JSC-802R High-Precision RTK GNSS Personnel Tracking Badge with 4G or LoRaWAN

The JSC-802R is a wearable RTK GNSS personnel tracker developed for high-precision outdoor worker positioning and industrial safety management. It combines multi-constellation satellite positioning, optional RTK correction data, 4G or LoRaWAN communication, SOS alarms and motion-based safety monitoring in a compact wearable terminal.

Unlike a standard employee GPS badge that only provides approximate location information, the JSC-802R is designed for projects that require more precise outdoor personnel positioning. When the device has a clear satellite view and receives valid RTK correction data, it can provide centimeter-level location results under suitable operating conditions.

The tracker is suitable for construction sites, open-pit mines, ports, container yards, oil and gas fields, power facilities, large farms and industrial parks. Workers can wear it using a lanyard, clip or customized mounting accessory.

Two communication versions are available. The 4G version sends location and alarm data directly to the server through a cellular network. The LoRaWAN version communicates with a nearby LoRaWAN gateway and does not require a SIM card in every personnel badge.

RTK GNSS Outdoor Personnel Positioning

RTK, or Real-Time Kinematic positioning, improves standard GNSS accuracy by applying correction data from a reference station or network correction service.

A conventional GPS personnel tracker normally provides meter-level positioning. This may be sufficient for general workforce visibility but may not accurately distinguish between workers operating near adjacent machines, restricted zones or closely spaced work areas.

The JSC-802R can use RTK correction data to improve outdoor positioning accuracy. Under clear-sky conditions, with suitable satellite geometry and stable correction data, the device can provide centimeter-level positioning for safety and operational applications.

Supported positioning capabilities can include:

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  GPS satellite positioning
  
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  BeiDou satellite positioning
  
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  GLONASS positioning
  
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  Galileo positioning
  
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  Multi-constellation GNSS
  
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  Network RTK correction
  
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  Local RTK base-station correction
  
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  Standard GNSS fallback
  
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  Configurable positioning intervals
  
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  Motion-triggered positioning
  
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  Emergency high-frequency reporting
  

Actual accuracy depends on the selected GNSS module, antenna design, satellite visibility, correction service, surrounding structures and installation conditions.

4G and LoRaWAN Communication Options

The JSC-802R can be configured with either 4G cellular communication or LoRaWAN communication. The appropriate version should be selected according to network coverage, operating area, battery-life requirements and deployment scale.

4G Personnel Tracker Version

The 4G version connects directly to the mobile network and uploads data to the server without requiring an on-site LoRaWAN gateway.

It is suitable for:

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  Construction workers moving between different sites
  
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  Field engineers working across wide geographic areas
  
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  Port and logistics personnel
  
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  Utility inspection teams
  
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  Road maintenance workers
  
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  Distributed outdoor personnel
  
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  Projects with reliable cellular coverage
  

Each 4G device normally requires a SIM card and an active data plan. Communication costs and power consumption depend on the reporting frequency, network signal and data volume.

LoRaWAN Personnel Tracker Version

The LoRaWAN version sends data to an on-site LoRaWAN gateway. The gateway then forwards the data to the server through 4G, Ethernet or Wi-Fi.

It is suitable for:

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  Fixed industrial parks
  
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  Open-pit mines
  
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  Large construction areas
  
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  Oil and gas facilities
  
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  Power plants
  
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  Ports and container yards
  
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  Large farms and outdoor operational zones
  
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  Projects involving hundreds or thousands of workers
  

The LoRaWAN badge does not require an individual SIM card. This can reduce recurring communication costs when many devices are deployed within the same managed area.

Available LoRaWAN frequency configurations include:

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  CN470
  
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  EU868
  
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  IN865
  
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  RU864
  
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  US915
  
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  AU915
  
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  KR920
  
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  AS923-1
  
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  AS923-2
  
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  AS923-3
  
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  AS923-4
  

The final frequency must comply with the radio regulations of the deployment country.

SOS Emergency Alarm for Outdoor Workers

The JSC-802R includes a physical SOS button that allows a worker to request assistance immediately.

When the SOS button is activated, the device can transmit:

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  Worker identification
  
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  Device identification
  
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  Alarm type
  
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  Alarm time
  
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  Current GNSS position
  
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  Latest valid RTK position
  
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  Battery status
  
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  Communication status
  

The platform displays the alarm on the personnel map and can notify supervisors through web alerts, mobile applications or customized interfaces.

SOS functionality is especially useful for lone workers, maintenance teams, security staff, construction personnel and employees operating in remote or hazardous outdoor locations.

