Systems and methods for determining an inventory. The methods comprise: placing an RFID tag in a first operational mode in which at least one communication operation or device of the RFID tag is disabled or bypassed; performing first operations by the RFID tag to determine when it is time to begin communications in accordance with the time slotted communications scheme; transitioning an operational mode of the RFID tag from the first operational mode to a second operational mode in which the communication operation(s) or device of the RFID tag is enabled or no longer bypassed, in response to a determination that it is time for the RFID tag to begin communications; and transitioning the operational mode of the RFID tag back into the first operational mode when the RFID tag's communications with a remote tag reader for inventory determination purposes are complete or a time slot has expired.

A light-triggered transponder includes one or more of photo cells, a clock recovery circuit and a reverse antenna system. The clock recovery circuit (CRC) includes a photoconductor with a source terminal, a drain terminal for receiving a voltage, the photoconductor resistance varying with received light intensity. The CRC is configured to generate a recovered clock. A reverse antenna system connected to at least one photo cell and configured to transmit data. The photoconductor configured to produce a modulated voltage signal from an incident modulated light incident. The CRC can include an amplifier coupled to the source terminal of the photoconductor via a capacitor for receiving the modulated voltage signal and outputting an analog signal generated from the voltage signal. The CRC can include an inverter coupled to the amplifier and configured to digitize the analog signal of the amplifier.

A light-triggered transponder includes one or more of photo cells, a clock recovery circuit and a reverse antenna system. The clock recovery circuit (CRC) includes a photoconductor with a source terminal, a drain terminal for receiving a voltage, the photoconductor resistance varying with received light intensity. The CRC is configured to generate a recovered clock. A reverse antenna system connected to at least one photo cell and configured to transmit data. The photoconductor configured to produce a modulated voltage signal from an incident modulated light incident. The CRC can include an amplifier coupled to the source terminal of the photoconductor via a capacitor for receiving the modulated voltage signal and outputting an analog signal generated from the voltage signal. The CRC can include an inverter coupled to the amplifier and configured to digitize the analog signal of the amplifier.

A power source, charging system, and inductive receiver for mobile devices. A pad or similar base unit comprises a primary, which creates a magnetic field by applying an alternating current to a winding, coil, or any type of current carrying wire. A receiver comprises a means for receiving the energy from the alternating magnetic field and transferring it to a mobile or other device. The receiver can also comprise electronic components or logic to set the voltage and current to the appropriate levels required by the mobile device, or to communicate information or data to and from the pad. The system may also incorporate efficiency measures that improve the efficiency of power transfer between the charger and receiver.

Embodiments of the present disclosure generally relate to a wireless identification tag with varying identity, and system and methods for use thereof. In one implementation, the tag may include at least one transmitter configured to transmit a tag ID. The tag may also include at least one circuit. The at least one circuit may be configured to receive a first trigger at a first time and generate in a quasi-random manner a first decipherable ID uniquely identifying the tag, and cause the at least one transmitter to transmit the first decipherable ID. The at least one circuit may also be configured to receive a second trigger at a second time and generate in a quasi-random manner a second decipherable ID different from the first decipherable ID and uniquely identifying the tag, and cause the at least one transmitter to transmit the second decipherable ID.

A livestock management system for detecting, tracking, and responding to livestock location and physical parameters, and for determining livestock behavior and physical conditions correlated thereto. The system generally includes a plurality of tags and sensors attached to and implanted in a plurality of livestock, one or more local sensors, a management platform, and a remote computer system. Each tag receives, processes and maintains data regarding the location, activity and physical parameters of a livestock to which it is attached and locally determines the behavior and physical conditions of the livestock. The tags communicate with other nearby tags and sensors locally via dynamic mesh networks and with the management platform and remote computer system via longer range wireless networks. The management platform processes the tag data and produces herd-related data. The remote computer uses the tag data to generate and update livestock behavior and condition models for download to the tags.

A livestock management system for detecting, tracking, and responding to livestock location and physical parameters, and for determining livestock behavior and physical conditions correlated thereto. The system generally includes a plurality of tags and sensors attached to and implanted in a plurality of livestock, one or more local sensors, a management platform, and a remote computer system. Each tag receives, processes and maintains data regarding the location, activity and physical parameters of a livestock to which it is attached and locally determines the behavior and physical conditions of the livestock. The tags communicate with other nearby tags and sensors locally via dynamic mesh networks and with the management platform and remote computer system via longer range wireless networks. The management platform processes the tag data and produces herd-related data. The remote computer uses the tag data to generate and update livestock behavior and condition models for download to the tags.

A livestock management system for detecting, tracking, and responding to livestock location and physical parameters, and for determining livestock behavior and physical conditions correlated thereto. The system generally includes a plurality of tags and sensors attached to and implanted in a plurality of livestock, one or more local sensors, a management platform, and a remote computer system. Each tag receives, processes and maintains data regarding the location, activity and physical parameters of a livestock to which it is attached and locally determines the behavior and physical conditions of the livestock. The tags communicate with other nearby tags and sensors locally via dynamic mesh networks and with the management platform and remote computer system via longer range wireless networks. The management platform processes the tag data and produces herd-related data. The remote computer uses the tag data to generate and update livestock behavior and condition models for download to the tags.

The invention relates to a chip card with a dual, contactless and contact-based communication interface, comprising a card body made up of two metal sheets and an electronic module provided with a terminal block and an antenna designed for radio-frequency communication with the antenna of a remote reader. The electronic module includes an active communication circuit powered by a battery in the chip card, and configured to generate a carrier signal capable of interacting with the carrier signal emitted by a remote contactless reader in order to establish active radio-frequency communication between the chip card and the remote reader.

The disclosure generally relates to wireless sensing nodes, energy harvesting, and energy charging. The disclosure also generally relates to reporting data gathered by the wireless sensing nodes to one or more network services.