modbus协议下串口连接的数据获取

前段时间公司要求与物联对接，将物理设备传感器获取的信息抓取出来发送到mq，以便其他需要的人订阅处理。为了加强印象，这里记录下数据的抓取。

特殊jar包准备(上传图片无响应，这里直接贴名字了，直接度娘即可) jamod.jar  modbus4j.jar

一、串口连接下: 

public class Serial {

    /**
     * 建立串口连接
     * @param portChoice
     * @param stopbitChoice
     * @param parityChoice
     * @param beginbitChoice
     * @param baudChoice
     * @return
     * @throws ModbusInitException
     */
    public static ModbusMaster creatConnetion(String portChoice, String stopbitChoice, String parityChoice,
            String beginbitChoice, String baudChoice) throws ModbusInitException {
        SerialParameters serialParameters = new SerialParameters();
        serialParameters.setCommPortId(portChoice);// 设置串口号
        serialParameters.setStopBits(Integer.parseInt(stopbitChoice)); // 设置停止位
        serialParameters.setParity(0); // 设置奇偶校验为无
        serialParameters.setDataBits(Integer.parseInt(beginbitChoice)); // 设置数据位
        serialParameters.setBaudRate(Integer.parseInt(baudChoice)); // 设置串口波特率
        serialParameters.setPortOwnerName("one");
        ModbusFactory modbusFactory = new ModbusFactory();
        ModbusMaster modbusMaster = modbusFactory.createRtuMaster(serialParameters);
        modbusMaster.init();
        return modbusMaster;
    }

    /**
     * 中断连接
     * @param modbusMaster
     */
    public static void interruptConnection(ModbusMaster modbusMaster) {
        if (modbusMaster != null) {
            modbusMaster.destroy();
        }
    }

    /**
     * 01 Read Coil(0x)
     * @param modbusMaster
     * @param responseText
     * @param sweepSpacingText
     * @param equipmentIDText
     * @param addressText
     * @param amountText
     * @return
     */
    public static String readCoil(ModbusMaster modbusMaster, String responseText, String sweepSpacingText,
            String equipmentIDText, String addressText, String amountText) {
        try {
            synchronized (addressText) {
                ReadCoilsRequest readCoilsRequest = new ReadCoilsRequest(Integer.parseInt(equipmentIDText),
                        Integer.parseInt(addressText), Integer.parseInt(amountText));
                ReadCoilsResponse readCoilsResponse = (ReadCoilsResponse) modbusMaster.send(readCoilsRequest);
                String result = readCoilsResponse.getBooleanData().toString();
                return result;
            }
        } catch (NumberFormatException e) {
            e.printStackTrace();
        } catch (ModbusTransportException e) {
            e.printStackTrace();
        }
        return null;
    }

    /**
     *  02 Read Discrete Inputs(1x)
     * @param modbusMaster
     * @param responseText
     * @param sweepSpacingText
     * @param equipmentIDText
     * @param addressText
     * @param amountText
     * @return
     * @throws NumberFormatException
     * @throws ModbusTransportException
     */
    public static String readDiscreteInput(ModbusMaster modbusMaster, String responseText, String sweepSpacingText,
            String equipmentIDText, String addressText, String amountText)
            throws NumberFormatException, ModbusTransportException {
        synchronized (addressText){
            ReadDiscreteInputsRequest request = new ReadDiscreteInputsRequest(Integer.parseInt(equipmentIDText),
                    Integer.parseInt(addressText), Integer.parseInt(amountText));
            ReadDiscreteInputsResponse response = (ReadDiscreteInputsResponse) modbusMaster.send(request);
            short[] dataShort = null;
            if (!response.isException()) {
                dataShort = response.getShortData();
                for (short s : dataShort) {
                    System.out.println("收到数据：" + s);
                }
            }
            StringBuffer result = new StringBuffer();
            for (int i = 0; i < dataShort.length; i++) {
                result.append(dataShort[i]);
            }
            String newStr = result.toString();
            return newStr;
        }
    }
    /**
     *  03 Read Holding Registers(4x)
     * @param modbusMaster
     * @param responseText
     * @param sweepSpacingText
     * @param equipmentIDText
     * @param addressText
     * @param amountText
     * @return
     * @throws NumberFormatException
     * @throws ModbusTransportException
     * @throws ModbusInitException
     */
    public static String ReadHoldingRegistersRequest(ModbusMaster modbusMaster, String responseText,
            String sweepSpacingText, String equipmentIDText, String addressText, String amountText)
            throws NumberFormatException, ModbusTransportException, ModbusInitException {
        synchronized (addressText){
            ReadHoldingRegistersRequest holdingRegistersRequest = new ReadHoldingRegistersRequest(
                    Integer.parseInt(equipmentIDText), Integer.parseInt(addressText), Integer.parseInt(amountText));
            ReadHoldingRegistersResponse holdingRegistersResponse = (ReadHoldingRegistersResponse) modbusMaster
                    .send(holdingRegistersRequest);
            short[] dataShort = null;
            if (!holdingRegistersResponse.isException()) {
                dataShort = holdingRegistersResponse.getShortData();
                for (short s : dataShort) {
                    System.out.println("收到数据：" + s);
                }
            }
            // modbusMaster.destroy();
            StringBuffer result = new StringBuffer();
            for (int i = 0; i < dataShort.length; i++) {
                result.append(dataShort[i]);
            }
            String newStr = result.toString();
            return newStr;
        }
    }

    /**
     *  04 Read Input Registers(3x)
     * @param modbusMaster
     * @param responseText
     * @param sweepSpacingText
     * @param equipmentIDText
     * @param addressText
     * @param amountText
     * @return
     * @throws NumberFormatException
     * @throws ModbusTransportException
     */
    public static String readInputRegisters(ModbusMaster modbusMaster, String responseText, String sweepSpacingText,
            String equipmentIDText, String addressText, String amountText)
            throws NumberFormatException, ModbusTransportException {
        synchronized (addressText){
            ReadInputRegistersRequest readInputRegistersRequest = new ReadInputRegistersRequest(
                    Integer.parseInt(equipmentIDText), Integer.parseInt(addressText), Integer.parseInt(amountText));
            ReadInputRegistersResponse readInputRegistersResponse = (ReadInputRegistersResponse) modbusMaster
                    .send(readInputRegistersRequest);
            short[] dataShort = null;
            if (!readInputRegistersResponse.isException()) {
                dataShort = readInputRegistersResponse.getShortData();
                for (short s : dataShort) {
                    System.out.println("收到数据：" + s);
                }
            }
            // modbusMaster.destroy();
            StringBuffer result = new StringBuffer();
            for (int i = 0; i < dataShort.length; i++) {
                result.append(dataShort[i]);
            }
            String newStr = result.toString();
            return newStr;
        }

    }

测试一下:注意串口连接上后再测试，或下载modbus Slave模拟串口连接测试。

    @Test
    public void testConnection(){
        String ip = "localhost";
        int port = 502;
        TCPMasterConnection tcp = ModbusTcp.connectionTCP(ip, String.valueOf(port),"2000");
        System.out.println("连接是否存在:"+tcp.isConnected());
        //ModbusTcp.closeConnectionTcp(tcp);
        System.out.println("连接是否存在:"+tcp.isConnected());
        String address = "0";
        String slaveId = "1";
        String amountTextResult = "10";
        ModbusTcp.readCoilStatusTCP(address, slaveId, tcp, amountTextResult);
    }