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请问下我在使用串口时,不知为何返回值只能是110个字符,多了就无法返回出来,请问下这个主要是什么原因呢?我改写的官方的透传工程。我就是向串口发送一个命令,串口就回传大概五百多个字符我,可惜就返回了110个。请问下有什么方法优化下嘛?