System and method of tracking and locating a device

Abstract

A wearable device for location tracking comprises a passive communication module (202), an internal battery (204), and an energy harvesting module (200) integrated within the wearable device The passive communication module (202) is configured to transmit a signal includes a unique identifier (UID) and location data of the wearable device. When the battery module (204) is discharged, the energy harvesting module (200) activates and powers the passive communication module (202) using ambient energy sources such as radio frequency, thermal, or light energy. One or more proximate devices to the wearable device receive the signal and determine the location of the wearable device, which is then transmitted to a primary device via a server (110) for display.

Description

SYSTEM AND METHOD OF TRACKING AND LOCATING A DEVICEFIELD OF INVENTION

[0001] The present disclosure relates to tracking of devices. More particularly, the present invention relates to a system and method of tracking location of a device using other devices.BACKGROUND

[0002] The subject matter discussed in the background section should not be assumed to be prior art merely as a result of its mention in the background section. Similarly, a problem mentioned in the background section or associated with the subject matter of the background section should not be assumed to have been previously recognized in the prior art. The subject matter in the background section merely represents different approaches, which in and of themselves may also correspond to implementations of the claimed technology.

[0003] Smart wearable devices are gaining popularity among the masses, as some of the smart wearable devices can monitor and analyse the health parameters of the user. Additionally, smart wearable devices such as, smart ring, smartwatch, and smart bracelet have become a fashion statement. However, due to their small size smart wearable devices are prone to misplacement and loss, causing significant loss for the user.

[0004] There exist systems to locate the smart wearable devices including global positioning system (GPS). The GPS can locate the smart wearable devices in an event of theft, misplacement, or loss. Further, the GPS requires power to transmit location, and can be powered by internal battery of the smart wearable device. However, due to the small size of such devices, the internal battery is also small and require frequent charging. Thus, in an event of discharged internal battery, the GPS become useless without power.

[0005] Thus, there is a need for a wearable device that overcomes these limitations by providing precise location independent of the internal battery.OBJECTS OF THE INVENTION

[0006] An objective of the present invention is to provide a device capable of being located even when the device is unpowered.

[0007] Another objective of the invention is to provide a device capable of harvesting ambient energy, such as radio frequency energy, thermal energy, or light.

[0008] Yet another objective of the invention is to provide a device capable of broadcasting its Unique Identifier (UID) to nearby devices.SUMMARY OF THE INVENTION

[0009] This summary is provided to introduce aspects related to tracking wearable devices when an internal battery is discharged and the aspects are further described below in the detailed description. This summary is not intended to identify essential features of the claimed subject matter nor is it intended for use in determining or limiting the scope of the claimed subject matter.

[0010] In an embodiment, the present invention provides a wearable device. The wearable device includes one or more sensors, a passive communication module, a battery module, and an energy harvesting module coupled with each other. The one or more sensors configured to measure biomarkers of a user, and a passive communication module is configured to communicate with one or more devices proximate to the wearable device. The battery module configured to supply power to the one or more sensor and the passive communication module. The energy harvesting module is configured to harvest power based on ambient energy, when the battery module is discharged, and activate the passive communication module to transmit a signal to the one or more device proximate to the wearable device. The signal comprises at least one of UID and location of the wearable device.

[0011] In one aspect, the wearable device is a smart ring.

[0012] In one aspect, the at least one or more devices proximate to the wearable device includes at least one of: one or more secondary devices, one or more of primary device or a server.

[0013] In one aspect, the secondary devices are configured to receive the signal including at least UID of the wearable device, determine location of the wearable device based on signal strength, and transmit the UID of the wearable device and location to the server or primary device associated with the wearable device.

[0014] In one aspect, the energy harvesting module is configured to harvest energy selected from at least one of a radio frequency energy, thermal energy, solar energy, or kinetic energy.

[0015] In an embodiment, the present invention provides a system. The system includes a wearable device configured to transmit a signal, and one or more devices configured to receive the signal. The wearable device includes one or more sensors, a passive communication module a battery module, and an energy harvesting module coupled with each other. The one or more sensors configured to measure biomarkers of a user, and a passive communication module configured to communicate with the one or more devices proximate to the wearable device. The battery module configured to supply power to the one or more sensor and the passive communication module. The energy harvesting module is configured to harvest power based on ambient energy, when the battery module is discharged, and activate the passive communication module to transmit the signal to the one or more device proximate to the wearable device. The signal comprises at least one of UID and location of the wearable device.

