Frequently arduino function
unctions 功能
if(Serial) 如果(串行)
available() 可用()
availableForWrite() 可用于写入()
begin() 开始()
end() 末端()
find() 查找()
findUntil() FUNDUNILL()
flush() 刷新()
parseFloat() PARSEFLAT()
parseInt() PARSETIN()
peek() PEEK()
print() 打印()
println() 打印()
read() 读()
readBytes() 读写()
readBytesUntil() 读字节直到()
readString() 读字符串()
readStringUntil() 读取字符串直到()
setTimeout() 设置TimeTo()
write()写()
serialEvent() 串行事件()