The product has the advantages of excellent quality, fast response, antiinterference ability, cost, etc. Applicationspecific digital module acquisition technology and temperature and humidity sensing technology ensure that the product has high reliability and excellent longterm stability. 1 piece AM2302 digital temperature and humidity sensor is a temperature and humidity combination sensor calibrated digital signal output. Each AM2302 sensor is a very accurate humidity calibration chamber for calibration. The calibration coefficients are stored in the OTP memory in the form of a program, and the internal sensor detection signal processing calls these calibration coefficients. The sensor includes a capacitive humidity sensitive element and an NTC temperature measurement device, and is connected to a highperformance 8bit microcontroller.