This is an open-source programmable watch that supports development in C or Python, allowing for the addition of new features at any time.

It is primarily used for environmental monitoring, alerting users to open windows for ventilation or go outside for fresh air when air quality is poor, to prevent discomfort.

For environmental monitoring, it uses two Sensirion sensors, the SGP40 and the SHT30. It also features a ws2812 led and a buzzer for audio-visual alarm alerts.

It comes with a motion sensor that helps people track their steps. For those with knee issues, it can help control daily step counts to achieve a rest and recuperation goal.

It has a USB Type-C interface, supporting lithium battery charging and file transfer.

Specification

NRF52840

SGP40

SHT30

LSM6DS3TR-C

Display: LPM009M360A (0.85inch 72*144 )

Battery: 402030

watch band: 20mm

Hardware

PCB thickness: 0.8mm

3D Printings

Fresh Watch( Part 3D Printing) - Share Project - PCBWay

Software

PlatformIO

Before burning, you need to use a programming tool like JLink to install the bootloader (see the file: freshwatch_nrf52840_bootloader-0.9.2_s140_6.1.1.hex). Then, you can compile this code and proceed with the download.

For future firmware updates, you can connect the device via USB, then enter UF2 mode through the menu, and drag the flash.uf2 file into the USB drive.

A flash.uf2 file will be automatically generated each time you compile, making it convenient for updates.

The pages directory contains content related to the various app functionalities. You can write these according to the rules in the template folder and sequentially fill in these functions.

CircuitPython

First, you need to burn the bootloader, then drag the firmware_9.1.1_0826.uf2 file into the generated USB drive.

This firmware uses external flash as the code storage system, so if you want to use this Python framework, you must solder the flash chip.

For further development, you can refer to the CircuitPython official website.