Open Smartwatch

Current Status

• GPS Edition

  • PCB: to be tested, Pre-Released v3.1
  • 3D printable case: TODO

• Light Edition

  • PCB: Released v3.3
  • 3D printable case: ready

Click on an image below to see some demos:

Goals

The goal is to build an open source smartwatch, with step counting, GPS tracking and maps.

• ESP32 (Arduino programmable)
• GPS
• Time
• Sensors (Acceleromter, Step Counting)
• Li-Ion Battery
• USB Serial
• uSD Card (to provide open streetmap tiles)

Media Coverage

• hackster.io: Something ESPecially Impressive about the Open-Smartwatch Project

Join the Discussion

• Discussions happen on Discord: Pauls 3D Things
• Github organization: https://github.com/Open-Smartwatch

Hardware

GPS Edition

• PCB Source Files (KiCAD): https://github.com/Open-Smartwatch/open-smartwatch-gps
• BOM: https://htmlpreview.github.io/?https://github.com/Open-Smartwatch/open-smartwatch-gps/blob/master/docs/bom/osw-ibom_v.html
• 3D Files: https://github.com/Open-Smartwatch/3d-files/tree/master/case-gps

Light Edition

• PCB Source File (KiCAD): https://github.com/Open-Smartwatch/open-smartwatch-light
• Order PCB here: https://aisler.net/p/EBEIQYQD (Hint: AISLER sponsored the PCBs for protoyping this project, hence the logo on the PCB ;) )
• BOM: https://htmlpreview.github.io/?https://github.com/Open-Smartwatch/open-smartwatch-light/blob/master/docs/bom/osw-light-ibom.html
• 3D Files: https://github.com/Open-Smartwatch/3d-files/tree/master/case-light

The Big BOM

The parts for the GPS Edition are a super set of the Light Edition, so the following list covers the GPS Edition:

Part	Description	Aliexpress Link
U7	TTGO T-MICRO32	https://www.aliexpress.com/item/32869180373.html
U4	GC9A01	https://www.aliexpress.com/item/1005001382307998.html
U8	Quectel L96-M33	https://www.aliexpress.com/item/32920337260.html
D1	LED 0805	https://www.aliexpress.com/item/32947001269.html
U2	BMA400	https://www.aliexpress.com/item/4001043933700.html
U6	CH340E	https://www.aliexpress.com/item/4000171821951.html
U1	DS3231MZ	https://www.aliexpress.com/item/32962505279.html
U3	PSRAM	https://www.aliexpress.com/item/4000242457828.html
U10,U13	XC6209F332MR-G	https://www.aliexpress.com/item/4000687517883.html
U11	MCP73831T-2ACI/OT SOT23-5	https://www.aliexpress.com/item/32714249253.html
U9	TPS2115APWR	https://www.aliexpress.com/item/32612393464.html
U5	USB-Micro	https://www.aliexpress.com/item/32820570603.html
SW1, SW2, SW4, SW5	Buttons	https://www.aliexpress.com/item/32870278366.html
XS1	uSD Slot	https://www.aliexpress.com/item/1005001470093106.html
Q1	2N7002	https://www.aliexpress.com/item/32912312094.html
R1-RN	0603 SMD R	https://www.aliexpress.com/item/32298348854.html
C5,C6	1206 SMD C	https://www.aliexpress.com/item/32956133014.html
C1-CN	0603 SMD C	https://www.aliexpress.com/item/32841971485.html
R5	blob of solder	N/A

Further Material

This might be useful to give you an orientation of parts used to assemble this project:

Material	Aliexpress Link
Solder Paste	https://www.aliexpress.com/item/33057598049.html
Desoldering Wire	https://www.aliexpress.com/item/32958719300.html
Flux	https://www.aliexpress.com/item/4000480154850.html
Soldering Iron	https://www.aliexpress.com/item/32860309312.html
Hot Plate	https://www.aliexpress.com/item/32974173898.html

Software

Repositories:

• Open-Smartwatch OS: https://github.com/Open-Smartwatch/open-smartwatch-os, see Readme.md
• Open-Smartwatch Libraries: https://github.com/Open-Smartwatch/lib-open-smartwatch, see Readme.md

Super-Quick-Start Guide

Code

Here is how to add the OS to VScode with PlatformIO (recommended tutorial: https://youtu.be/JmvMvIphMnY (external link to YouTube)):

1. Clone this repository:

   git clone --recurse-submodules https://github.com/Open-Smartwatch/open-smartwatch-os.git

2. Open it with VSC:

   code open-smartwatch-os

If you experience troubles with cloning the linked submodules on macOS, check that your VSC is in the applications folder and not in the dowloads. Also, this might help: https://stackoverflow.com/questions/29955500/code-not-working-in-command-line-for-visual-studio-code-on-osx-mac

Build

1. Use Visual Studio Code with the PlatformIO extension
2. Change the config.h.example file in ./include to suit your data, and change it to a header file (remove .example).
3. Select the correct PlatformIO Project environment (pico32_GPS_EDITION of pico32_LIGHT_EDITION)
4. For uploading, you need to hold the lower left button and then click the reset button (top left). It enables flash mode, the display should get dark. Orientation for the display: USB insert at the left side.
5. Press the reset button after uploading
6. App changer works by holding the lower left button to switch to your desired app.