Lewei长连接库，ESP8266专用
库中使用到了aJson库 链接:https://github.com/interactive-matter/aJson 还使用到C++标准库的map，如果编译出现std::map linking error的错误，请尝试将libstdc++添加到platforms.txt中，具体方法如下：
ESP8266 for Arduino IDE (xtensa-lx106-elf-gcc) and std::map linking error
For some reason the standard ESP build does not link against libstdc++. You'll need to edit platforms.txt in $ARDUINO_IDE/hardware/esp8266com/esp8266, and add -lstdc++ to the following line: compiler.c.elf.libs=-lm -lgcc -lhal -lphy -lnet80211 -llwip -lwpa -lmain -lpp -lsmartconfig -lwps -lcrypto -laxtls Arduino IDE only reads this file once at start, so, make sure to restart the IDE before compiling.