[0016] In an embodiment, the present invention provides a method. The method includes, harvesting power based on ambient energy using an energy harvesting module, when a battery module integrated in a wearable device is discharged. The method further includes, activating a passive communication module integrated in the wearable device to transmit a signal. The signal includes at least one of UID and location of the wearable device. The method further includes, transmitting, by the passive communication module, the signal to one or more devices proximate to the wearable device. The method further includes, receiving, by the one or more devices, the signal from the passive communication module.

[0017] Other aspects and advantages of the invention will become apparent from the following description, taken in conjunction with the accompanying drawings, illustrating by way of example the principles of the invention.BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings constitute a part of the description and are used to provide further understanding of the present disclosure. The drawings illustrate exemplary embodiments of the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0019] Fig. 1 illustrates an exemplary environment of a wearable device transmitting location to other devices, in accordance with an embodiment of the present invention;

[0020] Fig. 2 illustrates an exploded view of the wearable device with an energy harvesting module, in accordance with an embodiment of the present invention;

[0021] Fig. 3 illustrates a block diagram of a system for tracking and locating the wearable device, in accordance with an embodiment of the present invention; and

[0022] Fig. 4 illustrates a flow chart of a method for tracking and locating the wearable device in accordance with an embodiment of the present invention.DETAILED DESCRIPTION OF THE INVENTION

[0023] The description set forth below in connection with the appended drawings is intended as a description of various embodiments of the present disclosure and is not intended to represent the only embodiments in which the present disclosure may be practiced. Each embodiment described in this disclosure is provided merely as an example or illustration of the present disclosure, and should not necessarily be construed as preferred or advantageous over other embodiments. The description includes specific details for the purpose of providing a thorough understanding of the present disclosure. However, it will be apparent to those skilled in the art that the present disclosure may be practiced without these specific details.

[0024] Exemplary embodiments now will be described with reference to the accompanying drawings. The disclosure may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey its scope to those skilled in the art. The terminology used in the detailed description of the particular exemplary embodiments illustrated in the accompanying drawings is not intended to be limiting. In the drawings, like numbers refer to like elements.

[0025] It is to be noted, however, that the reference numerals used herein illustrate only typical embodiments of the present subject matter, and are therefore, not to be considered for limiting its scope, for the subject matter may admit to other equally effective embodiments.

[0026] The specification may refer to “an”, “another”, “one” or “some” embodiment(s) in several locations.

[0027] This does not necessarily imply that each such reference is to the same embodiment(s), or that the feature only applies to a single embodiment. Single features of different embodiments may also be combined to provide other embodiments.

[0028] As used herein, the singular forms “a”, “an” and “the” are intended to include the plural forms as well, unless expressly stated otherwise. It will be further understood that the terms “includes”, “comprises”, “including” and / or “comprising” when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof. It will be understood that when an element is referred to as being “connected” or “coupled” to another element, it can be directly connected or coupled to the other element or intervening elements may be present. Furthermore, “connected” or “coupled” as used herein may include operatively connected or coupled. As used herein, the term “and / or” includes any and all combinations and arrangements of one or more of the associated listed items.

[0029] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skills in the art to which this disclosure pertains. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

[0030] The detailed description includes specific details for the purpose of providing a thorough understanding of the present disclosure. However, it will be apparent to those skilled in the art that the present disclosure may be practiced without these specific details.

[0031] Locating small wearable devices such as smart rings, earbuds, or keys becomes difficult once their internal batteries are discharged, rendering conventional tracking methods like GPS or Bluetooth ineffective. Existing solutions rely heavily on powered components, which fail when the device is out of charge. This limitation often leads to the permanent loss of valuable items. The system addresses this challenge by integrating a passive communication module and an energy harvesting unit into the wearable device, enabling it to broadcast a unique identifier (UID) and be detected by nearby secondary devices even when the internal battery is depleted. By leveraging ambient energy sources and signal -based triangulation from commonnearby smart devices, the system enables accurate, real-time location tracking without relying solely on internal power, ensuring users can locate their devices anytime, anywhere.

