int main(int argc, char *argv[])
{
uint16_t regs[1];
float heaterTemp;
float heaterSetPoint;
char * heaterEnableState;
char * heaterElementState;
char * modbusClientIP = DEFAULT_CLIENT_IP;
int modbusPort = DEFAULT_PORT;
int packet_counter = 0;
uint8_t *tab_bits;
uint16_t *tab_input_value_registers;
tab_bits = (uint8_t *)malloc(NO_BITS * sizeof(uint8_t));
memset(tab_bits, 0, NO_BITS * sizeof(uint8_t));
tab_input_value_registers = (uint16_t *)malloc(NO_REGS* sizeof(uint16_t));
memset(tab_input_value_registers, 0, NO_REGS * sizeof(uint16_t));
bool sts;
int rc;
uint8_t coils[2];
ctx = modbus_new_tcp(modbusClientIP, modbusPort);
if (ctx == NULL) {
fprintf(stderr, "Unable to allocate libmodbus context\n");
return -1;
}
if (modbus_connect(ctx) == -1) {
sts = false;
}
rc = modbus_read_input_registers(ctx,0,1, regs);
packet_counter++;
printf("Packet No: %d, Value of current:%d\n",packet_counter, regs[0]);
modbus_close(ctx);
ctx = modbus_new_tcp(modbusClientIP, modbusPort);
if (ctx == NULL) {
fprintf(stderr, "Unable to allocate libmodbus context\n");
return -1;
}
if (modbus_connect(ctx) == -1) {
sts = false;
}
modbus_close(ctx);
modbus_free(ctx);
return 0;
}
int main()
{
modbus_t *ctx;
uint16_t tab_reg[64];
int rc;
int i;
ctx = modbus_new_rtu("/dev/ttyUSB0", 9600, 'N', 8,1);
if (modbus_connect(ctx) == -1) {
fprintf(stderr, "Connection failed: %s\n", modbus_strerror(errno));
modbus_free(ctx);
return -1;
}
rc = modbus_set_slave(ctx, 1);
if (rc == -1) {
fprintf(stderr, "%s\n", modbus_strerror(errno));
return -1;
}
struct timeval response_timeout;
response_timeout.tv_sec = 5;
response_timeout.tv_usec = 0;
modbus_set_response_timeout(ctx, &response_timeout);
while(1){
modbus_connect(ctx);
rc = modbus_read_registers(ctx, 13952, 1, &tab_reg[0]);
if (rc == -1) {
fprintf(stderr, "%s\n", modbus_strerror(errno));
return -1;
}
usleep(17000); //max transaction timing.
rc = modbus_read_registers(ctx, 13954, 1, &tab_reg[1]);
if (rc == -1) {
fprintf(stderr, "%s\n", modbus_strerror(errno));
return -1;
}
for (i=0; i < 2; i++) {
printf("reg[%d]=%d (0x%X)\n", i, tab_reg[i], tab_reg[i]);
}
//modbus_flush(ctx);
//modbus_close(ctx);
usleep(10000);
modbus_close(ctx);
}
modbus_free(ctx);
return 0;
}
int _modbus_rtu_select(modbus_t *ctx, fd_set *rfds, struct timeval *tv, int length_to_read)
{
int s_rc;
#if defined(_WIN32)
s_rc = win32_ser_select(&(((modbus_rtu_t*)ctx->backend_data)->w_ser), length_to_read, tv);
if (s_rc == 0) {
errno = ETIMEDOUT;
return -1;
}
if (s_rc < 0) {
_error_print(ctx, "select");
if (ctx->error_recovery && (errno == EBADF)) {
modbus_close(ctx);
modbus_connect(ctx);
errno = EBADF;
return -1;
} else {
return -1;
}
}
#else
while ((s_rc = select(ctx->s+1, rfds, NULL, NULL, tv)) == -1) {
if (errno == EINTR) {
if (ctx->debug) {
fprintf(stderr, "A non blocked signal was caught\n");
}
/* Necessary after an error */
FD_ZERO(rfds);
FD_SET(ctx->s, rfds);
} else {
_error_print(ctx, "select");
if (ctx->error_recovery && (errno == EBADF)) {
modbus_close(ctx);
modbus_connect(ctx);
errno = EBADF;
return -1;
} else {
