Product Info
PHR‐8Pin M8Pin Function Color
7 3 A3 White
8 8 GND Black
Additional Peripherals
Signal DeviceOS 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 MCUUSB 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 (6 to 30 VDC at 2A on the M8 connector, or 6 to 90 VDC
at 2A 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 MCUUSB connector.
The MCUUSB 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 GNSSUSB 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.