[0032] Fig. 1 illustrates an exemplary environment of a wearable device transmitting location to other devices, in accordance with an embodiment of the present invention. According to an exemplary embodiment, the environment (100) for locating a wearable device may include the wearable device, a laptop (104), a smartphone (106), a smartwatch (108), a server (110), and a primary device (112). The wearable device is compact in size, and designed to monitor health data of a user, including physiological biomarkers and fitness activity. The wearable device may be a smart ring (102), a smartwatch, a bracelet, or a necklace. The description has been provided successively with reference to the smart ring (102).

[0033] The smart ring (102) may be made using a hypoallergenic material for allowing comfortable and continuous wear by the user. When the user misplaces or loses the smart ring (102) and an internal battery is depleted, the tracking mechanism of the smart ring (102) becomes active. The smart ring (102) is configured to extract energy from ambient sources such as radio frequency signals, thermal gradients from body heat or the environment, or available light.

[0034] The smart ring (102) is configured to broadcast a unique identifier (UID) and a location of the smart ring (102) at predefined intervals. This UID is detectable by a network of secondary devices, such as a laptop (104), smartphone (106), or smartwatch (108), each of which is capable of scanning for and receiving the UID signal. Upon detecting the UID, each secondary device measures the received signal strength and calculates an estimated location of the smart ring (102). The secondary devices then transmit the received UID and location data to the server (110) or the primary device (112).

[0035] The location of the smart ring (102) is rendered to the user via a graphical user interface (GUI) on the primary device (112). This allows the user to visually track and recover the misplaced ring, even in the absence of battery power in the ring itself by utilizing ambient energy and a decentralized network of commonly available smart devices.

[0036] According to another embodiment, the determined location data from the secondary devices is transmitted to a server (110). The server (110) may include data processing algorithms, location estimation modules, and storage capabilities to manage and correlate location data in real time.

[0037] Fig. 2 illustrates an exploded view of the wearable device with an energy harvesting module, in accordance with an embodiment of the present invention. The smart ring (102) may be integrated with an energy harvesting module (200), a passive communication module (202), and an internal battery (204). The passive communication module (202) is configured to broadcast a unique identifier (UID), and the energy harvesting module (200) is configured to power the passive communication module (202) when the internal battery (204) is discharged. The smart ring (102) may transmit the UID even in low-power conditions using harvested ambient energy such as radio frequency, thermal, or light energy.

[0038] The energy harvesting module (200) may be configured to generate electrical energy from ambient environmental sources. The energy harvesting module (200) is operatively coupled to the passive communication module (202) and is specifically designed to provide sufficient power to enable the smart ring (102) to broadcast the unique identifier (UID), even when the internal battery (204) is fully discharged or unavailable. The energy harvesting module (200) may harvest energy by a process of capturing and converting ambient energy such as radio frequency (RF) signals, thermal gradients, or light into usable electrical energy to power low-energy components.

[0039] In an embodiment, RF energy may be harvested from nearby sources like cellular towers, Wi-Fi routers, or Bluetooth signals, using an antenna and rectifier circuit to convert electromagnetic waves into direct current (DC). Alternatively, the energy harvesting module may include thermoelectric generators to utilize body heat or environmental temperature differences. Light energy may also be harvested using miniature solar cells to capture indoor or outdoor illumination. The energy harvesting approach ensures that device tracking and location functionality remains operational even when the internal battery (204) is fully discharged, thereby enhancing reliability and eliminating dependence on manual recharging.

[0040] In an exemplary scenario, examples of suitable energy harvesting and storage technologies include piezoelectric elements, thermoelectric modules, and photovoltaic cells, along with energy storage components such as lithium-ion microbatteries, supercapacitors, or solid-state batteries. This harvested energy is sufficient to power the passive communication module (202) embedded in the smart ring (102), enabling it to periodically broadcast the unique identifier (UID) detectable by the secondary devices.