return -1;
}
}
}
if (s_rc == 0) {
/* Timeout */
errno = ETIMEDOUT;
_error_print(ctx, "select");
return -1;
}
#endif
return s_rc;
}
void *poll_modbus(void *ctx_p) {
int retval;
modbus_t *ctx = (modbus_t *) ctx_p;
/* Bring data into buffer */
while (1) {
/* TCP requests - may block */
GET_REGS(826, 826);
GET_REGS(352, 353);
GET_REGS(902, 902);
if (retval < 0) {
printf("modbus: Error on poll\n");
/* Attempt reconnect */
modbus_close(ctx);
if (modbus_connect(ctx) == -1) {
/* Kill the process */
exit(1);
}
}
pthread_mutex_lock(&modbus_lock);
modbus_data = priv_modbus_data;
pthread_mutex_unlock(&modbus_lock);
usleep(MODBUS_POLL_INTERVAL_US);
}
}
//open serial port
bool EnergyCamOpen(unsigned int dwPort ){
m_dwPort=dwPort;
char comDeviceName[100];
sprintf(comDeviceName, "/dev/ttyUSB%d", dwPort);
m_ctx = (modbus_t* )modbus_new_rtu(comDeviceName, m_dwBaud, 'E', 8, 1); // parity 'E'ven used by EnergyCam's freemodbus implementation
if(NULL == m_ctx)
return false;
modbus_set_debug( m_ctx, false);
modbus_set_slave( m_ctx, 1);
if (modbus_connect(m_ctx) == -1) {
fprintf(stderr, "Connection failed: %s\n", modbus_strerror(errno));
modbus_free(m_ctx);
m_ctx = NULL;
return false;
}
else{
printf,( "Connection OK: \n");
}
return true;
}
modbus_ctrl::modbus_ctrl(modbus_t* context) :
next_write_time(0),
shadow_registers()
{
this->context = context;
if(context == NULL)
{
throw modbus_exception();
}
//set timeout
struct timeval timeout_end;
struct timeval timeout_begin;
modbus_get_byte_timeout(context, &timeout_end);
timeout_end.tv_usec = TIMEOUT_END;
modbus_set_byte_timeout(context, &timeout_end);
modbus_get_response_timeout(context, &timeout_begin);
timeout_begin.tv_usec = TIMEOUT_BEGIN;
modbus_set_response_timeout(context, &timeout_begin);
//connect
if(modbus_connect(context) == -1)
{
throw modbus_exception();
}
}
int main(int argc, char *argv[])
{
modbus_t *mb;
uint16_t tab_reg[256];
uint8_t bit_reg[256];
int rc;
int i;
int actual;
mb = modbus_new_tcp("192.168.1.120", 502);
if (modbus_connect(mb) == -1)
{
fprintf(stderr, "modbus connect: %s\n", modbus_strerror(errno));
modbus_free(mb);
return -1;
}
sscanf(getenv("QUERY_STRING"),"%d",&actual);
printf("Content-type: text/plain\n\n");
/* Read 5 registers from the address 10 */
//rc = modbus_read_registers(mb, 100, 10, tab_reg);
rc = modbus_write_bit(mb,100,actual);
if (rc == -1) {
fprintf(stderr, "write bit: %s\n", modbus_strerror(errno));
return -1;
}
modbus_close(mb);
modbus_free(mb);
}
ModbusClientV1::ModbusClientV1(char* device)
{
ctx = modbus_new_rtu(device, 115200, 'E', 8, 1); // Port_name, Speed, Parity, Data_bits, Stop_bits
if (ctx == NULL)
{
fprintf(stderr, "Unable to create the libmodbus context\n");
return;
}
if (verbose > 4)
{
modbus_set_debug(ctx, 1);
}
int rc = modbus_set_slave(ctx, 1);
// Connecting to existing modbus socket
rc = modbus_connect(ctx);
if (rc == -1)
{
fprintf(stderr, "Connection failed [%s]\n", modbus_strerror(errno));
modbus_free(ctx);
return;
}
// Change bytes and response timeouts for connections
change_byte_timeout(0, 10000); /* 10 ms */
