282 results about "Arduino" patented technology

The invention provides an RFID based intelligent refrigerator system in which a super-high frequency reader-writer, super-high frequency RFID tags, an operating panel, a fingerprint identifier, an Arduino development board, a miniature electronic scale, a door magnetic switch and a wireless communication module component are combined with a refrigerator. The fingerprint identifier is arranged on the outer side of the refrigerator, identifies the identity of a user and meanwhile records the time when the user uses the refrigerator, food material weights and other information. The reader-writer is arranged in the refrigerator and reads food material information attached with the RFID tags, then system reads the food material information from a background database and displays the information on the operating panel, and the user can perform interactive operation on a display screen to check the food materials stored in the refrigerator and query cookbook recommendations of the food materials and specific making methods of dishes; the user checks the expiration dates, source tracing information and the like of the food materials, takes out or puts in the food materials, the system automatically updates a food material list, records the information of the food materials taken out by the user, automatically draws a diet curve by judging the situations of edible food materials and gives out reasonable diet suggestions according to the actual health condition of the user.

An NFC cell phone dynamic password entrance guard system comprises a GSM module, a user module and a liquid crystal display, an NFC cell phone, an Arduino module, an NFC read-card module, a matrix keyboard and an alarm receiving center. The GSM module, the Arduino module and the NFC read-card module are connected in order. The GSM module is also connected with the alarm receiving center. The Arduino module is connected with the liquid crystal display. The matrix keyboard is connected with the Arduino module. Information transfer between the NFC cell phone and the Arduino module is realized through the NFC read-card module. The invention has the following beneficial effects: the function of updating a dynamic password during card-swiping of the NFC cell phone can be realized, there exists no recycled password, and security of the entrance guard system is enhanced.