Name: dht11 Info: Overlay for the DHT11/DHT21/DHT22 humidity/temperature sensors Also sometimes found with the part number(s) AM230x. Load: dtoverlay=dht11,<param>=<val> Params: gpiopin GPIO connected to the sensor's DATA output. (default 4) 意思是,在config.txt中添加上dtoverlay=dht11 就可以在/dev/下找到dht11文件,内容就是dht传感器的温度啦。