ljgnet 发表于 2019-5-27 16:43:38

SoftwareSerial软串口通信

#include <SoftwareSerial.h>
//实例化软串口
SoftwareSerial mySerial(2, 3); // RX, TX

void setup()
{
Serial.begin(115200);
while (!Serial) {
}

Serial.println("Goodnight moon!");

mySerial.begin(9600);
mySerial.println("Hello, world?");
}

void loop()
{
if (mySerial.available())
    Serial.write(mySerial.read());
if (Serial.available())
    mySerial.write(Serial.read());
}

ljgnet 发表于 2019-5-27 16:45:54

怎么不行呢

com4 应该打印出"Hello, world?
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