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

• 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 .