The shield is designed on the basis of esp8266 by Espressif Systems, compatible with the pins for Arduino UNO / Mega2560 DevBorad. The standard pin is compatible with Ard Uno, Mega2560 and other main control cards. The connection between Ard and Uno adopts a voltage conversion chip, which makes 3.3V and 5V compatible. The shield is compatible with the pins for Arduino Uno, Mega2560 and other control boards. The serial port is controlled by a dual channel dial code switch, so the expansion card can be used as a Ard Uno expansion card alone or as an ESP8266 expansion card. WiFi serial port, the Ard program does not require any configuration. Configure WiFi settings and serial port settings according to the web server.
