ITEM NAME:ESP-07 Mini ESP8266 Serial Module Converter DC 3.3V for Development Description: The power supply voltage of the module is DC 3.3V and the current is above 500mA; The maximum output current of Wi-Fi module IO is 12mA; Wi-Fi module NRST pin is active at low level; EN enable pin is active at high level; The Wi-Fi module enters the upgrade mode: GPIO0 is at low level, and then the module is reset and.The Wi-Fi module enters the upgrade mode: GPIO0 is at low level, and then the module is reset and powered on; the Wi-Fi module enters the normal working mode: GPIO0 is at high level, and the module is reset and powered on.