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Laird Sentrius BT710 User manual

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A
™
Version 0.4
https://www.lairdconnect.com/iot-devices/iot-
sensors/sentrius-bt7x0-tracker-multi-sensor
2
© Copyright 2020 Laird Connectivity, Inc.
All Rights Reserved
Americas: +1-800-492-2320
Europe: +44-1628-858-940
Hong Kong: +852 2923 0610
Version
Date
Notes
Contributor
Approver
0.1
14 Aug 2020
Initial preliminary release
Scott Lederer
Chris Boorman
0.2
10 Sept 2020
Revised some functional definition and added
further operational overview. PRELIMINARY
Scott Lederer
Chris Boorman
0.3
18 Nov 2020
Updated functionality per GA1 firmware
Scott Lederer
Chris Boorman
0.4
3 Dec 2020
Updated to refer to Contact Tracer
Dave Drogowski
Chris Boorman
https://www.lairdconnect.com/iot-devices/iot-
sensors/sentrius-bt7x0-tracker-multi-sensor
3
© Copyright 2020 Laird Connectivity, Inc.
All Rights Reserved
Americas: +1-800-492-2320
Europe: +44-1628-858-940
Hong Kong: +852 2923 0610
1About this Guide...........................................................................................................................................................5
2Introduction..................................................................................................................................................................5
2.1 Product Overview................................................................................................................................................5
2.2 Specifications......................................................................................................................................................5
3Device Operation.........................................................................................................................................................6
3.1 Activating the Tracer............................................................................................................................................6
3.2 Battery Check......................................................................................................................................................6
3.3 Factory Reset......................................................................................................................................................6
3.4 Replacing Batteries .............................................................................................................................................6
3.5 Active Mode Operation........................................................................................................................................7
3.6 LED Blink Patterns..............................................................................................................................................7
3.7 Alarm Ranges.....................................................................................................................................................8
3.8 Alarm Styles........................................................................................................................................................8
3.9 Care and Maintenance ........................................................................................................................................8
4Contact Tracer Architecture..........................................................................................................................................9
4.1 Bluetooth Advertisements....................................................................................................................................9
4.1.1 1M PHY.........................................................................................................................................................9
4.1.2 1M PHY Scan Response................................................................................................................................9
4.1.3 Ad Record Types...........................................................................................................................................9
4.2 Bluetooth Advertisement Field Details................................................................................................................10
4.2.1 Company ID Field........................................................................................................................................10
4.2.2 Protocol ID Field..........................................................................................................................................10
4.2.3 Network ID Field..........................................................................................................................................10
4.2.4 Flags Field...................................................................................................................................................10
4.2.5 Device ID Field............................................................................................................................................10
4.2.6 Ad Record Type and Ad Record Data Fields.................................................................................................10
4.3 Tracer Configuration..........................................................................................................................................11
4.4 Parameter Selection Considerations ..................................................................................................................13
4.5 Firmware Updates.............................................................................................................................................13
4.6 Proximity Alarms ...............................................................................................................................................13
4.7 Data Logging.....................................................................................................................................................15
4.7.1 Data Log Entries..........................................................................................................................................15
5Mobile Application......................................................................................................................................................16
5.1 Overview...........................................................................................................................................................16
5.2 Using the Sentrius™ BT710 Mobile App.............................................................................................................16
6FCC and ISED Canada Regulatory Statements...........................................................................................................17
7CE Regulatory............................................................................................................................................................17
https://www.lairdconnect.com/iot-devices/iot-
sensors/sentrius-bt7x0-tracker-multi-sensor
4
© Copyright 2020 Laird Connectivity, Inc.
All Rights Reserved
Americas: +1-800-492-2320
Europe: +44-1628-858-940
Hong Kong: +852 2923 0610
8Ordering Information ..................................................................................................................................................18
9Label Info...................................................................................................................................................................18
10 Frequently Asked Questions.......................................................................................................................................19
11 Additional Assistance .................................................................................................................................................19
https://www.lairdconnect.com/iot-devices/iot-
sensors/sentrius-bt7x0-tracker-multi-sensor
5
© Copyright 2020 Laird Connectivity, Inc.
All Rights Reserved
Americas: +1-800-492-2320
Europe: +44-1628-858-940
Hong Kong: +852 2923 0610
This document providesa comprehensive guide onhowto configurethe Sentrius™BT710 Contact Tracerfunctionality, including
Bluetooth parameters, alert parameters, and general use for proximity sensing applications.
