Tracker One(003)

Tracker One

The Tracker One is a ready-to-go Tracker SoM carrier board with optional weatherproof enclosure.

  • Ready to go with IP67-rated enclosure.
  • GNSS Antenna Onboard: convenient high-gain GNSS antenna for easy access to GNSS signals.
  • Flexible Power Supply: easily add asset tracking to most devices. A wide 4.5-30V power supply copes with most power delivery systems. Also accepts 5V supply via USB-C. LiPo battery connector, charge LED, backup battery for GPS and battery-backed RTC. Supports up to 105V when connecting directly to the carrier board.
  • High-precision Thermistor with accuracy to 1%.
  • Extensible: IP67-rated M8 connector includes CAN Bus, UART, GPIO, and power for simple expansion.
  • USB-C for flashing, debugging and power with higher charging rates than Micro-USB or for use without an internal battery.
  • RGB LED for use as both a user-configurable device as well as Particle status information.
  • Backup Battery for RTC and GNSS.


Top and Bottom

Block Diagram

Block Diagram


Num ID Description
1 J1 Power and I/O connector
2 RTC Battery
3 LiPo Connector
5 RGB Status LED
6 USER User Button
9 MODE MODE button
10 CHRG LiPo charge status LED
11 NFC
12 JTAG/SWD debugging connector for nRF52 MCU
13 GNSS USB u-blox GNSS USB connection (Micro USB)
14 GNSS Antenna
15 LiPo Battery
16 Tracker SoM (on back side)

Power and I/O Connector (M8)

M8 Pin Function Function Function I/O
1 VIN3 I
5 Serial1 TX Wire3 SCL GPIO D9 IO1
6 Serial1 RX Wire3 SDA GPIO D8 IO1
7 Analog A3 GPIO D3 IO1

The IP67 M8, 8-pin, male pins with threaded barrel connector is accessible from the outside of the enclosure.

M8 connector

View as looking into the M8 connector on the outside of the enclosure.

1MCU GPIO is limited to 3.3V maximum.

2CAN Bus specifications can be found in the Tracker SoM datasheet. CAN Bus termination is provided on the carrier board.

34.5 to 30 VDC when using the M8 connector. 4.5 - 105 VDC when connecting directly to the board.

45V, 400 mA maximum. Controlled by the CAN_PWR GPIO.

The connector on the carrier board itself is is a JST B8B-PH-SM4-TB(LF)(SN), 8-position, 2mm pitch, male pins, shrouded. The mating connector is the JST PHR-8. The female sockets are available plain, with leads, and in pre-manufactured ribbon cable formats.

Additional Peripherals

Signal Device OS Description
THERM A0 NTC Thermistor
USER A1 USER button
GNSS_LOCK A2 GNSS lock indicator
GPIO1 A3 GPIO on power and I/O connector
MCU TX TX MCU serial TX, GPIO D9, Wire3 SCL
MCU RX RX MCU serial RX, GPIO D8, Wire3 SDA

Note: While the USER button exists inside the Tracker One, the Tracker One is a sealed unit and opening it will void the warranty and may affect certifications, thus it is not practical to use. It can be used with the Tracker Carrier Board.

Powering the Tracker Carrier Board

There are several options for powering the carrier board:

The MCU USB connector (USB-C). If using a laptop with a USB-A to USB-C cable and a 500 mA USB port, you should also use the LiPo battery. With an true USB-C port and cable, or a 2A tablet charger, you can power only by USB.

The VIN connector (5-30 VDC on the M8 connector, or 4.5 to 105 VDC to the B8B-PH connector on the board). This is useful with an external power supply.

The LiPo connector. This is typically used with a LiPo battery.

USB connectors

There are two USB connectors on the carrier board, however you most commonly will only use the MCU USB connector.

The MCU USB connector is connected to the nRF52 MCU and can be used for Serial debugging, flashing code, and setup by USB. It can also power the AssetTracker SoM. If using a laptop with a 500 mA USB port, you should also use the LiPo battery. With a 2A tablet charger, you can power only by USB.

The GNSS USB connector is connected to the u-blox NEO-M8U GNSS. It can be used for firmware upgrades or with the u-blox u-center application.

LED Indicators

The RGB LED default behavior is to display cellular signal quality:

  • Red blinking: Attempting to connect to the cellular network
  • Red: poor cellular signal
  • Yellow: average cellular signal
  • Green: good cellular signal

It will fast blink when connecting to the cellular network, and slow blink when connecting to the Particle cloud.

Alternatively the LED can be configured to the typical Particle color scheme (blinking green, blinking cyan, breathing cyan) via device or cloud configuration. Custom device firmware can provide other color schemes if desired.

The CHRG LED indicates the charge status:

  • Off: Not charging or no power
  • On: Charging
  • Blinking: Charge fault
  • Flickering: No battery

The GNSS LED indicates the GNSS fix status:

  • Blinking (1 Hz): Attempting to get a GNSS fix
  • On: Has a GNSS fix.

Tracker One Schematics

Will be provided at a later date.

Peripheral Details


The Tracker Carrier Board contains a 100K NTC thermistor, connected to A0. It is a Panasonic ERT-J1VR104FM connected high-side.


It can be read using the getTemperature() API.

Mechanical specifications

Dimensions and weight

Parameter Value Units
Width 88 mm
Length (case only) 146 mm
Length (including M8 connector) 154 mm
Thickness 33 mm
Weight g

Weight will be provided at a later date.

Case Dimensions (mm):

Case Dimensions


Case Bottom

Maximum Carrier Board Dimensions (mm):

Carrier Board Dimensions

Note: The Tracker Carrier Board has a smaller bottom tab to provide space for the M8 connector.

Product Handling

ESD Precautions

The Tracker SoM contains highly sensitive electronic circuitry and is an Electrostatic Sensitive Device (ESD). Handling an module without proper ESD protection may destroy or damage it permanently. Proper ESD handling and packaging procedures must be applied throughout the processing, handling and operation of any application that incorporates the module. ESD precautions should be implemented on the application board where the B series is mounted. Failure to observe these precautions can result in severe damage to the module!



This device must be treated as Waste Electrical & Electronic Equipment (WEEE) when disposed of.

Any WEEE marked waste products must not be mixed with general household waste, but kept separate for the treatment, recovery and recycling of the materials used. For proper treatment, recovery and recycling; please take all WEEE marked waste to your Local Authority Civic waste site, where it will be accepted free of charge. If all consumers dispose of Waste Electrical & Electronic Equipment correctly, they will be helping to save valuable resources and preventing any potential negative effects upon human health and the environment of any hazardous materials that the waste may contain.

Ordering Information

SKU Description Packaging
ONE402M Tracker One LTE M1/2G (NorAm), [x1] Each
ONE523M Tracker One LTE CAT1/3G/2G (Europe), [x1] Each
TCAR Tracker Carrier Board, [x1] Each

Revision history

Revision Date Author Comments
pre1 20 Apr 2020 RK Preview Release1
pre2 12 May 2020 RK Added partial dimensions
001 29 Jun 2020 RK First release
002 30 Jun 2020 RK CAN 5V is limited to 400 mA, not 500 mA
003 16 Jul 2020 RK Corrected M8 pinouts