This armband continuously monitors body temperature while you sleep. You can monitor temperature hands-free from another device, even if you’re in a different room.
You can monitor temperature for up to 8 hours on a full charge (tested on a 3.3V 400mAh lipoly battery, data sent to Adafruit IO once every minute). Data is sent to your Adafruit IO account for long-term storage and visualization. Use Adafruit IO Triggers to be notified by email when the temperature increases past a set threshold.
The project uses Adafruit Feather nRF52840 Express, Adafruit Feather nRF52840 Sense, and MCP9808 High Accuracy I2C Temperature Sensor Breakout Board.