Tracker SoM first board

This tutorial shows how to make a simple base board for the Tracker SoM that has a number of features from the Tracker Carrier Board (used in the Tracker One), however can easily be modified to fit your needs.

The full tutorial can be found in the documentation.

You can download the files associated with this app note as a zip file.

Standard features:

SETUP and MODE buttons
RGB status LED
Charge LED
MCU USB connector
NFC antenna connector

Features from the Tracker Carrier Board/Tracker One (all are optional):

GNSS LED
Thermistor
USER button
B8B-PH connector for connecting to an M8 connector
10-pin SWD/JTAG debug connector
SPI FRAM

Other features:

CAN termination enable jumper
Ability to add a mezzanine card for expansion including all ports, GPIO, CAN, and power options
Optional GNSS/RTC backup battery (CR1220) with DIP switch to enable/disable
GNSS and cellular USB connectors (optional)
Fits in an off-the-shelf IP67 weather-resistant enclosure
Simple two-layer board is inexpensive to fabricate and can be developed in the free version of Eagle CAD

Note:

First board and basic design examples are intended to be easily hand-assembled on inexpensive 2-layer circuit boards using easily available parts. They are not intended to be reference examples of best practices for electronic design.

Board diagram

Labeled

Item	Description
1	SWD/JTAG 10-pin debug connector
2	NFC Antenna U.FL
3	USER button (A1)
4	RGB Status LED
5	RESET button
6	GNSS LED, blue (A2)
7	MODE button
8	Charge LED, orange
9	GNSS/RTC battery, CR1220
10	LiPo battery connector, JST-PH
11	VIN Power Input, 3.9 - 17 VDC
12	GNSS/RTC battery switch
13	Trace jumpers for A0, A1, A2
14	CAN Termination jumper (0.1")
15	B8B-PH connector to M8 connector
16	MCU USB (Micro B)
17	Expansion Connector Left
18	Expansion Connector Right
19	GNSS USB (Micro B)
20	SPI FRAM
21	Cellular USB (Micro B)
22	Thermistor
23	Tracker SoM

In enclosure:

Enclosure

With mezzanine expansion board installed:

With mezzanine

For information on production soldering and stencils, see AN036 LCC Module SMT for information about SMT processes for LCC (Leadless Chip Carrier) devices such as the Tracker SoM.