A networked system of four GranActivity devices, each featuring: An LED matrix to display the daily physical activity. A white confirmation button to indicate task completion. ESP8266 microcontroller connected to a custom Python server. When one grandparent completes the task and presses the button, a signal is sent to the server, which lights up an LED on all four connected devices — creating a sense of accomplishment and shared progress across users 

Idea: Create a collaborative, interactive device for grandparents that encourages them to complete daily physical activities. The device uses light-based feedback and group accountability to foster healthy competition among peers — motivating seniors through non-digital gamification. Constraints: The device must function without an OLED screen. It should work across different Wi-Fi networks in different cities. Must be user-friendly for elderly individuals. Evaluate whether the concept makes best use of its tech capabilities. Should be aesthetically pleasing for home settings. Must differ from app-based solutions to reduce screen time.