Fig. 25From: Building an indoor air quality monitoring system based on the architecture of the Internet of ThingsPL2303 USB to TTL. The PL2303 USB to TTL in this study is a data converter, which converts the single chip USB into UART. Through PL2303, ESP8266 can communicate with the PC, thus, the PC can use ESP8266 to install the local area network of the wireless Wi-Fi base stationBack to article page