我遇到以下问题:当我想刷新 OutputStream 时,RxTx 返回错误。 目标是使用调制解调器 key 发送短信。那么我哪里错了?
我查了一下,没有发现什么问题,不知道是什么原因造成的!
我认为错误消息来自 RxTx 库,但我不确定。 我已经尝试过不冲水,但也没有效果。 所以请帮助我<3!
这是我的类(class)的实际代码:
package fr.ryfax.smscontroller.main;
import java.io.*;
import java.util.ArrayList;
import gnu.io.*;
public class USBModem {
private CommPortIdentifier PORT_ID;
private final String PORT;
private final int BITRATE;
private final String CENTER;
private final char ENTER = 13;
private final char CTRLZ = 26;
public USBModem(String PORT, int BITRATE, String SMSCENTER) {
try {
this.PORT_ID = CommPortIdentifier.getPortIdentifier(PORT);
}catch(Exception e) {
this.PORT_ID = null;
System.err.println("USBModem Error: Unknown port!");
}
this.PORT = PORT;
this.BITRATE = BITRATE;
this.CENTER = SMSCENTER;
}
public void sendSMS(String TO, String MSG) throws Exception {
SerialPort serial = (SerialPort) PORT_ID.open(this.PORT, 2000);
//InputStream inputStream = serial.getInputStream();
serial.setSerialPortParams(this.BITRATE, //115200
SerialPort.DATABITS_8, //Bit de données
SerialPort.STOPBITS_1, //Bit d'arrêt
SerialPort.PARITY_NONE //Parité
);
serial.setFlowControlMode(SerialPort.FLOWCONTROL_NONE); //Flux
ArrayList<String> commands = new ArrayList<String>();
commands.add("AT" + ENTER);
commands.add("AT+CMGF=1" + ENTER);
commands.add("AT+CSCA=\"" + CENTER + "\"" + ENTER);
commands.add("AT+CSCA=\"" + TO + "\"" + ENTER);
commands.add(MSG + CTRLZ);
sendCommands(commands, serial);
System.out.println("[MOI] -> [" + TO + "]" + " : " + MSG);
}
public void sendCommands(ArrayList<String> commands, SerialPort serial) throws Exception {
OutputStream outputStream = serial.getOutputStream();
for(String command : commands) {
outputStream.flush();
outputStream.write(command.getBytes());
Thread.sleep(100);
}
Thread.sleep(3000);
serial.close();
outputStream.close();
}
}
输出:
Exception in thread "main" java.io.IOException: No error in nativeDrain
at gnu.io.RXTXPort.nativeDrain(Native Method)
at gnu.io.RXTXPort$SerialOutputStream.flush(RXTXPort.java:1248)
at fr.ryfax.smscontroller.main.USBModem.sendCommands(USBModem.java:61)
at fr.ryfax.smscontroller.main.USBModem.sendSMS(USBModem.java:53)
at fr.ryfax.smscontroller.main.Main.main(Main.java:21)
最佳答案
在 outputStream.write
之后调用 outputStream.flush
更有意义,所以就这样做。说到切换顺序,请在 serial.close
之前调用 outputStream.close
。
然后找一张大A3纸,一支红笔写1000遍
I will never use
Thread.sleep
as a substitute for reading and parsing responses from a modem.I will never use
Thread.sleep
as a substitute for reading and parsing responses from a modem.I will never use
Thread.sleep
as a substitute for reading and parsing responses from a modem.I will never use
Thread.sleep
as a substitute for reading and parsing responses from a modem....
向调制解调器发送 AT 命令时,您必须 read and parse它发送回给您的所有内容。
您的第二个 AT+CSCA
应该是 AT+CMGS
,对于该命令,您
必须 wait for the "ready to receive payload data" prompt在发送短信有效负载之前。
关于java - 错误 : "No error in nativeDrain" caused by OutputStream. 刷新(),我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/56367113/