ECO Sensor Box on HVV Buses http://www.inet.haw-hamburg.de/news/2019/eco-sensor-box-on-hvv-buses http://www.inet.haw-hamburg.de/news/2019/eco-sensor-box-on-hvv-buses/@@download/image/Bus_Drive.jpg ECO Sensor Box on HVV Buses Our Energy Autonomous RIOT ECO-Box with Finedust Sensor is Now Circulating through Hamburg.