Examples with ModbusIOException net.wimpi.modbus.ModbusIOException used on opensource projects

Example 16 with ModbusIOException

use of net.wimpi.modbus.ModbusIOException in project openhab1-addons by openhab.

the class TCPConnectionHandler method run.

// setConnection
@Override
public void run() {
    try {
        do {
            // 1. read the request
            ModbusRequest request = m_Transport.readRequest();
            logger.trace("Request:{}", request.getHexMessage());
            ModbusResponse response = null;
            // test if Process image exists
            if (ModbusCoupler.getReference().getProcessImage() == null) {
                response = request.createExceptionResponse(Modbus.ILLEGAL_FUNCTION_EXCEPTION);
            } else {
                response = request.createResponse();
            }
            logger.debug("Request:{}", request.getHexMessage());
            logger.debug("Response:{}", response.getHexMessage());
            m_Transport.writeMessage(response);
        } while (true);
    } catch (ModbusIOException ex) {
        if (!ex.isEOF()) {
            // other troubles, output for debug
            ex.printStackTrace();
        }
    } finally {
        try {
            m_Connection.close();
        } catch (Exception ex) {
        // ignore
        }
    }
}

Example 17 with ModbusIOException

use of net.wimpi.modbus.ModbusIOException in project openhab1-addons by openhab.

the class ModbusASCIITransport method readResponse.

// readRequest
@Override
public ModbusResponse readResponse() throws ModbusIOException {
    boolean done = false;
    ModbusResponse response = null;
    int in = -1;
    setReceiveThreshold(1);
    try {
        do {
            // 1. Skip to FRAME_START
            while ((in = m_InputStream.read()) != FRAME_START) {
                if (in == -1) {
                    throw new IOException("readResponse: I/O exception - Serial port timeout.");
                }
            }
            logger.trace("Managed to read at least one byte");
            // 2. Read to FRAME_END
            synchronized (m_InBuffer) {
                m_ByteInOut.reset();
                while ((in = m_InputStream.read()) != FRAME_END) {
                    if (in == -1) {
                        throw new IOException("I/O exception - Serial port timeout.");
                    }
                    m_ByteInOut.writeByte(in);
                }
                int len = m_ByteInOut.size();
                logger.debug("Received: {}", ModbusUtil.toHex(m_InBuffer, 0, len));
                // check LRC
                if ((m_InBuffer[len - 1] & 0xff) != ModbusUtil.calculateLRC(m_InBuffer, 0, len - 1)) {
                    logger.debug("LRC is wrong: received={} calculated={}", (m_InBuffer[len - 1] & 0xff), ModbusUtil.calculateLRC(m_InBuffer, 0, len - 1));
                    continue;
                }
                m_ByteIn.reset(m_InBuffer, m_ByteInOut.size());
                in = m_ByteIn.readUnsignedByte();
                // JDC: To check slave unit identifier in a response we need to know
                // the slave id in the request. This is not tracked since slaves
                // only respond when a master request is made and there is only one
                // master. We are the only master, so we can assume that this
                // response message is from the slave responding to the last request.
                // if (in != ModbusCoupler.getReference().getUnitID()) {
                // continue;
                // }
                in = m_ByteIn.readUnsignedByte();
                // create request
                response = ModbusResponse.createModbusResponse(in);
                response.setHeadless();
                // read message
                m_ByteIn.reset(m_InBuffer, m_ByteInOut.size());
                response.readFrom(m_ByteIn);
            }
            done = true;
        } while (!done);
        return response;
    } catch (Exception ex) {
        final String errMsg = String.format("I/O exception - failed to read: %s", ex.getMessage());
        logger.debug("{}", errMsg);
        throw new ModbusIOException("readResponse " + errMsg);
    } finally {
        m_CommPort.disableReceiveThreshold();
    }
}

Example 18 with ModbusIOException

use of net.wimpi.modbus.ModbusIOException in project openhab1-addons by openhab.

the class ModbusASCIITransport method readRequest.