change_response_timeout(0, 100000); /* 100 ms */
isInitialized = true;
}
int main(int argc, char *argv[])
{
modbus_t *mb;
uint16_t tab_reg[256];
uint8_t bit_reg[256];
int rc;
int i;
if (argc != 4)
{
printf("name ip adress register and value\n");
exit(1);
}
int setvalue;
sscanf(argv[3],"%d",&setvalue);
int setregister;
sscanf(argv[2],"%d",&setregister);
mb = modbus_new_tcp(argv[1], 502);
if (modbus_connect(mb) == -1)
{
fprintf(stderr, "modbus connect: %s\n", modbus_strerror(errno));
modbus_free(mb);
return -1;
}
printf("%d=%d\n",setregister, setvalue);
rc = modbus_write_bit(mb,setregister,setvalue);
if (rc == -1) {
fprintf(stderr, "write registers: %s\n", modbus_strerror(errno));
return -1;
}
modbus_close(mb);
modbus_free(mb);
}
bool MainForm::checkModbus(){
if(m_modbus!=NULL){
modbus_close( m_modbus);
modbus_free( m_modbus );
m_modbus = NULL;
}
char parity;
if(Config::serialParity=="even"){
parity = 'E';
}else if(Config::serialParity=="odd"){
parity = 'O';
}else{
parity = 'N';
}
m_modbus = modbus_new_rtu(Config::serialinterface.toAscii().constData(), Config::serialBaudRate, parity,Config::serialDatabits,Config::serialStopbits );
int re= modbus_connect( m_modbus );
// qDebug()<<"re:"<<re<<endl;
return re != -1;
}
modbus_t * ModbusMaster::openPort(QString ip, quint16 port)
{
modbus_t * conn;
conn = modbus_new_tcp(ip.toStdString().c_str(), port);
if (conn)
{
if (modbus_connect(conn) == -1)
{
#ifdef QT_DEBUG_OUTPUT
qDebug() << "Connection failed: " << modbus_strerror(errno) << endl;
#endif
modbus_free(conn);
conn = 0;
}
}
else
{
#ifdef QT_DEBUG_OUTPUT
qDebug() << "New TCP failed: " << modbus_strerror(errno) << endl;
#endif
conn = 0;
}
return conn;
}
int MODBUSPuerto::abrir(){
log.info("%s: %s %s",__FILE__, "Comienza abrir puerto..",this->getName().data());
int res = 1 ;
//struct timeval response_timeout;
//response_timeout.tv_sec = 1;
//response_timeout.tv_usec = 0;
errno= 0;
if ((ctx = modbus_new_rtu(this->getName().data(), baudrate, 'N', 8, 1)) != NULL){
log.error("%s: %s %s",__FILE__, "Set slave error: ",modbus_strerror(errno));
modbus_set_slave(ctx, 0x01);
//log.error("%s: %s %s",__FILE__, "Set slave error: ",modbus_strerror(errno));
//modbus_set_response_timeout(ctx, &response_timeout);
if (errno != 0) log.error("%s: %s %s",__FILE__, "Set timeout error",modbus_strerror(errno));
if (modbus_connect(ctx) == -1) {
log.error("%s: %s %s",__FILE__, "Error al abrir puerto!",modbus_strerror(errno));
modbus_free(ctx);
res = 1;
this->isOpen = false ;
}
else {
this->isOpen = true ;
res = 0 ;
log.info("%s: %s",__FILE__, "Puerto abierto!!");
}
}
return res ;
}
void TSerialPort::Open()
{
if (Fd >= 0)
throw TSerialDeviceException("port already open");
if (modbus_connect(Context->Inner) < 0)
throw TSerialDeviceException("cannot open serial port");
Fd = modbus_get_socket(Context->Inner);
}
static int ctx_connect(lua_State *L)
{
ctx_t *ctx = ctx_check(L, 1);
int rc = modbus_connect(ctx->modbus);
return libmodbus_rc_to_nil_error(L, rc, 0);
}
/* Version 2.9.2 */
static int mb_init_connection (mb_host_t *host) /* {{{ */