The Sentrius™BT710 Contact Tracer or “tag” is a battery powered, Bluetooth v5 integrated sensing
and proximity tracking platform enabling tag-to-tag proximity sensing and logging along with tag-to-
gateway communication for log upload. It contains several local alarm peripherals including four
bright red LEDs, a bi-color status LED, an audible speaker, and a vibration motor (on wrist-worn
models). Forproximity sensingapplicationswhere local alarm indication is desired,theBT710offers
several user-configurable optionsto suitthe use case. The BT710 is powered by Laird Connectivity’s
field proven BL653 BLE module that integrates Nordic Semiconductor’s nRF52833 SoC silicon.
Figure 1: Top of the Sentrius™BT710
1. Clasp
2. Status LED
3. Speaker
4. Alarm LEDs
5. Pushbutton
Note: Laird Connectivity has a comprehensive staff of design services engineers available to help customize the tracer.
Please contact your local Laird Connectivity sales representative for more details.
See the BT710 product brief for detailed specifications. It’s available from BT710 series product page or from the following link:
https://www.lairdconnect.com/documentation/product-brief-bt7x0-contact-tracer
1
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3
4
4
4
4
5
https://www.lairdconnect.com/iot-devices/iot-
sensors/sentrius-bt7x0-tracker-multi-sensor
6
© Copyright 2020 Laird Connectivity, Inc.
All Rights Reserved
Americas: +1-800-492-2320
Europe: +44-1628-858-940
Hong Kong: +852 2923 0610
The Sentrius™ BT710 is shipped with the battery installed and operating in a low power state called Shipment Mode.
When it arrives from the factory, the tracer is in shipment mode. To wake the device, press and hold the pushbutton for five
seconds until the alarm LEDsturn on and a speaker tone is emitted along with the status LED lighting green and a brief vibration
for devices equipped with that feature (startup sequence). This puts the tracer into Active Mode. The tracer blinks the status
LED yellow waiting for its internal clock to be set, either by the BT710 mobile app or a nearby gateway. If a gateway is not
available, connect the mobile app to automatically set the internal clock. Once in active mode with its clock set, the BT710 scans
for compatible nearby tracers and transmits BLE advertisements for other tracers to sense.
In active mode, the BT710 tracer can be configured using the associated Laird Connectivity BT710 mobile application. The
default configuration sets the tracer to periodically scan for and log other tracers. Additional parameters include BLE advertising
interval, RSSI sensing/proximity thresholds, proximity alarm timers, and alarm indicator styles.
There are two low power modes: Non-Active and Power-Save. The tracer automatically enters these modes based on motion
detection to extend battery life. User-configurable parameterscontrol timing for this feature. Separate BLE scanning parameters
can be set for each operating mode to scan less frequently in Non-Active mode and Power-Save mode. The timeouts for entry
into the low power modes is also adjustable on the settings tab of the app.
Figure 2 - Operating modes of the BT710 tracer
Press and hold the pushbutton for three seconds to perform a battery check. The BT710 lights up a number of its red alarm
LEDs to indicate approximate voltage level of the battery.
4 LEDs on: 75-100% battery life remaining
3 LEDs on: 50-75% battery life remaining
2 LEDs on: 25-50% battery life remaining
1 LED on: 0-25% battery life remaining
When the BT710 senses a battery below the low battery threshold parameter, it blinks the status LED quickly 3 times red at
each scan interval. A small beep sequence is also emitted occasionally as a reminder to change the battery.
If the button is held for more than 10 seconds, the status LED begins to rapidly blink yellow. Releasing the button performs a
factory reset. A factory reset erases all logs and resets all parameters to defaults. The BT710 goes through a reset cycle when
finished and emits the startup sequence LED pattern and beeps, followed by entry into active mode.
The battery is a 3-volt lithium of CR2477 type.
Note: The battery door cover is underneath the clasp on the backside of the tracker. A coin may be used to aid in removal.
https://www.lairdconnect.com/iot-devices/iot-
sensors/sentrius-bt7x0-tracker-multi-sensor
7
© Copyright 2020 Laird Connectivity, Inc.
