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关于GATT_ReadCharValue()函数发送数据问题



各位大神:

       你们好!

我用Central通过GATT_ReadCharValue()函数向Peripheral发送数据,发送单个字节的时候没有问题,如果发送多个字节就提示Write Error 13请问是什么问题,还有Peripheral怎么向Central发送数据?