WIFI module ESP-01 ESP-01S debugging downloader: the old board can only be debugged but not downloaded. The upgraded version adds a download circuit, which can be debugged and downloaded.
This price does not include the ESP8266 WIFI module, only the conversion board! ! !
This module is only a USB-to-serial module, which is only responsible for converting the USB interface into a serial port suitable for the ESP8266 module. For all the knowledge of WiFi, please check the relevant information of ESP8266 module to use! !