Hack together your own e-paper smartwatch with this $50 open-source kit

 theverge.com  01/14/2021 01:43:16   Mitchell Clark
Image of the Watchy Image: SQFMI

If youve ever wanted to be like Steve Wozniak and have your own custom-made, geeky watch, Squarofumi (stylized SQFMI) may have the product for you: an open-source, Arduino-powered smartwatch with a 1.54-inch e-paper screen (via Gizmodo). Its called the Watchy, and both the hardware and software are completely customizable. You can, however, use it right out of the box, as the PCB acts as the body and has points to attach a watch strap. And to top it all off, its only $50, on sale for $45 at time of writing.

The SQFMI site has sections for watch faces and cases, but at the moment they both only say Coming Soon, so if you're thinking about this watch, youll definitely want to make sure youre ready for a DIY project. Oh, and theres also the fact that the watch doesnt come assembled  you have to put it together yourself, hooking the 200x200 display, PCB, and 200mAh battery together. Theres Wi-Fi, Bluetooth, a 3-axis accelerometer and four buttons that can be used for navigation, or whatever other functions you can dream up.

The Watchy has hardware that DIYers may be familiar with.
Graphic: SQFMI

If having to put together the hardware yourself doesnt intimidate you, theres one last thing to note: while the watch does come with pre-loaded software, if you want to make any changes to the watch face youll have to download the Arduino IDE and program them yourself.

While some people may be turned off by all the work required to get the watch working, to certain people the build-it-yourself approach means that theyll be able to get exactly what they want. If you want a watch with a case that looks like an iPod or Game Boy, with an interface to match, you can 3D print a case and code the watch face yourself. Its the type of freedom youre not likely to get from most commercial smartwatches, though Tizen and Wear OS watches do offer downloadable watch faces.

The battery life SQFMI estimates depends on your use case  it says if youre just keeping time you should get five to seven days, but if youre fetching data frequently you may only see two to three. Its open-source nature, however, means that you could always fit a larger battery into it, or try and make some software optimizations if there are features youre willing to cut.

The watch uses a ESP32 SOC, which can be programmed with Arduino and MicroPython.
Image: SQFMI

If youre looking for this kind of coding/DIY project, the Watchy is being sold on Tindie. Id just recommend you look at SQFMIs website to make sure that the amount of documentation available is enough for you to get started.

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