This downloader uses CP2104 USB serial port chip and adds ESP8266 automatic download circuit. It is very convenient for users to download ESP-01/01S program, upgrade firmware, serial debugging and so on. It supports download software such as Arduino IDE, ESP8266 Flasher and Lexin FLASH_DOWNLOAD_TOOLS by one button. It does not need to be downloaded. There is no need to press any buttons. The WiFi module will automatically enter the download mode.