Man-Down and Abnormal Inactivity Detection

A built-in motion sensor can monitor movement, posture and activity status. The firmware can be configured to detect suspected falls, prolonged tilt or abnormal inactivity.

Available safety rules may include:

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  Sudden fall detection
  
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  Man-down alarm
  
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  Prolonged tilt alarm
  
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  Abnormal inactivity alarm
  
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  No-movement timeout
  
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  Device-removal warning
  
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  Automatic emergency reporting
  
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  Configurable alarm delay
  
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  Alarm cancellation period
  
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  Repeated alarm transmission
  

The system can allow a short cancellation period before sending the final alert. This helps reduce false alarms caused by normal bending, sitting or accidental device movement.

Because motion-based alarms depend on wearing position and worker activity, alarm thresholds should be verified during a field trial.

Electronic Geofencing and Restricted-Area Alerts

The management platform allows administrators to create virtual boundaries around operational and restricted areas.

Supported geofence applications include:

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  Worker entry into a dangerous zone
  
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  Worker exit from an authorized work area
  
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  Access to restricted equipment
  
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  Approach to excavation zones
  
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  Entry into vehicle-only areas
  
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  Departure from an assigned patrol route
  
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  Arrival at an emergency assembly point
  
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  Overtime stay in a controlled zone
  

When a geofence rule is triggered, the platform records the worker, position, alarm time and event type.

RTK positioning can improve boundary determination in open outdoor areas where ordinary GPS accuracy may be insufficient.

Real-Time Personnel Monitoring Platform

The JSC-802R can connect to a web-based workforce safety platform, Android application and iOS application.

Platform functions can include:

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  Live personnel location
  
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  Worker status display
  
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  Historical route playback
  
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  RTK positioning-status display
  
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  SOS alarm management
  
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  Man-down alarm management
  
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  Electronic geofence configuration
  
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  Restricted-area monitoring
  
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  Low-battery alarms
  
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  Device-offline alarms
  
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  Employee profile management
  
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  Device-to-worker assignment
  
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  Department and team management
  
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  Multiple-site management
  
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  User permission management
  
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  Alarm history
  
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  Location-data export
  
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  API integration
  
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  Private server deployment
  

The platform can associate each device ID with the worker’s name, department, role, contact information and emergency details.

Historical Route Playback and Incident Review

The platform stores position reports according to the configured data-retention policy.

Authorized users can review:

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  Worker movement routes
  
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  Arrival and departure times
  
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  Time spent in specific areas
  
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  Geofence-entry records
  
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  SOS alarm locations
  
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  Man-down alarm locations
  
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  Device-offline periods
  
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  Changes in positioning accuracy
  
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  Last valid location before communication loss
  

Historical records can support incident investigation, safety reviews, patrol verification and workforce deployment analysis.

The location history should be managed according to applicable privacy, employee-monitoring and data-protection requirements.

Dynamic Reporting and Power Management

RTK positioning and frequent 4G transmission require more energy than occasional standard GPS reporting. The JSC-802R therefore supports configurable positioning and communication strategies.

Available power-management modes may include:

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  Fixed reporting interval
  
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  Motion-triggered reporting
  
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  Stationary low-power mode
  
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  Scheduled wake-up
  
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  Emergency high-frequency mode
  
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  Standard GNSS mode
  
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  RTK-on-demand mode
  
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  Low-battery reporting mode
  
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  LoRaWAN adaptive data rate
  
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  Remote parameter configuration
  

For example, the device can report less frequently while a worker remains stationary and automatically increase the reporting frequency when movement or an emergency is detected.

Battery life depends on:

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  RTK activation time
  
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  GNSS positioning interval
  
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  Data-upload interval
  
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  4G or LoRaWAN signal quality
  
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  Satellite reception conditions
  
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  Motion-sensor activity
  
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  Alarm frequency
  
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  Environmental temperature
  
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  Battery capacity
  
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  Firmware power-management settings
  

Battery-life claims should always be based on a defined reporting configuration and real deployment conditions.

