springboot如何使用modbus4j进行udp通讯

以下是使用modbus4j进行UDP通信的Spring Boot示例代码： 1. 首先，需要在pom.xml文件中添加modbus4j依赖： ```xml <dependency> <groupId>com.ghgande.j2mod</groupId> <artifactId>modbus4j</artifactId> <version>3.1.4</version> </dependency> ``` 2. 在application.properties文件中配置Modbus连接参数： ```properties modbus.ip=192.168.1.1 modbus.port=502 modbus.unit=1 ``` 3. 创建Modbus配置类： ```java @Configuration public class ModbusConfig { @Value("${modbus.ip}") private String ip; @Value("${modbus.port}") private int port; @Value("${modbus.unit}") private int unit; @Bean public ModbusFactory modbusFactory() { return new ModbusFactory(); } @Bean public IpParameters ipParameters() { IpParameters ipParameters = new IpParameters(); ipParameters.setHost(ip); ipParameters.setPort(port); return ipParameters; } @Bean public ModbusMaster modbusMaster(IpParameters ipParameters) throws Exception { ModbusMasterConfig modbusMasterConfig = new ModbusMasterConfig.Builder(ipParameters) .setTransportType(ModbusMasterConfig.Transport.UDP) .build(); ModbusMaster modbusMaster = modbusFactory().createMaster(modbusMasterConfig); modbusMaster.init(); return modbusMaster; } @Bean public ModbusSlaveSet modbusSlaveSet() { return new ModbusSlaveSet(); } @Bean public ModbusSlave modbusSlave(ModbusSlaveSet modbusSlaveSet) { ModbusSlave modbusSlave = new ModbusSlave(modbusSlaveSet); modbusSlave.setUnit(unit); return modbusSlave; } } ``` 4. 创建ModbusService类，定义读写操作方法： ```java @Service public class ModbusService { @Autowired private ModbusMaster modbusMaster; public boolean writeCoil(int address, boolean value) throws Exception { WriteCoilRequest request = new WriteCoilRequest(address, value); WriteCoilResponse response = (WriteCoilResponse) modbusMaster.send(request); return response.isException(); } public boolean writeRegister(int address, int value) throws Exception { WriteRegisterRequest request = new WriteRegisterRequest(address, value); WriteRegisterResponse response = (WriteRegisterResponse) modbusMaster.send(request); return response.isException(); } public boolean[] readCoils(int address, int quantity) throws Exception { ReadCoilsRequest request = new ReadCoilsRequest(address, quantity); ReadCoilsResponse response = (ReadCoilsResponse) modbusMaster.send(request); return response.getBooleanData(); } public int[] readInputRegisters(int address, int quantity) throws Exception { ReadInputRegistersRequest request = new ReadInputRegistersRequest(address, quantity); ReadInputRegistersResponse response = (ReadInputRegistersResponse) modbusMaster.send(request); return response.getShortData(); } } ``` 5. 在Controller中使用ModbusService进行读写操作： ```java @RestController public class ModbusController { @Autowired private ModbusService modbusService; @PostMapping("/writeCoil") public boolean writeCoil(@RequestParam int address, @RequestParam boolean value) throws Exception { return modbusService.writeCoil(address, value); } @PostMapping("/writeRegister") public boolean writeRegister(@RequestParam int address, @RequestParam int value) throws Exception { return modbusService.writeRegister(address, value); } @GetMapping("/readCoils") public boolean[] readCoils(@RequestParam int address, @RequestParam int quantity) throws Exception { return modbusService.readCoils(address, quantity); } @GetMapping("/readInputRegisters") public int[] readInputRegisters(@RequestParam int address, @RequestParam int quantity) throws Exception { return modbusService.readInputRegisters(address, quantity); } } ``` 这样就可以使用Modbus4j进行UDP通信了。注意：在使用UDP通信时，需要在Modbus配置类中将TransportType设置为UDP。