I'm Leo from Fab Lab Nanjing.

My final project is about a device to detect environment data of the room, office, stadium, or shopping mall and to alert safeguard or host when something is in emergency.

There is a long corridor in my lab as shown in the picture below.

My device is actually a little car with many sensors and a wifi module and goes repeatly between point A and B where laser detectors are put.

A charging pile is located in point A. The device will go to charge itself while power is below 20%.

The device can upload environment data (such as temperature, humidity, PM2.5, TVOC) hourly to cloud and can alert emergency (such as fire, smoke, noise, earthquake, unexpected break-in) immediately.

If all goes well, more devices should bring big data about different places instantly. Especially for Chinese, it's useful to know the "real" data about air pollution and decoration contamination.

In fact, security alarm is in need for my lab and other places when nobody is on-site. One minute is default to stop the missing alert by entering password. The only possiblity that the device can not alert is when all the device, point A and B are being broken in one minute.

There are two floors. The bottom floor is equiped with chargeable battery, mainboard and wheels.

Sensors, wifi module and password keypad are set up on the top floor.