Detailed Technical Specifications

General Information

Product model: JSC-802R

Product category: Wearable personnel tracking badge

Primary function: High-precision outdoor worker positioning and safety monitoring

Positioning environment: Outdoor and semi-open areas with sufficient satellite visibility

Application: Construction, mining, ports, utilities, energy, agriculture and industrial safety

Wearing options: Lanyard, chest clip, arm strap or customized holder

OEM and ODM: Supported

Positioning Specifications

Positioning technology: RTK GNSS and standard GNSS

Satellite systems: GPS, BeiDou, GLONASS and Galileo, depending on module configuration

RTK correction method: Network RTK or local reference station

RTK accuracy: Centimeter-level under suitable outdoor conditions

Standard GNSS accuracy: Meter-level under normal outdoor conditions

Positioning interval: Remotely configurable

Emergency positioning: High-frequency reporting after an SOS or safety alarm

Fallback mode: Standard GNSS positioning when RTK correction is unavailable

Location storage: Local storage supported during communication interruption

Data retransmission: Stored location records can be uploaded after network recovery

Communication Specifications

Communication version: 4G or LoRaWAN

4G network: Regional LTE configuration according to project requirements

2G fallback: Optional, depending on the selected cellular module and local network

LoRaWAN protocol: Regional configuration according to project requirements

LoRaWAN frequency bands: CN470, IN865, EU868, RU864, US915, AU915, KR920 and AS923 series

SIM-card requirement: Required for direct 4G communication

LoRaWAN SIM-card requirement: No SIM card required inside the badge

Gateway requirement: Required for the LoRaWAN version

Server protocol: TCP, UDP, MQTT, HTTP or customized protocol

API: REST API or customized integration

Firmware upgrade: OTA upgrade available according to project configuration

Remote commands: Supported

Safety Functions

SOS button: Supported

Man-down detection: Supported

Fall detection: Configurable

Inactivity detection: Configurable

Tilt detection: Configurable

Geofence alarm: Supported

Restricted-area alarm: Supported

Low-battery alarm: Supported

Device-offline alarm: Supported

Tamper or removal alarm: Optional

Local warning: Optional buzzer, vibration or LED indication

Sensor Configuration

Motion sensor: Six-axis accelerometer and gyroscope

SOS input: Physical emergency button

LED indicator: Power, network and alarm status

Vibration motor: Optional

Buzzer: Optional

NFC or RFID: Optional for employee identification

Temperature sensor: Optional

Power Specifications

Power source: Built-in rechargeable lithium battery

Battery capacity: Selected according to enclosure and operating requirements

Charging method: Magnetic charging, USB charging or charging dock, depending on version

Power protection: Overcharge, over-discharge and short-circuit protection

Power-saving modes: Deep sleep, motion wake-up, scheduled positioning and adaptive reporting

Low-battery notification: Supported

Battery status upload: Supported

Mechanical Specifications

Enclosure material: Industrial-grade ABS and PC, subject to final configuration

Protection level: IP67 or IP68 according to the selected enclosure

Installation method: Wearable or customized mounting

Color: Standard or customized

Logo: Printing, laser engraving or customized label

Dimensions: According to the selected JSC-802 enclosure

Weight: According to the battery, communication module and enclosure

Operating temperature: Subject to final component and battery configuration

Storage temperature: Subject to final product configuration

Application Scenarios

Construction Worker Tracking

The JSC-802R can monitor workers across large construction sites and send alerts when personnel enter excavation areas, crane operating zones or other restricted locations.

Open-Pit Mine Personnel Safety

RTK positioning can help distinguish workers operating near haul roads, mining vehicles, slopes and high-risk production areas in open-pit mines.

Port and Container Yard Tracking

The system can monitor personnel across outdoor loading areas, container yards and restricted vehicle routes.

Oil and Gas Field Operations

Remote workers can use SOS and man-down functions while supervisors monitor location and alarm status from the control center.

Power and Utility Maintenance

The device can be assigned to inspection workers, line-maintenance teams and personnel operating across outdoor substations or energy facilities.

Large Agricultural Operations

The JSC-802R can monitor field workers, ranch employees and maintenance teams operating across large farms or grazing areas.

Industrial Park Security Patrols

Historical routes and geofence records can support outdoor patrol verification and restricted-area management.

4G Deployment Architecture

For the 4G version, each badge contains a cellular communication module and SIM card.

The basic data flow is:

JSC-802R badge → 4G mobile network → application server → web platform or mobile application

This architecture is relatively simple and suitable for mobile workers or projects covering several geographically separated areas.

Before deployment, the customer should confirm:

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  Local mobile-network coverage
  
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  Supported LTE frequency bands
  
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  SIM-card availability
  
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  Data-plan cost
  
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  Reporting interval
  
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  Required battery life
  
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  Server address and communication protocol
  

LoRaWAN Deployment Architecture

For the LoRaWAN version, personnel badges communicate with one or more gateways installed within the project area.

