CH340 USB to ESP8266 ESP-01 ESP-01S Serial Wireless Development Board Wireless ESP8266 Wifi Adapter Module

Features: Perfect Companion for ESP8266: a USB-to-serial module that converts the USB interface to a serial port suitable for ESP8266 Using CH340 Serial Chip: more stable performance, powerful compatibility, support all Windows system The main purpose is to connect ESP8266 and computer PC via serial port Little Tip: you need to solder a pushbutton across the ground and GPIO0 pin. Only need to hold the button for a few second as you plug it into a USB port then you can let go and the ESP is in program mode For more information on this device you can google "All in one ESP-01 to USB converter" The first result is a page on the esp8266 wiki with great information. They have details on getting into programming mode, and links for the CH340 drivers if you need them High speed CPU frequency and can be used as a serial port WIFI Package Included:1*CH340 USB to ESP8266 ESP-01 Adapter