All Rights Reserved
Americas: +1-800-492-2320
Europe: +44-1628-858-940
Hong Kong: +852 2923 0610
Figure 3 –BLE operations in Active mode
When in Active mode, the tracer sequences through a series of BLE operations continuously including Scan, Advertise, and
Connected. The Scan Interval parameter determines how much time passes between scan events, at which point the tracer
awakes from sleep and performs a BLE scan (discovery of other tracers) for a number of seconds defined by the Scan
Duration parameter. At each scan interval, the status LED blinks to indicate the tag is scanning (see the LED Patterns section
for details on LED blink patterns).
When not connected, the tracer advertises (transmits) data for other tracers to receive when scanning. The rate of transmit
events when performing the Advertise operation is determined by the Ad Interval parameter.
The advertisement data contains identifiers to help filter out non-tracer devices, including device ID, TX power, and other
status information. Flags in the advertisement indicate to gateway devices when a tracer has log data ready for download.
The tracer hardware uses a red/green status LED to indicate operating behavior to the user. The following table (Table 1)
describes the LED patterns used to indicate status.
Table 1: Status LED Blink Patterns
LED
Status LED Behavior
Description
Slow flashing yellow
Internal clock is not set, connect to mobile app or bring the tag near a
gateway to automatically set it
Fast flashing yellow
When holding the button for 10+ seconds, fast yellow flash indicates
release of the button will perform a factory reset
Green on startup
The status LED shows green briefly as part of the startup sequence
indicating the tag is running BT710 tracer firmware
Fast flash green
Green flash indicates the tag is scanning for presence of nearby tags
Three green flashes
Three quick green flashes indicates the data log is full
Three red flashes
Three quick red flashes indicates the battery is low
https://www.lairdconnect.com/iot-devices/iot-
sensors/sentrius-bt7x0-tracker-multi-sensor
8
© Copyright 2020 Laird Connectivity, Inc.
All Rights Reserved
Americas: +1-800-492-2320
Europe: +44-1628-858-940
Hong Kong: +852 2923 0610
The tracer is equipped to trigger alarms at one of 3 distances from other tracers. These
ranges are referred to as Range A, Range B, and Range C. Each range has its own
configurable RSSI threshold, providing flexibility to trigger different alarm indicators depending
on distance from remote tracers. Using the BT710 mobile app interface, tap and drag the letter
corresponding to the range to adjust, then fill in corresponding fields below to setup the alarm
configuration. Alarm 1 and Alarm 2 options allow setting different alarm indicators based on
the amount of time a remote tracer has been within the specified RSSI range.
The ranges are limited to be at least 4dBm apart from each other. The minimum range is -30
dBm (only Range A can be set to this value, due to the 4dBm range threshold difference). The
maximum alarm range is -95 (only Range C can be set to this value, due to the 4dBm range
threshold difference).
Several indicator styles are available providing control over how alarm LEDs, audible tones, and vibrationmotor feedback are
activated when an alarm is triggered. These styles are configurable using the Alarms tab of the BT710 mobile application.
When configuring the alarm style, the BT710 mobile application will trigger the new alarm style on the BT710 tracer to show
the new alarm style (note, “Save Changes” must still be pressed in order to apply the new alarm style).
Alarms are defined both by duration of proximity (Alarm 1 vs. Alarm 2) and by signal strength (RSSI) of each remote tag.
Indicator styles may be selected independently for Alarm 1 and Alarm 2 conditions. The following table (Table 2) describes the
styles available for each alarm indicator.
Table 2: Alarm indicator styles
Indicator
Style
Description/Pattern
Red Alarm LEDs
Off
Red Alarm LEDs remain off
Style 1
LEDs are lit in a clockwise pattern
Style 2
All red LEDs blink in unison
Style 3
Top/bottom fast blink; left/right fast blink
Style 4
Left/right fast sweep of red LEDs
Speaker Indicator
Off
No tones are emitted by the speaker
Style 1
Three fast chirps
Style 2
Three buzzer tones
Style 3
Two double-beep tones
Style 4
Four bright tones, repeated two times
Vibe Indicator
Off
No vibration will be triggered by the vibrationmotor
Style 1
One long vibration
Style 2
Two vibrations
Style 3
Several short-pulsed vibrations
Style 4
One long ripple vibration
Alarm Intensity
Low
Lowers intensity of speaker and vibration indicators
High
Normal intensity of speaker and vibration indicators
The tracer can be cleaned with a mild, non-abrasive detergent. The tracer is not IP-rated/waterproof, so do not immerse it in
water or cleaning fluids.