The basic data flow is:

JSC-802R badge → LoRaWAN gateway → 4G, Ethernet or Wi-Fi backhaul → application server → management platform

This architecture eliminates the need for a SIM card in every badge and is suitable for large fixed sites.

Gateway planning should consider:

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  Site size
  
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  Terrain
  
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  Buildings and metal structures
  
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  Antenna height
  
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  Gateway installation position
  
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  Worker density
  
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  Required reporting frequency
  
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  Communication blind spots
  
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  Internet backhaul
  
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  Backup power
  

Actual LoRaWAN coverage must be verified through on-site testing. Theoretical coverage distance should not be used as the only basis for deployment.

RTK Deployment Requirements

To achieve high-precision RTK positioning, the project requires more than an RTK-capable badge.

The complete system may include:

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  RTK GNSS personnel tracker
  
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  RTK correction-data source
  
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  Local reference station or network RTK service
  
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  Communication channel for correction data
  
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  Application server
  
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  Personnel tracking platform
  
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  Outdoor digital map
  
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  Geofence configuration
  
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  Device and worker database
  

The customer should confirm whether a local RTK base station or an existing network correction service is available in the deployment country.

OEM and Private Platform Integration

Shenzhen Jinshengchang Technology Co., Ltd. provides customization services for the JSC-802 series.

Available services include:

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  RTK GNSS module selection
  
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  4G regional-band customization
  
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  LoRaWAN frequency customization
  
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  PCB and antenna optimization
  
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  Enclosure and wearing-accessory design
  
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  Firmware development
  
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  Communication-protocol customization
  
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  API development
  
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  Private server deployment
  
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  Web-platform customization
  
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  Android and iOS application customization
  
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  Customer logo and interface branding
  
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  Multilingual platform development
  
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  Integration with access-control systems
  
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  Integration with video-surveillance systems
  
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  Integration with emergency-dispatch platforms
  

The system can be connected to the lora8 platform or deployed on a customer-controlled Linux server.

Important Accuracy Information

RTK centimeter-level positioning is intended primarily for outdoor environments with a clear satellite view.

Buildings, roofs, tunnels, dense trees, metal structures and underground environments can block or reflect satellite signals and reduce accuracy.

The JSC-802R should not be marketed as an indoor centimeter-level positioning device unless an additional dedicated indoor positioning technology is integrated.

When RTK correction data become unavailable, the device can continue operating with standard GNSS positioning, but the accuracy will normally return to the meter level.

Final positioning performance must be confirmed through field testing at the actual project location.

Why Choose the JSC-802R?

The JSC-802R combines high-precision outdoor positioning, industrial personnel safety functions and flexible communication in one wearable device.

Key advantages include:

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  RTK GNSS outdoor positioning
  
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  4G or LoRaWAN communication
  
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  No individual SIM card for the LoRaWAN version
  
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  SOS emergency alarm
  
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  Man-down and inactivity detection
  
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  Electronic geofencing
  
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  Historical route playback
  
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  Configurable reporting intervals
  
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  Offline storage and data retransmission
  
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  API and private server integration
  
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  OEM and ODM customization
  
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  Web, Android and iOS management
  
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  Suitable for large industrial deployments
  

Frequently Asked Questions

Can the JSC-802R provide centimeter-level positioning?

Yes. The RTK version can provide centimeter-level positioning under suitable outdoor conditions with sufficient satellite visibility and valid RTK correction data. Final accuracy depends on the environment and system configuration.

Can it provide centimeter-level positioning indoors?

No. RTK GNSS depends on satellite signals and is primarily intended for outdoor use. Indoor centimeter-level positioning requires an additional technology such as UWB, which is not included in this version.

Does the LoRaWAN version require a SIM card?

No. The LoRaWAN badge sends its data to a LoRaWAN gateway and does not require an individual SIM card. The gateway still requires an internet connection through 4G, Ethernet or Wi-Fi.

Does the 4G version require a SIM card?

Yes. Each 4G badge normally requires a compatible SIM card and mobile-data service.

What happens if RTK correction data are interrupted?

The tracker can fall back to standard GNSS positioning. Location data can continue to be reported, but the accuracy will normally change from centimeter level to meter level.

Can the device be connected to a private server?

Yes. The JSC-802R supports customized communication protocols, API integration and private Linux server deployment.

Can the platform manage multiple project sites?

Yes. The platform can manage multiple companies, projects, departments, sites, user roles and device groups.

Can the enclosure and firmware be customized?

Yes. OEM and ODM services are available for hardware, firmware, enclosure, wearing method, communication protocol, logo, application and platform.