{
int status;
if (host == NULL)
return (EINVAL);
if (host->connection != NULL)
return (0);
if (host->conntype == MBCONN_TCP)
{
if ((host->port < 1) || (host->port > 65535))
host->port = MODBUS_TCP_DEFAULT_PORT;
DEBUG ("Modbus plugin: Trying to connect to \"%s\", port %i.",
host->node, host->port);
host->connection = modbus_new_tcp (host->node, host->port);
if (host->connection == NULL)
{
ERROR ("Modbus plugin: Creating new Modbus/TCP object failed.");
return (-1);
}
}
else
{
DEBUG ("Modbus plugin: Trying to connect to \"%s\", baudrate %i.",
host->node, host->baudrate);
host->connection = modbus_new_rtu (host->node, host->baudrate, 'N', 8, 1);
if (host->connection == NULL)
{
ERROR ("Modbus plugin: Creating new Modbus/RTU object failed.");
return (-1);
}
}
#if COLLECT_DEBUG
modbus_set_debug (host->connection, 1);
#endif
/* We'll do the error handling ourselves. */
modbus_set_error_recovery (host->connection, 0);
status = modbus_connect (host->connection);
if (status != 0)
{
ERROR ("Modbus plugin: modbus_connect (%s, %i) failed with status %i.",
host->node, host->port ? host->port : host->baudrate, status);
modbus_free (host->connection);
host->connection = NULL;
return (status);
}
return (0);
} /* }}} int mb_init_connection */
int main() {
modbus_t *ctx;
uint16_t tab_reg[numero];
int rc;
int i;
ctx = modbus_new_tcp("192.168.2.18", 502);
if (modbus_connect(ctx) == -1) {
fprintf(stderr, "Connection failed: %s\n", modbus_strerror(errno));
modbus_free(ctx);
return -1;
}
struct timeval old_response_timeout;
struct timeval response_timeout;
/* Save original timeout */
//modbus_get_response_timeout(ctx, &old_response_timeout);
/* Define a new and too short timeout! */
//response_timeout.tv_sec = 2;
//response_timeout.tv_usec = 500000;
//modbus_set_response_timeout(ctx, &response_timeout);
//rc = modbus_set_slave(ctx, 49);
if (rc == -1) {
fprintf(stderr, "SET: %s\n", modbus_strerror(errno));
if (ctx!=NULL) {
fprintf(stderr,"CLOSE\n");
modbus_close(ctx);
modbus_free(ctx);
}
return -1;
}
rc = modbus_read_input_registers(ctx, direccion, numero, tab_reg);
if (rc == -1) {
fprintf(stderr, "HOLA: %s\n", modbus_strerror(errno));
if (ctx!=NULL) {
fprintf(stderr,"CLOSE\n");
modbus_close(ctx);
modbus_free(ctx);
}
return -1;
}
for (i=0; i < rc; i++) {
printf("reg[%d]=%d (0x%X)\n", i, tab_reg[i], tab_reg[i]);
}
modbus_close(ctx);
modbus_free(ctx);
}
int main(int argc, char **argv) {
if (argc != 3) {
fprintf(stdout, "\nUsage: %s <ip> <port>\n\n", argv[0]);
return -1;
}
char *ip = argv[1];
int port = atoi(argv[2]);
int rc;
uint16_t *register_values = malloc(sizeof(*register_values));
modbus_t *ctx = modbus_new_tcp(ip, port);
if (modbus_connect(ctx) == -1) {
fprintf(stderr, "Connection to %s port %d failed: %s\n", ip, port, modbus_strerror(errno));
modbus_end(ctx);
return -1;
}
/* generate exception 02 (starting address out of range) */
fprintf(stdout, "Test #1: Asking for out of bounds register (expected exception number 02)\n");
rc = modbus_read_registers(ctx, MODBUS_MAX_READ_REGISTERS+1, 1, register_values);
