https://arduino.esp8266.com/stable/package_esp8266com_index.json https://raw.githubusercontent.com/DFRobot/FireBeetle-ESP8266/master/package_firebeetle8266_index.json 下载在arduino下开发esp8266-3.1.2版本，下载时需要关闭防火墙 路径：C:\Users\lan\AppData\Local\Arduino15