The Internet of Things (IoT) is another revolution in the information industry following computers, the Internet and mobile communications.RFID technology, as one of the important cores of the perceptual layer of the IoT, has promoted the rapid development of the IoT while at the same time promoting the development of the application of RFID technology.

Everyone in a campus scenario needs drinking water every day. The traditional way to get water is to swipe a card at the water supply area to receive water. We hope that each classroom can have a small water dispenser where students can purchase drinking water by swiping their cards, which will greatly facilitate their lives.


With the help of this semester's RFID practice course, we implemented a small water dispenser through RFID. Students can buy an RFID water card at the management office and recharge it with a certain amount of money, and then they can use this card to swipe for water. At the same time, the machine can be controlled by voice to select their preferred water temperature.


First we designed a water dispenser form factor with two buckets, a cold water bucket and a hot water bucket. An offline voice recognition module is embedded for recognizing user commands. An RFID reader is also used for reading and writing RFID cards. We use an STM32 microcontroller as the master to control the voice module, RFID module and the buckets.


Offline Voice Recognition, RFID, Water Dispenser


The video was filmed in 2019, in the Student Innovation Lab at Zhengzhou University. Unfortunately, the original video was not preserved.


Video 1. Prototype of the water dispenser we designed.