SetDatapointValue.cpp

This sample shows how to set datapoint values via the connection API

Datapoint

Usage:

SetDatapointValue <ip_address>
// e.g.:
SetDatapointValue 10.0.0.102

Pre-condition: It assumes that the following datapoints are configured:

|---------|-----------------|-----------------------------|-------------|---------------|
| Number  |  DPT            |  Name                       |  SizeInBit  |  Flags        |
|         |                 |                             |             | C R W T U I   |
|---------|-----------------|-----------------------------|-------------|---------------|
|    1    | DPT 01 - 1 bit  | Actuator A - Switch         | 1           | C - W - - -   |
|---------|-----------------|-----------------------------|-------------|---------------|
|    2    | DPT 01 - 1 bit  | Actuator A - State          | 1           | C R - T - -   |
|---------|-----------------|-----------------------------|-------------|---------------|
|    3    | DPT 01 - 1 bit  | Actuator B - Switch         | 1           | C - W - - -   |
|---------|-----------------|-----------------------------|-------------|---------------|
|    4    | DPT 01 - 1 bit  | Actuator B - State          | 1           | C R - T - -   |
|---------|-----------------|-----------------------------|-------------|---------------|
|   100   | DPT 01 - 1 bit  | not linked with group       | 1           | - - W T - -   | <- not linked with a group address
|---------|-----------------|-----------------------------|-------------|---------------|

Note

Another possibility is via the device API.
See also: Sample 04_BaosDatapointValues.cpp

//
// Copyright (c) 2002-2026 WEINZIERL ENGINEERING GmbH
// All rights reserved.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
// SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY DAMAGES OR OTHER LIABILITY,
// WHETHER IN CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE
//
 
#include "Helper.h"
 
#include <baos/Sdk.h>
#include <baos/ip/BaosTcpConnection.h>
#include <baos/protocol/Defines.h>
#include <wzcpp/features/utils.h>
 
#include <iostream>
#include <memory>
 
using utility::CommandLineOptions;
using wz::baos::setBaosLogLevel;
using namespace wz::baos;
using namespace wz::baos::ip;
using namespace wz::baos::protocol;
 
/******************************************
** Main
*******************************************/
 
int main(int argc, char* argv[])
{
    try
    {
        std::cout << "******************************************" << std::endl;
        std::cout << "SetDatapointValue sample" << std::endl;
        std::cout << "******************************************" << std::endl;
        std::cout << std::endl;
 
        // Reduce log messages
        setBaosLogLevel(wz::baos::LogLevel::warn);
 
        // The CommandLineOptions::parse function
        // validates the arguments and handles the help command
        CommandLineOptions options;
        options.parse(argc, argv);
        if (options.wasHelpdisplayed())
        {
            return 0;
        }
 
        // Get the ip address from the parsed command line options
        const std::string ipAddress = options.getIpAddress();
        std::cout << " Connection requested for " << ipAddress << std::endl;
 
        // Create a TPC/IP connection to the remote BAOS device
        BaosTcpConnection connection;
        connection.open(ipAddress);
 
 
        // Set some datapoint values (single item per request)
        std::cout << "Set some datapoint values (single item per request)" << std::endl;
 
        // id = 1 (DPT 01 - 1 bit)
        connection.setDpValue(1, DatapointChangeValue{{0x00}, DatapointSetCommand::SetNewValue});
 
        // Set multiple datapoint values (multiple items per request)
        std::cout << "Set multiple datapoint values (multiple items per request)" << std::endl;
 
        // id = 1, 2, 3 and 4
        connection.setDpValues(
            DatapointChangeValues{{1, DatapointChangeValue{{0x01}, DatapointSetCommand::SetNewValue}},
                                  {2, DatapointChangeValue{{0x01}, DatapointSetCommand::SetNewValueAndSendOnBus}},
                                  {3, DatapointChangeValue{{0x00}, DatapointSetCommand::SetNewValue}},
                                  {4, DatapointChangeValue{{0x00}, DatapointSetCommand::SetNewValueAndSendOnBus}}});
        std::cout << std::endl;
 
 
        // Set some datapoint values (check if the datapoint is linked with group address)
        std::cout << "Set some datapoint values (check if the datapoint is linked with group address)" << std::endl;
 
        // read configuration
        std::cout << "    Read datapoint configuration" << std::endl;
        const auto result = connection.getDpDescription(100);
 
        // validate
        if (!result.has_value())
        {
            std::cout << "Warning: Datapoint not exist" << std::endl;
            return -1;
        }
 
        const DatapointDescription& desc = result.value();
        bool isDpValid = desc.flags.communication;
        if (isDpValid)
        {
            std::cout << "    Datapoint is config with group address" << std::endl;
            try
            {
                connection.setDpValue(100, DatapointChangeValue{{0x00}, DatapointSetCommand::SetNewValue});
            }
            catch (const std::exception& e)
            {
                std::cerr << "Failed: " << e.what() << std::endl;
            }
        }
        else
        {
            std::cout << "    Datapoint is not config with group address" << std::endl;
        }
    }
    catch (const std::exception& e)
    {
        std::cerr << "Failed: " << e.what() << std::endl;
        return -1;
    }
 
    return 0;
}