08_Counter.cpp

This sample shows how to read a parameter and write datapoint values via the device API.

Usage:

08_Counter <ip_address>
// e.g.:
08_Counter 10.0.0.102

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

Datapoints:
|---------|-----------------|-----------------------------|-------------|---------------|
|   Id    |  DPT            |  Name                       |  SizeInBit  |  Flags        |
|         |                 |                             |             | C R W T U I   |
|---------|-----------------|-----------------------------|-------------|---------------|
|    9    | DPT 01 - 1 bit  | Do Add                      | 1           | C - W - - -   |
|---------|-----------------|-----------------------------|-------------|---------------|
|   10    | DPT 07          | Counter                     | 16          | C R W T U -   |
|---------|-----------------|-----------------------------|-------------|---------------|

Parameter:
|---------|-----------------|-----------------------------|-------------|
| Number  |  Size           |  Name                       |  Value      |
|         |                 |                             |             |
|---------|-----------------|-----------------------------|-------------|
|   2     | 1 Byte          | Step                        | 10          |
|---------|-----------------|-----------------------------|-------------|

//
// 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/BaosIpv4Device.h>
#include <baos/ip/BaosTcpConnection.h>
#include <baos/protocol/Defines.h>
 
#include <iostream>
#include <exception>
#include <memory>
#include <thread>
 
using utility::CommandLineOptions;
using wz::baos::setBaosLogLevel;
using namespace wz::baos;
using namespace wz::baos::ip;
using namespace wz::baos::protocol;
 
/******************************************
** Anonymous namespace
*******************************************/
 
namespace
{
 
enum Datapoints : std::uint16_t
{
    DoAdd = 9, 
    Counter  = 11, 
};
 
enum Parameters : std::uint16_t
{
    Step = 2 
};
 
// NOTE: Overflow not handled here 
void doAdd(BaosIp4Device& baosDevice)
{
    // Get parameter for step
    ParameterBytes parameterBytes = baosDevice.getParameterBytes(Parameters::Step, 1);
    std::uint8_t step = parameterBytes.at(0);
    
    // Get current value
    std::uint16_t counter = 0;
    auto maybeValue = baosDevice.getDpValueRaw(Datapoints::Counter);
    if (maybeValue.has_value())
    {
        counter = (maybeValue->at(0) << 8) | maybeValue->at(1);
    }
 
    // Calculate new value
    counter += step;
 
    // Write new value
    std::uint8_t highByte = (counter & 0xFF00) >> 8;
    std::uint8_t lowByte = counter & 0xFF;
    baosDevice.setDpValue(1, {highByte, lowByte}, DatapointSetCommand::SetNewValueAndSendOnBus);
}
 
}
 
/******************************************
** Main
*******************************************/
 
int main(int argc, char* argv[])
{
    try
    {
        std::cout << "******************************************" << std::endl;
        std::cout << "08_Counter 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.setDurationOptionSupported(true);
        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
        BaosIp4Device baosDevice(ipAddress);
        
        // read static server items
        // NOTE: This does an auto connect
        const DeviceStaticInfo staticInfo = baosDevice.getStaticInfo();
 
        // register callback function for datapoint value indications
        baosDevice.registerDPValueCallback(
            [&baosDevice](const DatapointValues& values)
        {
                for (const auto& item : values)
                {
                    std::uint16_t id            = item.first;
                    const DatapointValue& value = item.second;
 
                    std::cout << "Received datapoint value indication for id " << id << std::endl;
 
                    switch (id)
                    {
                        case Datapoints::DoAdd:
                            std::cout << "Add step value to counter " << std::endl;
                            doAdd(baosDevice);
                            break;
                        case Datapoints::Counter:
                            std::cout << "Counter was changed from other (bus or other baos client)" << std::endl;
                            break;
                        default:
                            std::cout << "Nothing to do" << std::endl;
                    }
                }
        });
        
        // Default behaviour is interactive: wait for user input.
        // For automated runs the sample can terminate automatically after N seconds.
        if (options.isInteractive())
        {
            // Wait for Enter, all indications will be shown in the callback event handlers.
            std::cout << "Press [Enter] to exit the application ..." << std::endl;
            std::getchar();
        }
        else
        {
            // Wait for End, all indications will be shown in the callback event handlers.
            const std::int32_t durationSeconds = options.getDurationSeconds();
            std::cout << "Listening for indications for " << durationSeconds << " seconds ..." << std::endl;
            std::this_thread::sleep_for(std::chrono::seconds(durationSeconds));
        }
    }
    catch (const std::exception& e)
    {
        std::cerr << "Failed: " << e.what() << std::endl;
        return -1;
    }
 
    return 0;
}