Thursday was about putting it all together. The separate parts on the table, sensors, a microcontroller, a 12 V water valve, had to become one system that does its work on its own. Teams built their automations in Home Assistant and brought the readings together on a dashboard.
Then the real work started: test, adjust, test again. A sensor reading slightly differently than expected, a valve staying open too long, a threshold set too tightly. Each team documented what it built along the way, with the next day presentation in mind.
Watch the day 4 video (7 minutes), filmed by our Turkish partner İTÜ MTAL.
More about the project on the GREEN project page.