ITEM NAME:CH340G NodeMcu Wireless WIFI Module Connector Board Replace ESP-12E ESP8266 Tw.WiFi modern ESP8266 + 32MB, compatible with. WiFi modern ESP8266 + 32MB, the module is based on a wide range of exploration. On board there are usb-ttl serial converter ch340g, mini USB socket. DC 4 ~ 9v PowerIn pin VIN.