国产欧美精品一区二区,中文字幕专区在线亚洲,国产精品美女网站在线观看,艾秋果冻传媒2021精品,在线免费一区二区,久久久久久青草大香综合精品,日韩美aaa特级毛片,欧美成人精品午夜免费影视

Aiming at the problems of low management efficiency and poor visitor experience, a playground smart bracelet system based on STM32F103C8T6 was designed. STM32F103C8T6 is used as the main control chip, and MAX30102 heart rate sensor is used to collect tourists' heart rate data, the sampling frequency is 4 times per second, and the alarm threshold is set. The ESP8266WiFi module is used as the transmission medium for the communication between the smart bracelet and the server. The working mode is adjusted to Station mode, and the positioning algorithm based on fingerprint matching is used to realize WiFi positioning. The XZ-T1010C metal-resistant RFID tag, which can be repeatedly erased and programmed, stores tourist information and realizes WiFi positioning, automatic billing, heart rate detection and other functions. The test shows that the heart rate detection error of the designed playground smart bracelet system is no more than 3 times/minute, and can record and save tourist information well, which can meet the needs of tourists, improve the management efficiency of the playground, and greatly save the labor cost of the playground.