[0041] In an exemplary embodiment, the laptop (104), smartphone (106), and smartwatch (108) may serve as secondary devices that are configured to detect the UID broadcasted by the smart ring (102). The secondary devices are equipped with processing units and signal detection modules capable of determining the location of the smart ring (102) based on parameters such as signal strength. The secondary devices may periodically scan for the UID, and upon detection, compute an approximate location of the smart ring (102) using techniques such as Received Signal Strength Indicator (RSSI) triangulation.

[0042] The determined location and the UID of the smart ring (102) may then be transmitted to the primary device (112). The primary device (112) may be any suitable processing device, such as a smartphone or tablet, and may include a user interface for displaying the real-time location of the smart ring (102). This enables a user to monitor, track, and recover the wearable device efficiently, even when the device's internal battery is depleted. This implementation supports sustainable, maintenance-free operation and extends the usability of the device in real- world environments where charging may not be feasible.

[0043] Fig. 3 illustrates a block diagram of a system for tracking and locating the wearable device, in accordance with an embodiment of the present invention. The system (300) includes the smart ring (102), a plurality of secondary devices (302-1, 302-2,..., and 302-n) (referred herein after as the plurality of secondary devices (302)), the server (110), and the primary device (112). The smart ring (102) includes the passive communication module (202) and the internal battery (204). The internal battery (204) is configured to power the smart ring (102). In an embodiment, the internal battery (204) may be charged through Direct Current (DC) power.

[0044] Further, the passive communication module (202) may be a low energy communication module embedded within the smart ring (102). In some embodiments, when the internal battery (204) is discharged, the passive communication module (202) is powered by the energy harvesting module (200). The energy harvesting module (200) may power the passive communication module (202) by using ambient energy, such as radio frequency energy, thermal energy, or light. The passive communication module (202) transmit the unique identifier (UID) and the location corresponding to the smart ring (102). The UID includes identification details of the smart ring (102). The identification details are used to identify the smart ring (102). Further, the identification details may include a unique identification number of the smart ring (102).

[0045] The passive communication module (202) may be configured to communicate with the plurality of secondary devices (302). The passive communication module (202) may establish connection with the plurality of secondary devices (302) via a bluetooth (BLE), a Wi-Fi, or radio waves. Further, the plurality of secondary devices (302) may determine the location of the smart ring (102) by measuring the bluetooth or other radio signal strength.

[0046] In an embodiment, each of the plurality of secondary devices (302) is located near the smart ring (102). The plurality of secondary devices (302) may include one or more smartphone, smart watch, PC, laptop, tablet, etc. Further, each of the plurality of secondary devices (302) is configured to receive the UID and the location corresponding to the smart ring (102).

[0047] Further, the system (300) may include the server (110) and the primary device (112). The server (110) may be, but not limited to, a web server, a cloud server, an application server, etc. It should be noted that the server (110) and the primary device (112) are communicatively coupled via a bluetooth (BEE), Wi-Fi, internet, or radio waves. In an embodiment, the server (110) may be configured to receive the UID and the location corresponding to the smart ring (102) via each of the plurality of secondary devices (302). The server (110) may identify the smart ring (102) based on the UID. Further, the server (110) may process the location from each of the plurality of secondary devices (302) to determine an accurate location of the smart ring (102).

[0048] In another embodiment, the primary device (112) may be, but not limited to, a smartphone, a tablet, a computer, a desktop, or any other processing device. Further, the primary device (112) may include a communication module (304) configured to communicate with the plurality of secondary devices (302). The communication module (304) may be configured to receive the UID and the location corresponding to the smart ring (102) via each of the plurality of secondary devices (302).

[0049] Further, the primary device (112) may include a locating module (306) configured to determine the location of the smart ring (102). The locating module (306) may determine the location of the smart ring (102) by aggregating the location received from each of the plurality of secondary devices (302). Further, the primary device (112) may include a User Interface (UI) (308) configured to render the location and the UID of the smart ring (102) to a user. TheUI (308) may be, but not limited to, a Command Line Interface (CLI), a Graphical User Interface (GUI), a Web User Interface (WUI), etc.

[0050] Fig. 4 illustrates a flow chart of a method for tracking and locating the wearable device, in accordance with an embodiment of the present invention. The method (400) is implemented in the system (300) of FIG. 3. Further, steps of the method (400) are explained in detail through FIGs 1 to 3, therefore for the sake of brevity, the detailed explanation has been omitted here.