The tracer does not require any calibration.
https://www.lairdconnect.com/iot-devices/iot-
sensors/sentrius-bt7x0-tracker-multi-sensor
9
© Copyright 2020 Laird Connectivity, Inc.
All Rights Reserved
Americas: +1-800-492-2320
Europe: +44-1628-858-940
Hong Kong: +852 2923 0610
The Sentrius™ BT710 advertises an identifying beacon used by other nearby BT710 compatible Bluetooth tracking devices and
gateways to log proximity to the tracer. This advertisement includes information such as a user configurable device identifier, a
hardware identifier, and current status of the Bluetooth tracking device.
You can configure a tracer using a Bluetooth connection andthe Laird Connectivity Sentrius™BT710 mobile application.
The following tables describe the data available in the advertisements of the BT710 tracer. Once a tracer is configured, it is
possible for a mobile app or gateway to connect to the Bluetooth tracking device for configuration of parameters and/or data log
download.
The Bluetooth tracking device can be configured to transmit with an output power of -20 to +8 dBm.
Table 3: 1M PHY
Byte
Description
Value/Notes
0
0x02
Length (0x02)
1
GAP_ADTYPE_FLAGS
Type (0x01)
2
GAP_ADTYPE_FLAGS_BREDR_NOT_SUPPORTED
Data
3
0x1b (27)
Length (length is not included in overall length)
4
GAP_ADTYPE_MANUFACTURER_SPECIFIC
0xFF (Type)
5
Company ID 1
0x77 (Laird)
6
Company ID 2
0x00
7
Protocol ID LSB
0x81 (Identifies the advertisement format)
8
Protocol ID MSB
0xFF
9
Network ID LSB
Assigned during configuration. Default is 0xFFFF
10
Network ID MSB
This can be used for filtering advertisements
11
Flags LSB
Indicate the current state of the system
12
Flags MSB
See: 4.1.4 Flags
13-18
Device ID
Random static Bluetooth address (0 is LSB)
19
Ad Record Type
See: 4.1.3 Ad Record Types
20-30
Ad Record Data
Determined by value of Ad Record Type above
Table 4: 1M PHY scan response
Byte
Description
Value/Notes
0
DEVICE_NAME
0x08 or 0x09
1-11
Device name, e.g. BT710-AABB
Max Complete Name (0x09) is 12 characters
Table 5: Advertisement record types
ID
Event
Data
Format
0x00
Tracking Ad
https://www.lairdconnect.com/iot-devices/iot-
sensors/sentrius-bt7x0-tracker-multi-sensor
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© Copyright 2020 Laird Connectivity, Inc.
All Rights Reserved
Americas: +1-800-492-2320
Europe: +44-1628-858-940
Hong Kong: +852 2923 0610
This is always 0x0077, the Company ID for Laird Connectivity.
This is always 0xFF81, the protocol for the BT510-CT and BT710 tracers.
This is user programmable via the NETWORK_ID parameter. Defaults to 0xFFFF.
Table 6: Flags field
Flag Bit
Name
Description
Bit 0 (0x0001)
HAS_EPOCH_TIME
0
Clock time not set
1
Clock time set
Bit 1 (0x0002)
HAS_LOG_DATA
0
Data log not ready
1
Data log ready for download
Bit 2 (0x0004)
RESERVED
0
Reserved
1
Motion Reserved
Bit 3 (0x0008)
LOW_BATTERY
0
Battery good
1
Battery low
Bit 4 (0x0010)
DATALOG_FULL
0
Datalog is not full
1
Datalog is full
This is the device ID currently advertised by the tracker.
The Ad Record Type byte indicates the format of the remaining bytes to follow in the advertisement data (the Ad Record Data).
The list of defined Ad Record Types and corresponding data format is displayed in the following table (Table 7).
Table 7: 0x10 - Ad Tracking Record
Field Name
Size (Bytes)
Data Type
Description
Profile
1
uint8
User programmable device type category
Epoch Time
4
uint32
Time since a known reference point in seconds
TX Power
1
int8
TX power setting of the radio (-40 to 8)
Motion
1
uint8
0: No motion present, 1: Motion present
HW Model ID
1
uint8
0x00 –BT510
0x10 –BL654 DVK
0x20 –BL653 DVK
0x30 –BT710
0x40 –MG100