Compare To NFC and Qi Inductive Power Transfer
This protocol is similar at the physical level to NFC (38 kHz carrier, basically an air-core transformer pair) and also Qi's inductive energy transfer (100 kHz-300 kHz carrier). Both modulate the receiver's coil load to communicate to the sender. Some NFC tags can support simple processors and a handful of storage like this protocol. NFC also shares the physical security properties of "magnetic" communications like RuBee.
Read more about this topic: Ru Bee
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