Problem with receiving SerialStream

[Pantau123]

Hi, i use the main branch version of Seriallib with SerialStream. I can not read characters with << from the SerialStream. I can only read the function SerialStream.read(char*,streamsize), but everytime i receive a leading '\0' and i have to create a char array with receivedbytes +1. Can anybody help me? Bests Pantau File main.cpp (sender)

#include <cstdio>
#include <libserial/SerialStream.h>

using namespace LibSerial;
using namespace std;

int main()
{
    SerialStream m_serialPort;
    BaudRate defaultBaudRate = BaudRate::BAUD_9600;
    CharacterSize defaultCharacterSize = CharacterSize::CHAR_SIZE_8;
    FlowControl defaultFlowControl = FlowControl::FLOW_CONTROL_NONE;
    Parity defaultParity = Parity::PARITY_NONE;
    StopBits defaultStopBits = StopBits::STOP_BITS_1;
    int defaultBufferSize = 50;
    m_serialPort.SetBaudRate(defaultBaudRate);
    m_serialPort.SetCharacterSize(defaultCharacterSize);
    m_serialPort.SetFlowControl(defaultFlowControl);
    m_serialPort.SetParity(defaultParity);
    m_serialPort.SetStopBits(defaultStopBits);
    m_serialPort.SetVMin(0);
    m_serialPort.SetVTime(0);
    m_serialPort.FlushIOBuffers();
    m_serialPort.Open("/dev/ttyS1");
    std::string my_string = "Hello, Serial Port.";
    m_serialPort << my_string << endl;
    m_serialPort.DrainWriteBuffer();
    m_serialPort.Close();
    return 0;
}

File main.cpp (receiver)

#include <cstdio>
#include <libserial/SerialStream.h>
#include <sstream>
#include <unistd.h>
#include <iostream>
using namespace LibSerial;
using namespace std;
int main()
{
    SerialStream m_serialPort;
    BaudRate defaultBaudRate = BaudRate::BAUD_9600;
    CharacterSize defaultCharacterSize = CharacterSize::CHAR_SIZE_8;
    FlowControl defaultFlowControl = FlowControl::FLOW_CONTROL_NONE;
    Parity defaultParity = Parity::PARITY_NONE;
    StopBits defaultStopBits = StopBits::STOP_BITS_1;
    int defaultBufferSize = 50;
    m_serialPort.SetBaudRate(defaultBaudRate);
    m_serialPort.SetCharacterSize(defaultCharacterSize);
    m_serialPort.SetFlowControl(defaultFlowControl);
    m_serialPort.SetParity(defaultParity);
    m_serialPort.SetStopBits(defaultStopBits);
    m_serialPort.SetVMin(0);
    m_serialPort.SetVTime(0);

    auto serialPorts = m_serialPort.GetAvailableSerialPorts();
    m_serialPort.Open("/dev/ttyS2");
    m_serialPort.FlushIOBuffers();
    stringstream rcvBuffer;

    bool foundString = false;

    while (foundString!=true)
    {
        bool streamGood = false;
        while (m_serialPort.rdbuf()->in_avail() == 0)
        {
            usleep(50);
        }
        int receivingBytes = m_serialPort.GetNumberOfBytesAvailable();
        int read = m_serialPort.rdbuf()->in_avail();
        char character[read+1];//+1 because have a trailling zero
        m_serialPort.read(character, read+1);
        cout << character << endl;

    }
    m_serialPort.Close();
    return 0;
}

[crayzeewulf]

Are you expecting null bytes or whitespaces in your input. Maybe have a look at #162.

[Pantau123]

No i don't expect a null byte but it can be a whitespace.

[Pantau123]

But the problem is where does the leading '\0' come from?

[Pantau123]

with noskipws i receive the data with <<

[mcsauder]

Hi @Pantau123 , did that resolve this issue for you?