Introduction - If you have any usage issues, please Google them yourself
********************************** DHT21 usage examples SCM: AT89S52 or STC89C52RC function serial port temperature and humidity data baud rate of 9600 hardware connection: P2.0 port as communication port connected DHT11, DHT11 the power and ground connections and power microcontroller, the microcontroller serial plus MAX232 connected computer companies Guangzhou Aosong Electronics