The download function of the serial port is controlled by the toggle switch, and the codes of the two MCU can be burned separately by using a USB interface so that two development boards can be used alone or combined. It is very convenient when using.
Esp8266+Arduino UNO is suitable for the development of the Internet of Things, networking functions, and independent wireless network construction.
1. MCU:ATMEGA328 and esp8266
2. Function:Arduino unoR3 and ESP8266development board