The open (Smart)Watch is based on the blueIOT core in combination with an sensor shield carrying an Memory TFT Display with 96×96 pixel resolution (2uA hold / 4uA write). There is as of blueIOT ultra-low power design only one single CR2032 coin cell battery needed. The sensor shield carries 3D accelerometer, barometer, UV Index sensor and a secret store.
The 3D printed housing fits nicely to the Sony(™) Smartwatch II wrist band:
Assembly of the blueIOT core and shield – carrying the display:
The sensor shield for blueIOT core module:
Overall dimensions are very close to commercial smart watches 44x44mm and 13mm thickness.