1MODBUS_CONNECT(3)              Libmodbus Manual              MODBUS_CONNECT(3)
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NAME

6       modbus_connect - establish a Modbus connection
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SYNOPSIS

9       int modbus_connect(modbus_t *ctx);
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DESCRIPTION

12       The modbus_connect() function shall etablish a connection to a Modbus
13       server, a network or a bus using the context information of libmodbus
14       context given in argument.
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RETURN VALUE

17       The modbus_connect() function shall return 0 if successful. Otherwise
18       it shall return -1 and set errno to one of the values defined by the
19       system calls of the underlying platform.
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EXAMPLE

22           modbus_t *ctx;
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24           ctx = modbus_new_tcp("127.0.0.1", 502);
25           if (modbus_connect(ctx) == -1) {
26               fprintf(stderr, "Connection failed: %s\n", modbus_strerror(errno));
27               modbus_free(ctx);
28               return -1;
29           }
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SEE ALSO

32       modbus_close(3)
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AUTHORS

35       The libmodbus documentation was written by Stéphane Raimbault
36       <stephane.raimbault@gmail.com[1]>
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NOTES

39        1. stephane.raimbault@gmail.com
40           mailto:stephane.raimbault@gmail.com
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44libmodbus 3.0.8                   07/31/2019                 MODBUS_CONNECT(3)