SOCIAL DISTANCE Intruding incident information including ID / time / duration recorded in tracking bracelet	CONTACT TRACING Bluetooth gateway received the contact broadcasting of bracelet and upload its to server. The server will store and analyze data and display relative information in display port.
	In the period of epidemic outbreak, the tracking bracelet can more accurately record the social track of user; and make a more rapid response to the infection time in the epidemic situation. Wearing bracelets when get out, user can clock in just before leave home. And the bracelet will broadcast its own ID (including health status code). The surrounding bracelets will receive this information, and mark the RSSI signal strength, and time mark. The records will temporarily packaged locally and can be sent to the server through AP device.
In background server, the RSSI signal will be converted into distance parameters. With the location parameters, user can locate through the map. In some public places, detectors can be installed to detect bracelet status. And once detected any suspicious status, the detectors will alarm. If anyone is infected, relevant experts can modify the bracelet status on the server through the AP device. When two bracelets are within a dangerous distance, if one of them is suspected or infected, the bracelet will alarm in advance.
Product Introduction 1. Bluetooth gateway
.Automatic search The gateway has been powered on will automatically establish a TCP connection with the set server and start the uninterrupted BLE searching function, which will feedback the MAC address, device name, broadcast type, broadcast content and real-time signal strength of the BLE devices around to the server in time. .Support various devices Any devices that conform to the BLE specification, the BLE gateway can monitor them. .Free operating cost Bluetooth adopt the 2.4G frequency band that is open globally. Operating cost is free.	Product Name  Bluetooth gateway  Bluetooth Specification  Bluetooth V5.0  Frequency Range  2.402G ~ 2.480GHz  Bluetooth Protocol  LC、LM、L2CAP、ATT、GATT  Internet Protocol  TCP/IP、DHCP  Average power consumption  120mA@5V  Scan Distance  30M  Working Temperature  -20~65℃  Size  106mm * 106mm * 30mm
Product Introduction 2. Detection Device
Power consumption  Working mode  Power consumption  Broadcasting(interval 500ms)+scanning  4mA  Dormancy (Not moving for a long time)  55uA
Description of indicator light  Unconnected state  Working mode  Charge mode  Indicator light status  Working  uncharged  Blink 1 time every 2S  charging  Blink 3 times every 2S  Full  Blink 1 time every 2S  Dormancy  uncharged  Distinguish  charging  Blink 3 times every 4S  Full  Ever bright
Connected state  Working mode  Charge mode  Indicator light status  Working  uncharged  Blink 2 times every 2S  charging  Blink 4 times every 2S  Full  Blink 2 times every 2S  Dormancy  uncharged  Blink 2 times every 4S  charging  Blink 4 times every 4S  Full  Blink 2 times every 4S
Working frequency: ISM frequency 2.402～2.480GHz Bluetooth standard: V5.0BLE Spread spectrum: FHSS Voltage:3.6－4.2V Transmit power:0dBm The transmission distance: 20M in open air Receiving sensitivity: ＜－95dBm at ＜ 0.1% BER Working temperature:－20゜C ~ 60゜C Power supply: 1pc LIR2032 button rechargeable lithium battery Size：φ38.2*10.3mm Antenna specifications: 2.4G, 50Ω Safety certification: AES 128bit
3. Software system

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