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Smart devices contain microcontrollers wit … Smart devices contain microcontrollers with Input/Output ports and RadioFrequency (RF) communication modules of different kinds. Wired communication may be established between two devices directly, and between two or more devices through some bus. RF communication from a sender to receivers may be established at a certain radiofrequency, with each party powering its RF module at a certain level, and receivers having a relative measure of the Received Signal Strengh Indicator (RSSI) and Signal-to-Noise Ratio (SNR). or (RSSI) and Signal-to-Noise Ratio (SNR).
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