if (-1 == rc) {
fprintf(stderr, "Reading registers failed (modbus protocol exception number = %d). %s\n", errno - MODBUS_ENOBASE, modbus_strerror(errno));
}
sleep(1);
/* generate exception 02 (range of addresses requested out of range) */
/* Note: if the range goes beyond the protocol maximum, the returned errno will be 16, which is not a
* protocol exception code */
fprintf(stdout, "Test #2: Asking for out of bounds range of registers (expected exception number 02)\n");
rc = modbus_read_registers(ctx, 0, MODBUS_MAX_READ_REGISTERS-1, register_values);
if (-1 == rc) {
fprintf(stderr, "Reading registers failed (modbus protocol exception number = %d). %s\n", errno - MODBUS_ENOBASE, modbus_strerror(errno));
}
sleep(1);
/* generate exception 03 (quantity of registers out of bounds) */
fprintf(stdout, "Test #3: Asking for zero registers (expected exception number 03)\n");
rc = modbus_read_registers(ctx, 0, 0, register_values);
if (-1 == rc) {
fprintf(stderr, "Reading registers failed (modbus protocol exception number = %d). %s\n", errno - MODBUS_ENOBASE, modbus_strerror(errno));
}
sleep(1);
modbus_end(ctx);
free(register_values);
return 0;
}
static void *modbus_side (void *arg)
{
modbus_t *ctx;
uint16_t tab_reg[64];
int rc;
int i;
modbus_side_restart:
//ctx = modbus_new_tcp("127.0.0.1", 502);
ctx = modbus_new_tcp("140.159.153.159", 502);
// Use 140.159.153.159 for uni, 127.0.0.1 for home. Server port remains as 502 for both cases
// Initialize connection to modbus server
if(modbus_connect(ctx) == -1) // Connection to server failed
{
fprintf(stderr, "Connection to server failed: %s\n", modbus_strerror(errno));
modbus_free(ctx);
modbus_close(ctx);
usleep(100000); // Sleep for suggested delay time of 100ms
// Closing connection to retry again
goto modbus_side_restart;
}
else // Connection to server successful
{
fprintf(stderr, "Connection to server successful\n");
}
// Read registers
while(1)
{
rc = modbus_read_registers(ctx, 48, 2, tab_reg); // Device 48 allocated for Nick Hodson
if(rc == -1) // Read of registers failed
{
fprintf(stderr, "Reading of registers has failed: %s\n", modbus_strerror(errno));
// CLose modbus connection and start again (retry)
modbus_free(ctx);
modbus_close(ctx);
goto modbus_side_restart;
}
// not putting an else statement for succcessful read register as it will clog up the terminal window
for(i = 0; i < rc; i++) // Register display
{
add_to_list(&list_heads[i], tab_reg[i]); // replacement for printf statement
printf("register[%d] = %d (0x%X)\n", i, tab_reg[i], tab_reg[i]);
}
usleep(100000); // Sleep for suggested delay time of 100ms
}
}
int RTU_connect(void){
modbus_set_error_recovery(ctx, MODBUS_ERROR_RECOVERY_PROTOCOL);
if (modbus_connect(ctx)==0){
return 1;
}else{
#ifdef DEBUG_ENABLED
qWarning() << "Failed to Connect";
#endif
return 0;
}
}
void TcpIpSettingsWidget::changeModbusInterface(const QString &address, int portNbr)
{
releaseTcpModbus();
m_tcpModbus = modbus_new_tcp( address.toLatin1().constData(), portNbr );
if( modbus_connect( m_tcpModbus ) == -1 )
