Meet Watchy: an open source E-ink watch with WiFi and Bluetooth that can be customized with 3D printed cases. It has a 1.54″ e-paper display with 200 x 200p resolution. It has a 3-axis accelerometer with gesture detection. You also get a ton of examples and watch faces to play around with.
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This smartwatch has open source hardware and software. It has a USB-to-Serial adapter for programming. It has 4 tactile buttons.
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