TopYoo ESP8266 ESP-12E serial WIFI Industrial stable version A full test board Full IO leads Stability testing of ESP-12E Support 3-way PWM 6-way IO AD and one high-speed UART Reference links: https://github.com/esp8266/Arduino As the smallest low-cost system for learning, can develop AT command or SDK download Full IO interfaceleads, supports AT and internal ESP8266 to direct product development