ROS 2 DDS

ROS 2 DDS settings

~/.bashrc

export ROS_DOMAIN_ID=0
export RMW_IMPLEMENTATION=rmw_cyclonedds_cpp
# export FASTRTPS_DEFAULT_PROFILES_FILE=/home/<user>/fastdds_profile.xml
export CYCLONEDDS_URI=/home/<user>/cyclone_profile.xml

cyclone_profile.xml file

<CycloneDDS xmlns="https://cdds.io/config" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="https://cdds.io/config https://raw.githubusercontent.com/eclipse-cyclonedds/cyclonedds/master/etc/cyclonedds.xsd">
    <Domain id="any">
         <General>
           <Interfaces>
              <NetworkInterface name="tun0"  multicast="false" />
           </Interfaces>
           <AllowMulticast>false</AllowMulticast>
           <EnableMulticastLoopback>false</EnableMulticastLoopback>
        </General>

        <Discovery>
            <Peers>
                <Peer address="10.8.0.10"/> <!-- lexus.opn -->
                <Peer address="10.8.0.11"/> <!-- teleopstation.opn -->
                <Peer address="10.8.0.12"/> <!-- nisssan -->
                <Peer address="10.8.0.15"/> <!-- lexus-bme.ovpn -->
                <Peer address="10.8.0.17"/> <!-- gamma-rover.ovpn -->
                <Peer address="10.8.0.18"/> <!-- gamma-station.ovpn -->
                <Peer address="10.8.0.1"/>
            </Peers>
            <ParticipantIndex>auto</ParticipantIndex>
        </Discovery>

       <Domain id="any">
         <SharedMemory>
            <Enable>true</Enable>
            <SubQueueCapacity>256</SubQueueCapacity>
            <SubHistoryRequest>16</SubHistoryRequest>
            <PubHistoryCapacity>16</PubHistoryCapacity>
            <LogLevel>info</LogLevel>
         </SharedMemory>
       </Domain>

        <!--
        <Tracing>
            <Verbosity>config</Verbosity>
            <OutputFile>stdout</OutputFile>
        </Tracing>
        -->
    </Domain>
</CycloneDDS>

fastdds_profile.xml file

<?xml version="1.0" encoding="UTF-8" ?>
<profiles xmlns="http://www.eprosima.com/XMLSchemas/fastRTPS_Profiles">
    <participant profile_name="initial_peers_profile" is_default_profile="true" >
        <rtps>
            <builtin>
                <initialPeersList>
                    <locator>
                        <udpv4>
                            <address>10.8.0.10</address> <!-- lexus.opn -->
                        </udpv4>
                        <udpv4>
                            <address>10.8.0.11</address> <!-- teleopstation.opn -->
                        </udpv4>
                        <udpv4>
                            <address>10.8.0.12</address> <!-- nissan -->
                        </udpv4>
                        <udpv4>
                            <address>10.8.0.15</address> <!-- lexus-bme.ovpn -->
                        </udpv4>
                        <udpv4>
                            <address>10.8.0.17</address> <!-- gamma-rover.ovpn -->
                        </udpv4>
                        <udpv4>
                            <address>10.8.0.18</address> <!-- gamma-station.ovpn -->
                        </udpv4>
                    </locator>
                </initialPeersList>
            </builtin>
        </rtps>
    </participant>
</profiles>

sudo apt install openvpn

/etc/default/openvpn  ## autostart

sudo systemctl enable openvpn

systemctl status openvpn

systemctl restart openvpn

ros2 daemon status

ros2 daemon start

ros2 daemon stop