Tag Leonardo iMU

Product Stage: END OF LIFE


  • Decawave UWB Radio, True Location

  • Bluetooth Low Energy, BLE

  • Near Field Communication, NFC 

  • Wireless Charge

  • Configurable via web browser and RTLS Studio

  • 300 mAh Li-pol battery

  • 9-axis IMU (gyroscope / magnetometer / accelerometer)  

  • Barometer 

Tag Leonardo is an active mobile locator providing superior accuracy in real-time. Its position could be reported from milliseconds to minutes covering broad spectrum of applications from industrial projects to livestock. Battery lifetime goes up to years.

Feature Set



🎯 Accurate positioning based on integrated UWB radio. Tag emits UWB blinks and RTLS provides precise True Location via API.


🔋 Motion detection unit enables to save energy. The tag may transmit only during the movement.


📥 Bluetooth interface is used for wireless firmware update.


🔧 Tag Leonardo Asset is configured wirelessly through RTLS Studio or via Android device through NFC interface. 

NFC: Provides zero-spend energy reconfiguration. Tag Leonardo Asset might be reconfigured even without battery.




📤Provides raw data from inertial unit for custom processing like hit/fall detection, jumps etc. or sensor fusion and 3D orientation.


⚙️Provides raw atmospheric pressure data or could be used for direct Z-axis estimation. Available only for Tag Leonardo IMU

The only difference between Tag Leonardo iMU and Tag Leonardo Personal are additional sensors: 9-axis inertial unit and barometer equipped with Tag Leonardo iMU.   

Switch On the Tag

Tag is initialized after it is turned on by holding the button for two seconds. For more info about the button functionality please continue here

If the tag's battery is depleted, it is powered ON automatically during the charging once the battery voltage reaches 3.3 V.

After the initialization phase, the tag sends location blink message periodically with given refresh interval. For time between position updates, the Tag goes into sleep modes. There are several sleep modes available suitable for different use-cases, please read more information here.   

The blink message is received by set of Anchors and it is forwarded to RTLS Studio via Ethernet of WiFi backhaul, where position is calculated. The blink message can be optionally equipped with sensor data. All the data is further disseminated trough the API.  First steps with Sewio Real Time Location System are described here.

Tag Battery

To read more about Tag's battery see section Tag Battery.

Also, see section about Charging and Storage Tag recomendation.  

Number of Tags within RTLS System

Please read following section.

RF Profile

Please read following section.

Technical Parameters


46 x 55 x 17


30 g

Power Supply

Internal Li-pol 300 mAh

Operating Conditions

-20  ~  60 °C

20 – 85% humidity without condensation

Charging Temperature0  ~ 45 °C
Charging DeviceOnly Qi compliant charger.
Charging Time / Current5.5h / 73mA

Warm-up Time


Maximum Refresh Interval50ms / 20Hz
Absolute Maximum Refresh Interval*10ms / 100Hz



Warehouse Manufacturing


Sports Tracking


UWB, Channel 5

6500 MHz / -41.3dBm

BlueTooth Low Energy  

2400 MHz


*not recommended - might lead to sub-optimal server performance

Part Number

SWT06-01-00Tag Leonardo iMU
SWT06-00-00Tag Leonardo iMU OEM

OEM Partnumbers does not includes enclosures and are delivered in ESD bag.

Please read Tag Leonardo OEM Terms of Use.

⚠️Safety and Proper Handling

  • Do not use deformed or damaged product or battery.
  • Do not modify the product.
  • Protect the product from excessive moisture.
  • Do not charge or use the product if liquid has entered.
  • Protect the product from excessive heat.
  • Do not expose the product to excessive pressure.
  • Do not over-discharge the Tag's battery, below 2.75V. Over-discharging can damage the performance of the Tag's battery. It should be noted that the battery would be at an over-discharged state by its self-discharge characteristics in case the cell is not used for long time. In order to prevent over-discharging, the battery shall be charged periodically to maintain between 3.7V and 4.1V.