[0051] According to an embodiment, the method (400), at step 402, includes the wearable device (102) harvesting power based on ambient energy using an energy harvesting module, when a battery module integrated in the wearable device is discharged. The energy harvesting module may utilize ambient energy sources such as radio frequency (RF) signals, thermal gradients, or light. For example, the energy harvesting module may capture RF energy emitted from nearby smartphones or Wi-Fi routers, or convert body heat into electrical power using thermoelectric components. In an embodiment, if ambient RF signals are sufficiently strong, the energy harvesting module may activate the passive communication module of the wearable device to transmit a signal comprising a unique identifier (UID) and location data to nearby secondary devices. If sufficient ambient energy is not available, the wearable device may continue scanning for viable ambient sources until adequate energy is harvested to enable communication.

[0052] According to an embodiment, the method (400), at step 404, includes the wearable device activating the passive communication module integrated in the wearable device to transmit a signal. The signal comprises at least one of UID and location of the wearable device. The activation may occur when the energy harvesting module supplies sufficient power, particularly in scenarios where the battery module is depleted. The passive communication module may operate using low-energy communication protocols such as Bluetooth Low Energy (BLE), Wi-Fi, or other radio frequency technologies. In an embodiment, the transmitted signal comprises at least one of the unique identifiers (UID) associated with the wearable device and the location. The UID may uniquely identify the device within a tracking system, while the location data may be estimated based on prior position information or derived from nearby secondary devices capable of computing the device’s approximate location using signal strength metrics.

[0053] According to an embodiment, the method (400), at step 406, includes transmitting, by the passive communication module, the signal to one or more devices proximate to the wearable device. The proximate devices may include smartphones, smartwatches, laptops, or tablets equipped with compatible wireless communication interfaces, such as Bluetooth Low Energy (BLE), Wi-Fi, or near-field communication (NFC). The transmission may occur periodically or in response to a trigger event, such as successful energy harvesting or detection of a nearby device. The transmission may employ low-power broadcasting protocols to ensure energy efficiency while maintaining signal integrity.

[0054] According to an embodiment, the method (400), at step 408, includes receiving, by the one or more devices, the signal from the passive communication module. The one or more devices such as a smartphone, smartwatch, laptop, or tablet are equipped with wireless receivers capable of detecting signals broadcast over Bluetooth Low Energy (BLE), Wi-Fi, or other short-range communication protocols.

[0055] Upon receiving the signal, the proximate devices may verify its integrity, identify the transmitting wearable device based on the UID, and determine whether additional data such as signal strength or timestamp should be logged for location estimation. In some embodiments, the proximate devices may also trigger a companion application or background service that processes the received signal and initiates further actions, such as relaying the data to a server or displaying the last known location on a user interface.Technical Advancement

[0056] One of the many technical advantages of the proposed invention is to enable the tracking and locating of a wearable device, such as a smart ring, even when its internal battery is discharged. The proposed invention utilizes an energy harvesting module to autonomously power a passive communication module, eliminating the need for frequent charging or active power sources. The system provides seamless, low-power communication with nearby smart devices, enabling real-time tracking with or without GPS. The proposed invention further offers integration with a user’s smartphone or computing device to display the location and identity of the lost wearable device, enhancing device recoverability through a dedicated user interface.

[0057] Aspects of the present disclosure may be implemented as computer program products that comprise articles of manufacture. Such computer program products may include one ormore software components which are implementable by a processor or group of processors and said software components may include, for example, applications, software objects, methods, data structure, and / or the like. In some embodiments, a software component may be stored on one or more non-transitory computer-readable media, which computer program product may comprise the computer-readable media with software component, comprising computer executable instructions, included thereon.

[0058] The figures of the disclosure are provided to illustrate some examples of the disclosure described. The figures are not to limit the scope of the depicted embodiments or the appended claims. Aspects of the disclosure are described herein with reference to the disclosure to example embodiments for illustration. It should be understood that specific details, relationships, and method are set forth to provide a full understanding of the example embodiments. One of ordinary skill in the art recognize the example embodiments can be practiced without one or more specific details and / or with other methods.

