温湿度信息采集选用数字温湿度传感器DHT11，内部集成了专用的温湿度传

The digital temperature and humidity sensor DHT11 is used for temperature and humidity information collection, which integrates a dedicated temperature and humidity sensor technology and digital module acquisition technology, which can accurately measure temperature and humidity data, small size and low power consumption. The single-wire serial communication has an effective transmission distance of more than 20 meters, and is effectively used in many fields such as home appliances, weather stations, dehumidifiers and automatic control. The package is a 4-pin single-row pin package. No. 1 pin power input, No. 2 is serial data input and output, No. 3 NC pin is not used, No. 4 ground, Table 3-3 describes the pin function.

Temperature and humidity information collection selected digital temperature and humidity sensor DHT11, internal integration of special temperature and humidity sensing technology and digital module acquisition technology, can accurately measure temperature and humidity data, small volume and low power consumption, data transmission mode using a single bus mode, that is, single-line serial communication, effective transmission distance of more than 20 meters, effectively applied to home appliances, weather stations, dehumidifiers and automatic control and many other fields. The package is in a 4-pin single-row pin package. Pin No. 1 power input, 2 is serial data input output, NC pin No. 3 is not used, No. 4 ground, Table 3-3 describes the pin function.

DHT11 digital temperature and humidity sensor is selected for temperature and humidity information collection, and special temperature and humidity sensor technology and digital module collection technology are integrated inside, which can accurately measure temperature and humidity data, with small volume and low power consumption. The data transmission mode adopts single bus mode, i.e. single line serial communication, with an effective transmission distance of more than 20 meters, which is effectively applied to household appliances, meteorological stations, dehumidifiers and self Dynamic control and many other fields. The package form is 4-pin single row pin package. Pin 1 is the power input, pin 2 is the serial data input and output, pin 3 is not used, pin 4 is ground, table 3-3 describes the pin function.