An RFID device includes a case, an antenna, and a power receiving coil. The case includes a rotation mechanism. The antenna is provided in the case. The power receiving coil is provided in the case away from the antenna in an axial direction of the rotation mechanism. The power receiving coil is connected to a power receiving unit that charges a battery. The power receiving coil has a cylindrical shape.

Various embodiments illustrated herein disclose a computing device comprising a wake-up detect circuit configured to detect a state change of a link light emitting diode (LED) associated with the computing device. The wake-up detect circuit is configured to transmit a wakeup trigger signal to a processor to transit from a sleep mode to a wake-up mode in response to the detection of the state change of the link LED. The processor is configured to establish a connection between the computing device and another computing device via a communication link in the wake-up mode, the other computing device corresponds to a device that has caused the state change of the link LED.

Techniques described herein are directed to, among other things, wireless payment readers configured to transition between multiple different power states. In some instances, these power states include one or more relatively low-power states such that an overall battery life of the wireless payment readers are lengthened. Further, in some instances, a point-of-sale (POS) application operating on a POS device that wirelessly couples to an example wireless payment reader may cause the wireless payment reader to transition from one state to another, such as from a first, lower-power state to a second, higher-power state in response to the POS application determining that a payment is to be processed using the wireless payment reader.

An example method for charging a barcode reader that can be implemented by a charging cradle includes: detecting that the barcode reader is coupled to a first interface of the charging cradle for the barcode reader; detecting that a spare battery of the barcode reader is coupled to a second interface of the charging cradle; receiving, via a connection between the charging cradle and a port of a host power source, an indication of a magnitude of an input current that the host power source is capable of delivering to the charging cradle over the connection; comparing the magnitude of the input current to a threshold magnitude; responsive to the comparing, determining a charging order in which to charge the barcode reader and the spare battery using the input current from the host power source; and charging the barcode reader and the spare battery in accordance with the charging order.

An electromagnetic coupling reader may include: an antenna, a management module, and a supervision unit, the supervision unit comprising a sleep mode configured to limit energy consumption, a first wake-up signal enabling the supervision unit to be extracted from the sleep mode, the management module comprising an energy saving mode consisting of measuring, at regular intervals, an impedance of the antenna in order to detect a presence of a peripheral authorizing an electromagnetic coupling, the wake-up signal being activated by the management module when a peripheral is detected, the electromagnetic coupling reader comprising a second wake-up signal controlled by a clock configured to extract the supervision unit from the sleep mode at regular intervals.

An integrated circuit (IC) includes a wireless power receive circuit, a wireless communication module, and a circuit module. The wireless power receive circuit generates a supply voltage from a wireless power electromagnetic signal. The wireless communication module converts inter-chip outbound data into an inter-chip outbound wireless signal; transmits the inter-chip outbound wireless signal to another IC; receives an inter-chip inbound wireless signal from the other IC; and converts the inter-chip inbound wireless signal into inter-chip inbound data. The circuit module is powered by the supply voltage and is operable to generate the inter-chip outbound data; and process the inter-chip inbound data.

An alarm tag comprising a first input unit for generating signals for setting (to ON) or resetting (to OFF) an alarm system of the alarm tag. The alarm tag further includes a second input unit for generating signals for arming the alarm tag and triggering an alarm, and an independent auxiliary input unit that generates independent signals that arm the alarm tag and trigger an alarm. When both the second and the auxiliary input units generate a first signal, the alarm system of the alarm tag is armed and set to ON, and when any of the second and third auxiliary input units generate a second signal while the alarm tag is armed and ON, the alarm system of the alarm tag triggers an alarm, thereby preventing tampering and bypassing of one of the second and auxiliary input units to disarm the alarm.

Disclosed are a method, an apparatus, and a system for collecting tags which may reduce recognition time and energy consumption as compared with a tag collection technology in an active radio frequency identification (RFID) system standard according to the related art. The method for collecting tags by an apparatus for collecting the tags in a RFID system, one collection round including: recognizing tags; and collecting data from recognized tags, wherein the recognizing of the tags comprises one scan period, and comprises repeatedly performing a scan process until the tags are recognized using a bit map indicating a recognition status of the tags within one scan period.

A radio frequency identification (RFID) tag includes a power source, a transmitter to transmit a unique identifier, and a receiver operatively coupled to the transmitter and to receive low-frequency signals from an active RFID transceiver located in the vicinity. The transmitter is activated by the power source responsive to the receiver receiving a wake up command at a predetermined low frequency from the active RFID transceiver. An RFID transceiver includes an antenna, non-transitory computer-readable medium storing instructions and a transmitter to transmit low-frequency signals to RFID tags through the antenna. A processing device of the RFID transceiver can execute the instructions to insert a station identifier (ID) into the low-frequency signals that direct the RFID tags to retransmit the station ID, wherein the station ID identifies an approximate location of the RFID tags.

An apparatus for context-based credit card reader management is provided that includes a point-of sale (POS) terminal, configured to accept employee login credentials via a magnetic stripe card, to display menu items for selection, to add selected menu items to an order, and to accept payment for the order, where the payment may be obtained via swipe, dip, or tap. The POS terminal has a card reader and a reader controller. The card reader reads provided cards when fully powered and enabled. The reader controller is coupled to the card reader, and determines one or more workflow states of the POS terminal, and dynamically controls power states of the card reader according to the one or more workflow states.