The Smartwatch had lasted just for 3 days until something magical has happened. Fortunately, the battery realised that it has capacity of 100mAh and I am draining around 200uA so it should last longer. I know that it doesn’t have capacity exact capacity as listed. I got 380 hours (~16 days) of use. That was surprise for me. I knew that LiPo batteries has to be discharged to the 0 and charged over few times, but that didn’t helped me.
- Notifications ✓*
- Custom header ✓
- Cheatsheet ✓
- 2 weeks of use ✓
- Better Android App ☐
* The app has some bugs, I know about them so I have to find time to fix that.
Smartwatch is kind of nice accessory for you and your phone. You can see time, notifications without touching your phone. I wish I could have a smartwatch with long lasting battery and I could show the content I like. The very good one (I don’t mean Apple Watch) are expensive. So I decided to build my own smartwatch 9 month ago. It was a challange for me and my friend, who will build a better one. The research I did took some time.
I would like to have:
- Low power consumption
- Optional: Accurate heart rate sensor.
So I need these things:
- Microcontroller with Bluetooth Low Energy
- Low power display
- LiPo battery with TP4056 charger
- 3D printer case
- Reliable heart rate sensor