SLS (Smart Laundry System) by R.C. Tech Club aims to help hall residents in R.C. Lee Hall track the availability of laundry machines that are situated on the 16th floor using their mobile devices. Until now, residents had to go all the way to the 16th floor for laundry, only to find that the machines are full. We took advantage of a light indicator on the laundry machines that would tell us if the door of a machine is locked (when the machine is in use). Employing light sensors, the system collects information about the status of the doors (and hence, the status of the machines). Then, the system sends that data to our web infrastructure, to be displayed on a user-friendly website on a real-time basis, effectively making our laundry machines an IoT.