Activity monitoring 1 Automation 1 Bluetooth 1 Channel occupancy 1 Decision trees 1 Intelligent buildings 1 Low power electronics 1 Low-costs 1 Measurement system 1 Measurements of 1 Multi-resident activity monitoring 1 Older People 1 PIR sensor 1 Passive infrared sensors 1 Real-time signals 1 Sensor networks 1 Signal analyzers 1 Smart homes 1 Sniffer measurement 1 Spectrum occupancies 1 Spectrum occupancy measurement 1 Wearable sensors 1 Wearable tag 1 activity level 1 multi-resident activity monitoring 1 older people 1