This project utilizes a Tessel microcontroller, which is a Node.js-compatible device with built-in Wi-Fi, to create a sleep tracker for dogs. The device is equipped with an accelerometer module and can send SMS messages using Twilio's REST API. The code detects movement by comparing the last x-axis changed position to the current value, and if there's been no movement for more than 5 minutes, it sends out a message about how long the dog slept. The project demonstrates the use of machine learning algorithms in IoT devices and showcases the potential of microcontrollers like Tessel for building innovative projects.