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文本框输入十六进制，按字节通过蓝牙发送 · App Inventor 2 中文网
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有用户问：我想把文本框里输入的「ABCD」，以十六进制 0xAB 0xCD 这样的两个字节通过蓝牙发送出去，有什么转换方案吗？
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