ARDIUNO 发开板管理网址是
https://dl.espressif.com/dl/package_esp32_index.json,
http://arduino.esp8266.com/stable/package_esp8266com_index.json,
https://git.oschina.net/dfrobot/FireBeetle-ESP32/raw/master/package_esp32_index.json
https://git.oschina.net/dfrobot/FireBeetle-ESP32/raw/master/package_esp32_index.json 是2018-8-10添加的,发现了很多问题,不能#include <uart.h>
不能#include <softwareseial.h> 不知道是不是少了东西。2018-8-14重新添加
https://dl.espressif.com/dl/package_esp32_index.json,
开始测试下。