This is my “Gateway” smartwatch project! It acts as a compact wireless access key to control all your IoT devices from the comfort of your arm! It also features exchangeable MAC addresses, the ability to scan WiFi networks, has a built-in LiDAR for distance sensing, and provides you with real-time temperature, altitude, humidity, pressure, gas resistance, tilt, and acceleration data.

The watch utilizes ESP-NOW on an ESP32-S3-MINI MCU to quickly broadcast data with ultra-low power consumption. This wireless protocol was chosen over others because of its ability to bypass the traditional WiFi connection setup, which makes the action-reaction time between other devices nearly instantaneous. To communicate within the watch's sensors, the MCU utilizes I2C for multi-addressable communication.

The display being used for this project is a 280x240 resolution 1.69” 262K RGB LCD driven by an ST7789 via Serial Peripheral Interface. Perfect for illuminating high-resolution images. To power it all, I’m using a rechargeable 400mAh Lithium-ion Polymer (LiPo) battery which I’ve slid under the watch band casing. Harnessing its power, the watch can last 14 hours (standard use) with a full charge time of <43 minutes. 

If you'd like to know more, this project was documented in detail, completely free and open-source on my website here. Just click "DISMISS" if you get a pop-up!

Thanks for reading!