{
QMessageBox::critical( this, tr( "Connection failed" ),
tr( "Could not connect tcp/ip port!" ) );
ui->btnApply->setEnabled(true);
}
}
void ModBusTCP::Connect()
{
if (ctx != NULL)
{
if (modbus_connect(ctx) == -1)
{
qDebug() << "Connection failed: " << modbus_strerror(errno);
return;
}
}
}
virtual int MainSetup()
{
this->ctx = modbus_new_rtu(this->port, this->baud, 'N', 8, 1);
modbus_set_slave(this->ctx, this->uid);
if (modbus_connect(this->ctx) == -1) {
fprintf(stderr, "Connection failed: %s\n", modbus_strerror(errno));
return -1;
}
printf("Initialising modbus master on port=%s on speed=%d\n", this->port, this->baud);
return(0);
}
//==========================================================================================
int MainWindow::ReadTimeFromICPDAS(QString IPaddr, QDateTime *icpDT)
{
int res;
modbus_t *mb;
uint16_t tab_reg[200];
const uint number_readed_registers=6;
uint year=0;
uint month=0;
uint day=0;
uint hour=0;
uint minute=0;
uint second=0;
//inialized context
mb = modbus_new_tcp(IPaddr.toStdString().c_str(), 502);
if (mb==NULL) {return -1;}
res=modbus_connect(mb);
modbus_set_slave(mb, 1);
if (res==-1) {modbus_free(mb); return -2;}
res=modbus_read_registers(mb, 1, number_readed_registers, tab_reg);// 6 reg from 40002
if (res!=number_readed_registers){modbus_close(mb);modbus_free(mb); return -3;}
year=tab_reg[0];
month=tab_reg[1];
day=tab_reg[2];
hour=tab_reg[3];
minute=tab_reg[4];
second=tab_reg[5];
QDate dt;
dt.setDate(year,month,day);
QTime tm;
tm.setHMS(hour,minute,second);
icpDT->setDate(dt);
icpDT->setTime(tm);
modbus_close(mb);
modbus_free(mb);
return 1;
}
static int openSerial(const char *device, int baudrate, char parity, int data_bits, int stop_bits)
{
int ret = 0;
if (!mb) {
mb = modbus_new_rtu(device, baudrate, parity, data_bits, stop_bits);
struct timeval tv = { 0, 100000 };
modbus_set_response_timeout(mb, &tv);
modbus_set_debug(mb, 1);
ret = modbus_connect(mb);
if (ret < 0)
closeSerial();
}
return ret;
}
/* bacnet_Analog_Input_Present_Value_Set(2, test_data[index++]); */
if (index == NUM_TEST_DATA) index = 0;
not_pv:
return bacnet_Analog_Input_Read_Property(rpdata);
}
static bacnet_object_functions_t server_objects[] = {
{bacnet_OBJECT_DEVICE,
NULL,
bacnet_Device_Count,
bacnet_Device_Index_To_Instance,
bacnet_Device_Valid_Object_Instance_Number,
bacnet_Device_Object_Name,
bacnet_Device_Read_Property_Local,
bacnet_Device_Write_Property_Local,
bacnet_Device_Property_Lists,
bacnet_DeviceGetRRInfo,
NULL, /* Iterator */
NULL, /* Value_Lists */
NULL, /* COV */
NULL, /* COV Clear */
NULL /* Intrinsic Reporting */
},int main (void) {
modbus_t *mb;
uint16_t tab_reg[32];
mb = modbus_new_tcp("127.0.0.1", 502);
modbus_connect(mb);
//check connection
if (modbus_connect(mb) == -1) {
fprintf(stderr, "Connection failed: %s\n", modbus_strerror (errno));
modbus_free(mb);
return -1;
}
/* Read 5 registers from the address 0 */
modbus_read_registers(mb, 0, 5, tab_reg);
modbus_close(mb);
modbus_free(mb);
return 0;
}
modbus_t* modbus_new_tcp_device()
{
// ignore this. IP address.
