总结：Serial.write不能发送String,可以发送单个字节的数据、字符数组，可以与Serial.read()函数联用。 今天在测试程序时，发现用Sreial.write()发送String类时，显示报错"no matching function for call to HardwareSerial::write(String&)"，就研究了一下，Serial.write(),记录如下。

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AI for prototyping takes center stage in Elektor Lab Talk #51 on October 29. Join the live discussion and enter our e-book giveaway.