[0059] Similarly, while operations are depicted in the drawings in a particular order, this should not be understood as requiring that such operations be performed in the particular order shown or in sequential order, or that all illustrated operations be performed, to achieve desirable results. In certain circumstances, multitasking and parallel processing may be advantageous. Moreover, the separation of various system components in the embodiments described above should not be understood as requiring such separation in all embodiments, and it should be understood that the described program components and systems can generally be integrated together in a single software product or packaged into multiple software products.

[0060] It is to be understood that the disclosure is not to be limited to the specific embodiments disclosed, and that modifications and other embodiments are intended to be included within the scope of the appended claims. Although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation, unless described otherwise.

Claims

WE CLAIM:

1. A wearable device, comprising: one or more sensors configured to measure biomarkers of a user; a passive communication module (202) configured to communicate with one or more devices proximate to the wearable device; an internal battery (204) configured to supply power to the one or more sensor and the passive communication module (202); and an energy harvesting module (200) coupled to the internal battery (204) and the passive communication module (202), wherein the energy harvesting module (200) is configured to: harvest power based on ambient energy, when the internal battery (204) is discharged; and activate the passive communication module (202) to transmit a signal to the one or more device proximate to the wearable device, wherein the signal comprises at least one of UID and location of the wearable device.

2. The wearable device of claim 1, wherein the wearable device is a smart ring.

3. The wearable device of claim 1, wherein the one or more devices proximate to the wearable device includes at least one of: one or more secondary devices (302), one or more of primary device or a server.

4. The wearable device of claim 3, wherein the secondary devices (302) are configured to: receive the signal including at least UID of the wearable device; determine location of the wearable device based on signal strength; and transmit the UID of the wearable device and location to the server or primary device associated with the wearable device.

5. The wearable device of claim 1, wherein the energy harvesting module (200) is configured to harvest energy selected from at least one of a radio frequency energy, thermal energy, solar energy, or kinetic energy.

6. A system, comprises: a wearable device configured to transmit a signal; and one or more devices configured to receive the signal, wherein the wearable device, comprises: one or more sensors configured to measure biomarkers of a user; a passive communication module (202) configured to communicate the with the one or more devices proximate to the wearable device; an internal battery (204) configured to supply power to the one or more sensor and the passive communication module (202); and an energy harvesting module (200) coupled to the internal battery (204) and the passive communication module (202), wherein the energy harvesting module (200) is configured to: harvest power based on ambient energy, when the internal battery (204) is discharged; and activate the passive communication module (202) to transmit the signal to the one or more device proximate to the wearable device, wherein the signal comprises at least one of UID and location of the wearable device.

7. The system of claim 6, wherein the wearable device is a smart ring.

8. The system of claim 6, wherein the one or more devices proximate to the wearable device includes at least one of: one or more secondary devices (302), one or more of primary device or a server.

9. The system of claim 8, wherein the secondary devices (302) are configured to: receive the signal including at least UID of the wearable device;determine location of the wearable device based on signal strength; and transmit the UID of the wearable device and location to the server or primary device associated with the wearable device.

10. The system of claim 6, wherein the energy harvesting module (200) is configured to harvest energy selected from at least one of a radio frequency energy, thermal energy, solar energy, or kinetic energy.

11. A method, comprising: harvesting power based on ambient energy using an energy harvesting module (200), when an internal battery (204) integrated in a wearable device is discharged; activating a passive communication module (202) integrated in the wearable device to transmit a signal, wherein the signal comprises at least one of UID and location of the wearable device; transmitting, by the passive communication module (202), the signal to one or more devices proximate to the wearable device; and receiving, by the one or more devices, the signal from the passive communication module (202).

12. The method of claim 11, wherein the wearable device is a smart ring.

13. The method of claim 11, wherein the at least one or more devices proximate to the wearable device includes at least one of: one or more secondary devices (302), one or more of primary device or a server.

14. The method of claim 13, wherein the secondary devices (302) are configured to: receive the signal including at least UID of the wearable device; determine location of the wearable device based on signal strength; and transmit the UID of the wearable device and location to the server or primary device associated with the wearable device.

15. The method of claim 13, wherein the energy harvesting module (200) is configured to harvest energy selected from at least one of a radio frequency energy, thermal energy, solar energy, or kinetic energy.

Images