FIELD: portable alarm devices based on wireless radio communication, possible use for notification about change of position of monitored objects relatively to user monitoring them.
SUBSTANCE: at the beginning of each launch of tracking mode, only training of devices, which are supposed to be used for protection, is performed, and for each new training system authentication changes. Guarding system contains at least two devices, each one of which is made in form of separate keychain and contains a radio chip with microcontroller with guarding system functioning software recorded on it, and one of devices of system has monitoring capacity as part of aforementioned system.
EFFECT: prevented unsanctioned access to system, and also ensured autonomous operation of system in presence of other working analogical guarding systems.
2 cl, 7 dwg
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