modbus_t* pContext = modbus_new_tcp("192.168.1.12", 502);
modbus_set_slave(pContext, 2);
if (modbus_connect(pContext) < 0)
{
my_log_error("modbus_connect");
return NULL;
}
return pContext;
}
/* Initializing and connecting modbus */
modbus_t *modbus_init(char *path_to_config)
{
char ip[BUFFER_SIZE];
int port;
modbus_t *ctx = (modbus_t *) malloc(1);
/* Set default values */
sprintf(ip, "127.0.0.1");
port = 502;
/* Read Configuration */
log_entry(APP_NAME, "Reading Modbus - Configuration");
printf("\nReading Modbus - Configuration..\n");
port = getIntFromFile(path_to_config, "modbus_port");
if(getStringFromFile_n(path_to_config, "modbus_address", ip, BUFFER_SIZE) == -1) {
log_entry(APP_NAME, "Error reading modbus address");
printf("Error reading modbus_address..\n");
}
printf("IP-Address: %s\nport: %d\n", ip, port);
/* Set up modbus */
log_entry(APP_NAME, "Setting up and connecting Modbus");
printf("\nSetting up and connecting Modbus..\n");
ctx = modbus_new_tcp(ip, port);
/* Check Setup */
if(ctx == NULL) {
log_entry(APP_NAME, "Error setting up modbus");
printf("Error setting up modbus.\n");
return NULL;
}
/* Connect and set slave */
if(modbus_connect(ctx) != 0 || modbus_set_slave(ctx, MODBUS_SLAVE_ADDRESS) != 0) {
log_entry(APP_NAME, "Error connecting modbus");
printf("Error connecting modbus.\n");
return NULL;
}
/* Message to user */
log_entry(APP_NAME, "Setup and Connection successful");
printf("Setup and Connection successful.\n\n");
return ctx;
}
/* Version 2.0.3 */
static int mb_init_connection (mb_host_t *host) /* {{{ */
{
int status;
if (host == NULL)
return (EINVAL);
#if COLLECT_DEBUG
modbus_set_debug (&host->connection, 1);
#endif
/* We'll do the error handling ourselves. */
modbus_set_error_handling (&host->connection, NOP_ON_ERROR);
if (host->conntype == MBCONN_TCP)
{
if ((host->port < 1) || (host->port > 65535))
host->port = MODBUS_TCP_DEFAULT_PORT;
DEBUG ("Modbus plugin: Trying to connect to \"%s\", port %i.",
host->node, host->port);
modbus_init_tcp (&host->connection,
/* host = */ host->node,
/* port = */ host->port);
}
else /* MBCONN_RTU */
{
DEBUG ("Modbus plugin: Trying to connect to \"%s\".", host->node);
modbus_init_rtu (&host->connection,
/* device = */ host->node,
/* baudrate = */ host->baudrate,
'N', 8, 1, 0);
}
status = modbus_connect (&host->connection);
if (status != 0)
{
ERROR ("Modbus plugin: modbus_connect (%s, %i) failed with status %i.",
host->node, host->port ? host->port : host->baudrate, status);
return (status);
}
host->is_connected = 1;
return (0);
} /* }}} int mb_init_connection */
/* Version 2.9.2 */
static int mb_init_connection (mb_host_t *host) /* {{{ */
{
int status;
if (host == NULL)
return (EINVAL);
if (host->connection != NULL)
return (0);
/* Only reconnect once per interval. */
if (host->have_reconnected)
return (-1);
if ((host->port < 1) || (host->port > 65535))
host->port = MODBUS_TCP_DEFAULT_PORT;
DEBUG ("Modbus plugin: Trying to connect to \"%s\", port %i.",
host->node, host->port);
host->connection = modbus_new_tcp (host->node, host->port);
if (host->connection == NULL)
{
host->have_reconnected = 1;
ERROR ("Modbus plugin: Creating new Modbus/TCP object failed.");
return (-1);
}
modbus_set_debug (host->connection, 1);
/* We'll do the error handling ourselves. */
modbus_set_error_recovery (host->connection, 0);
status = modbus_connect (host->connection);
if (status != 0)
{
ERROR ("Modbus plugin: modbus_connect (%s, %i) failed with status %i.",
host->node, host->port, status);
modbus_free (host->connection);
host->connection = NULL;
return (status);
}
host->have_reconnected = 1;
return (0);
} /* }}} int mb_init_connection */
int MeterModbus::open() {
_mb = NULL;
_mb = modbus_new_tcp(ip(), _port);
if (_mb == NULL) {
print(log_error, "Unable to allocate libmodbus context: %s, %i", ip(), _port);
return ERR;
}
print(log_debug, "Connecting to %s:%i", name().c_str(), _ip.c_str(), _port);
if (modbus_connect(_mb) == -1) {
print(log_error, "Connection failed: %s",name().c_str(), modbus_strerror(errno));
modbus_free(_mb);
return ERR;
}
_reset_connection = false;
return SUCCESS;
}