An circuit includes a first inductive coil and a second inductive coil each including a plurality of metal traces. The first and second inductive coils are each configured to receive a first signal from an electromagnetic field and generate respective first and second output voltages. Each of the first inductive coil and the second inductive coil are configured to inductively couple to the electromagnetic field. A first circuit element is configured to receive the first output voltage and generate a first response at a first power level of the first output voltage. A second circuit element is configured to receive the second output voltage and transition to an active state to perform one or more functions when the second output voltage exceeds a second power level. The first and second power levels are related to movement of the first and second inductive coils through the electromagnetic field.

A method of communicating between a first electronic communication device of a plurality of electronic communication devices and a wireless communication initiating device for reading the first electronic communication device. The method comprises receiving, at the first electronic communication device, a communication signal from the wireless communication initiating device and determining a first characteristic value relating to the communication signal. The method further comprises receiving at least a second characteristic value relating to a communication signal received by at least a second electronic communication device that is connected to the first electronic communication device and initiating communication with a reading device based on the first and second value.

A controller of a transaction card may cause the transaction card to be in a first state. The transaction card may include a battery and at least one other component. In the first state, the battery does not provide power to the at least one other component of the transaction card. The transaction card may receive a signal from a near-field communication (NFC) device and may cause the transaction card to be in a second state based on receiving the signal. In the second state, the battery provides power to the at least one other component of the transaction card. The transaction card may perform a transaction based on the transaction card being in the second state.

Systems and methods monitor loading of cargo onto a transport vehicle to avoid incorrect cargo loading incidents. A wireless monitoring device positioned near an access port of a cargo hold of the transport vehicle receives a tracking identifier of a wireless tracking tag attached to a logistic container containing the cargo as the logistic container is conveyed into the cargo hold. An alert is generated by the wireless monitoring device when the tracking identifier is not listed in a manifest listing identifiers of wireless tracking tags attached to logistic containers expected to be loaded into the cargo hold. Within the cargo hold, the wireless tracking tags may also exchange their tracking identifiers such that any one of the wireless tracking tags may determine, by counting, when less than a target threshold number of wireless tracking tags are present.

Provided are a tag and a method, performed by the tag, of transmitting a response signal regarding a tag search signal. The method includes: receiving, from at least one of a plurality of slave nodes, the tag search signal including identifying data for identifying the tag; charging an energy storage element inside the tag by using the received tag search signal; obtaining the identifying data for identifying the tag from the received tag search signal; determining whether the obtained identifying data matches identification information pre-stored in the tag; and when the energy storage element is charged to a certain numerical value or above and the obtained identifying data matches the identification information pre-stored in the tag, outputting the response signal regarding the tag search signal.

A wireless tag for sensor control is connected to a sensor and configured to control execution of measurements using the sensor. The wireless tag for sensor control includes: an antenna for receiving a radio wave or a magnetic field transmitted from an external wireless device; a power generation unit configured to generate electric power based on the radio wave or the magnetic field received by the antenna; and a control unit configured to control the sensor using generated power, which is the electric power supplied from the power generation unit, wherein the control unit includes: a power supply control unit configured to use a portion of the generated power to execute power supply to the sensor; an acquisition unit configured to receive a detection result from the sensor operated by the execution of the power supply; and a transmission processing unit configured to transmit communication information including the detection result to the outside.

A controller of a transaction card may cause the transaction card to be in a first state. The transaction card may include a battery and at least one other component. In the first state, the battery does not provide power to the at least one other component of the transaction card. The transaction card may receive a signal from a near-field communication (NFC) device and may cause the transaction card to be in a second state based on receiving the signal. In the second state, the battery provides power to the at least one other component of the transaction card. The transaction card may perform a transaction based on the transaction card being in the second state.

Systems and methods monitor loading of cargo onto a transport vehicle to avoid incorrect cargo loading incidents. A wireless monitoring device positioned near an access port of a cargo hold of the transport vehicle receives a tracking identifier of a wireless tracking tag attached to a logistic container containing the cargo as the logistic container is conveyed into the cargo hold. An alert is generated by the wireless monitoring device when the tracking identifier is not listed in a manifest listing identifiers of wireless tracking tags attached to logistic containers expected to be loaded into the cargo hold. Within the cargo hold, the wireless tracking tags may also exchange their tracking identifiers such that any one of the wireless tracking tags may determine, by counting, when less than a target threshold number of wireless tracking tags are present.

Systems and methods monitor loading of cargo onto a transport vehicle to avoid incorrect cargo loading incidents. A wireless monitoring device positioned near an access port of a cargo hold of the transport vehicle receives a tracking identifier of a wireless tracking tag attached to a logistic container containing the cargo as the logistic container is conveyed into the cargo hold. An alert is generated by the wireless monitoring device when the tracking identifier is not listed in a manifest listing identifiers of wireless tracking tags attached to logistic containers expected to be loaded into the cargo hold. Within the cargo hold, the wireless tracking tags may also exchange their tracking identifiers such that any one of the wireless tracking tags may determine, by counting, when less than a target threshold number of wireless tracking tags are present.

Systems and methods for operating an Electronic Smart Tag (“EST”). The methods involve: operating the EST in a first operational state in which first item related information is output from an electronic output device of the EST that is powered by an energy storage device storing energy harvested from an external energy source; detecting when a charge level of the energy storage device reaches or falls below a first threshold level; and transitioning an operational state of the EST from the first operational state to a second operation state in which a message is output from EST requesting that a mobile device be placed in proximity to the EST for purposes of obtaining at least a first portion of the first item related information, in response to the detection that the charge level of the energy storage device has reached or fallen below the first threshold level.