modbus_get_slave

Name

modbus_get_slave - get slave number in the context

Synopsis
    int modbus_get_slave(modbus_t *ctx);

Description

The modbus_get_slave() function shall get the slave number in the libmodbus context.

Return value

The function shall return the slave number if successful. Otherwise it shall return -1 and set errno to one of the values defined below.

Errors

    •   EINVAL, the libmodbus context is undefined.

See also

    •   modbus_set_slave ⟨modbus_set_slave.md⟩