springboot使用com.ghgande.j2mod的jar编写串口modbus-RTU通讯,包括关闭串口处理,发送请求和处理打印寄存器数据
时间: 2024-05-07 16:21:48 浏览: 5
首先,你需要在pom.xml中引入com.ghgande.j2mod的依赖:
```xml
<dependency>
<groupId>com.ghgande.j2mod</groupId>
<artifactId>j2mod</artifactId>
<version>2.5.1</version>
</dependency>
```
然后,你需要编写一个串口通信的工具类,例如:
```java
import com.ghgande.j2mod.modbus.ModbusException;
import com.ghgande.j2mod.modbus.io.ModbusSerialTransaction;
import com.ghgande.j2mod.modbus.io.ModbusSerialTransport;
import com.ghgande.j2mod.modbus.msg.ReadInputRegistersRequest;
import com.ghgande.j2mod.modbus.msg.ReadInputRegistersResponse;
import com.ghgande.j2mod.modbus.net.SerialConnection;
import com.ghgande.j2mod.modbus.util.SerialParameters;
import java.util.Arrays;
public class ModbusSerialUtils {
private SerialConnection connection;
private ModbusSerialTransport transport;
private ModbusSerialTransaction transaction;
public void open(String portName, int baudRate, int dataBits, int stopBits, int parity) throws Exception {
SerialParameters parameters = new SerialParameters();
parameters.setPortName(portName);
parameters.setBaudRate(baudRate);
parameters.setDataBits(dataBits);
parameters.setStopBits(stopBits);
parameters.setParity(parity);
connection = new SerialConnection(parameters);
connection.open();
transport = connection.getModbusTransport();
transaction = new ModbusSerialTransaction(transport);
transaction.setRetries(0);
}
public void close() throws Exception {
if (connection != null) {
connection.close();
}
}
public int[] readInputRegisters(int slaveAddress, int startAddress, int quantity) throws ModbusException {
ReadInputRegistersRequest request = new ReadInputRegistersRequest(startAddress, quantity);
request.setUnitID(slaveAddress);
transaction.setRequest(request);
transaction.execute();
ReadInputRegistersResponse response = (ReadInputRegistersResponse) transaction.getResponse();
if (response == null) {
throw new ModbusException("Response is null");
}
if (response.getExceptionCode() > 0) {
throw new ModbusException("Exception code: " + response.getExceptionCode());
}
return response.getRegisterValues();
}
public static void main(String[] args) throws Exception {
ModbusSerialUtils utils = new ModbusSerialUtils();
utils.open("COM1", 9600, 8, 1, 0);
int[] data = utils.readInputRegisters(1, 0, 10);
System.out.println(Arrays.toString(data));
utils.close();
}
}
```
在上面的例子中,我们创建了一个ModbusSerialUtils类,提供了打开和关闭串口的方法,以及读取输入寄存器的方法。在main方法中,我们打开串口,读取从站地址为1,起始地址为0,数量为10的输入寄存器的数据,并打印出来。最后,我们关闭串口。
你可以根据需要进行修改和扩展。