// writeMessage
@Override
public ModbusRequest readRequest() throws ModbusIOException {
    boolean done = false;
    ModbusRequest request = null;
    int in = -1;
    try {
        do {
            // 1. Skip to FRAME_START
            while ((in = m_InputStream.read()) != FRAME_START) {
                ;
            }
            // 2. Read to FRAME_END
            synchronized (m_InBuffer) {
                m_ByteInOut.reset();
                while ((in = m_InputStream.read()) != FRAME_END) {
                    if (in == -1) {
                        throw new IOException("readRequest: I/O exception - Serial port timeout.");
                    }
                    m_ByteInOut.writeByte(in);
                }
                // check LRC
                if ((m_InBuffer[m_ByteInOut.size() - 1] & 0xff) != ModbusUtil.calculateLRC(m_InBuffer, 0, m_ByteInOut.size() - 1)) {
                    continue;
                }
                ;
                m_ByteIn.reset(m_InBuffer, m_ByteInOut.size());
                in = m_ByteIn.readUnsignedByte();
                // check message with this slave unit identifier
                if (in != ModbusCoupler.getReference().getUnitID()) {
                    continue;
                }
                in = m_ByteIn.readUnsignedByte();
                // create request
                request = ModbusRequest.createModbusRequest(in);
                request.setHeadless();
                // read message
                m_ByteIn.reset(m_InBuffer, m_ByteInOut.size());
                request.readFrom(m_ByteIn);
            }
            done = true;
        } while (!done);
        return request;
    } catch (Exception ex) {
        final String errMsg = "I/O exception - failed to read";
        logger.debug("{}: {}", errMsg, ex.getMessage());
        throw new ModbusIOException("readRequest: " + errMsg);
    }
}

Example 19 with ModbusIOException

use of net.wimpi.modbus.ModbusIOException in project openhab1-addons by openhab.

the class ModbusBINTransport method readResponse.

// readRequest
@Override
public ModbusResponse readResponse() throws ModbusIOException {
    boolean done = false;
    ModbusResponse response = null;
    int in = -1;
    setReceiveThreshold(1);
    try {
        do {
            // 1. Skip to FRAME_START
            while ((in = m_InputStream.read()) != FRAME_START) {
            // FIXME: handle EOF, similar to ASCIITransport
            }
            // 2. Read to FRAME_END
            synchronized (m_InBuffer) {
                m_ByteInOut.reset();
                while ((in = m_InputStream.read()) != FRAME_END) {
                    m_ByteInOut.writeByte(in);
                }
                // check CRC
                int[] crc = ModbusUtil.calculateCRC(m_InBuffer, 0, m_ByteInOut.size() - 2);
                if (!(// low byte first
                m_InBuffer[m_ByteInOut.size() - 2] == crc[0] && // hibyte
                m_InBuffer[m_ByteInOut.size() - 1] == crc[1])) {
                    continue;
                }
                m_ByteIn.reset(m_InBuffer, m_ByteInOut.size());
                in = m_ByteIn.readUnsignedByte();
                // check unit identifier
                if (in != ModbusCoupler.getReference().getUnitID()) {
                    continue;
                }
                m_ByteIn.reset(m_InBuffer, m_ByteInOut.size());
                in = m_ByteIn.readUnsignedByte();
                // check unit identifier
                if (in != ModbusCoupler.getReference().getUnitID()) {
                    continue;
                }
                in = m_ByteIn.readUnsignedByte();
                // create request
                response = ModbusResponse.createModbusResponse(in);
                response.setHeadless();
                // read message
                m_ByteIn.reset(m_InBuffer, m_ByteInOut.size());
                response.readFrom(m_ByteIn);
            }
            done = true;
        } while (!done);
        return response;
    } catch (Exception ex) {
        final String errMsg = "failed to read";
        logger.debug("{}: {}", errMsg, ex.getMessage());
        throw new ModbusIOException("I/O exception - " + errMsg);
    } finally {
        m_CommPort.disableReceiveThreshold();
    }
}