Here at y2group12016.blogspot.com you'll find the blog for our year2 project blog titled "A humidity monitoring system, by Pin Wang, Chuxuan Yu, Jingyang Zhou, Jingyuan Gao and Zhuoyue Chen supervised by Dr Jeyan Thiyagalinggam.
The project using a raspberry Pi 2b board as CPU and a DHT 22 as a sensor to measure the humidity in the air in high speed and send dynamic data to a database. In this way, this equipment can be placed anywhere and the humidity on that place can be monitored in real time.
We designed the circuit using a DHT22 sensor and a 10K resistor. Then the raspberry pi 2b board can be connected to the screen and we have to install the system to program on it. After making the circuit implement the function, we need to send the measurement value to the database dynamically. So the program is added some content to make sure connecting to the database.