This is the community page for KDE Connect. Feel free to edit it! It should contain useful and up to date resources for both users and developers.
KDE Connect is a project that enables all your devices to communicate with each other. Here's a few things KDE Connect can do:
To achieve this, KDE Connect:
This video from 2013 demonstrates some other cool features: https://www.youtube.com/watch?v=KkCFngNmsh0
You will most likely find the KDE Connect desktop component as a package in your distribution's repos. If not you can ask them to package it.
Despite a common misconception you can use KDE Connect on all desktop environments. Since most of the developers are using Plasma it may occur that a feature is broken or inaccessible on other desktop environments. In this case, please report it as a bug. There are multiple ways to enhance the KDE Connect experience on non-Plasma desktops. If you are a GNOME user you might prefer GSConnect, a GNOME shell extension. For desktops with AppIndicator support (Budgie, Cinnamon, LXDE, Pantheon, Unity) indicator-kdeconnect is available.
There was some development of a KDE Connect client app for iOS in 2014 (see source code) but due to our experience and various technical and organizational factors it's unlikely that we will have official iOS support anytime soon.
KDE Connect is also available on SailfishOS and we are working on bringing it to other Linux-based phones (Plasma Mobile, PostmarketOS etc.)
Plasma Browser Integration makes KDE Connect even more powerful. It allows you to control content from e.g. Youtube or Netflix from your phone and send browser tabs to your phone. Despite the name it can also be used on non-Plasma desktops.
An alternative native extension for Chrome/Chromium (or compatible) and Firefox users, lets you "send pages and content from your browser to connected KDE Connect devices, via browser action or context menu." See its Github page for installation instructions.
There may be a variety of reasons for using KDE Connect with a VPN. Maybe you have left home and want to run a command or maybe you’re on a public wifi network where your devices aren’t allowed to communicate and you want to use remote control to give a presentation.
If you have your own server with a public-facing IP address, you can set up OpenVPN yourself. OpenVPN is not the easiest piece of software to set up, but by following a setup tutorial such as this one, you should be able to manage: https://openvpn.net/howto.html
In order to allow UDP broadcast packets, which are what KDE Connect uses to automatically discover two devices, OpenVPN needs to be set up for bridging (TAP device). If you use a tun device, you can still manually connect by IP address.
If you want to rent a pre-configured OpenVPN service rather than set up your own it should work, but the same considerations about the server settings need to be taken into account.
Once the server is running, you can use the official OpenVPN client to connect the desktop to the server. There is no official OpenVPN client for Android, but I find that the OpenVPN for Android client works well: https://play.google.com/store/apps/details?id=de.blinkt.openvpn
Once both devices are connected, test that they are able to communicate over the VPN by trying to do a network ping between them.
If your OpenVPN instance is set up for bridging, KDE Connect should work just like on a local network
If you are using OpenVPN with a tun device, you will have to manually add your devices by IP. Then, once you connect to the VPN, KDE Connect should automatically detect your device and either connect or be ready for pairing!
If you want to build KDE Connect yourself, you'll first need to grab the code from git.
git clone git://anongit.kde.org/kdeconnect-kde.git
KDE Connect uses cmake as a build system, which will tell you if you are missing any dependencies. On some distros you will need to install some development packages. On Ubuntu you can use
sudo apt-get build-dep kdeconnect to install all build dependencies. On openSUSE you can use
sudo zypper si -d kdeconnect-kde.
To configure use
cd kdeconnect-kde mkdir build cd build cmake -DCMAKE_INSTALL_PREFIX=/usr ..
To build use
make sudo make install
If you are intending to develop KDE Connect or experience a crash and are asked to give a backtrace, build KDE Connect with debugging symbols:
cmake -DCMAKE_INSTALL_PREFIX=/usr -DCMAKE_BUILD_TYPE=Debug ..
If you install KDE Connect in a custom location you'll need to run
kdeconnectd manually, since DBus doesn't know about it.
For instruction on how to integrate it in KDevelop check out this blog post
You can find the code at git://anongit.kde.org/kdeconnect-android.git. It's easiest to use Android Studio to build the app and install it to your phone. Using the emulator is possible, but need an advanced networking setup (the emulator needs to be on the same subnet as the PC, or you won't be able to connect to your desktop.
KDE Connect uses dynamic ports in the range 1714-1764 for UDP and TCP. So if you are behind a firewall, make sure to open this port range for both TCP and UDP. Otherwise, make sure your network is not blocking UDP broadcast packets.
If your firewall is ufw, you can open the necessary ports with:
sudo ufw allow 1714:1764/udp sudo ufw allow 1714:1764/tcp sudo ufw reload
If your firewall is firewalld, you can open the necessary ports with:
sudo firewall-cmd --zone=public --permanent --add-port=1714-1764/tcp sudo firewall-cmd --zone=public --permanent --add-port=1714-1764/udp sudo systemctl restart firewalld.service
In Fedora there is a program to configure the firewall. Open Firewall Configuration (the program's filename is
firewall-config), and in Zones ➔ Services check the kde-connect service.
Make sure you have chosen the Permanent Configuration in the drop down at the top, other wise these settings will be reset upon reboot.
If your firewall is iptables, you can open the necessary ports with:
sudo iptables -A INPUT -i <yourinterface> -p udp --dport 1714:1764 -m state --state NEW,ESTABLISHED -j ACCEPT sudo iptables -A INPUT -i <yourinterface> -p tcp --dport 1714:1764 -m state --state NEW,ESTABLISHED -j ACCEPT sudo iptables -A OUTPUT -i <yourinterface> -p udp --sport 1714:1764 -m state --state NEW,ESTABLISHED -j ACCEPT sudo iptables -A OUTPUT -i <yourinterface> -p tcp --sport 1714:1764 -m state --state NEW,ESTABLISHED -j ACCEPT
Sometimes, a corrupt config file may cause KDE Connect to crash when trying to pair with a device. In that case, deleting the config ~/.config/kdeconnect might help.
Yes, you can pass the command line argument `-platform offscreen` to the daemon (eg: `killall -9 kdeconnectd; /usr/lib/libexec/kdeconnectd -platform offscreen`)
In case you find a bug and want to report it, you can do so in the KDE bug tracker.
KDE Connect is a perfect project to start contributing to KDE. You'll need a basic understanding of programming concepts, the rest can be learned by doing. Experience with Android or Qt is beneficial, but not needed.
We have a group to discuss development. You can access it from Telegram, IRC (#kdeconnect) or matrix.org (#freenode_#kdeconnect:matrix.org). Feel free to ask any development related questions there, We also have a mailing list.
You can submit patches on our Phabricator. This wiki page has more details on how this process works. For the reviewer, put in #kde_connect. Should this be your first patch, it's good to know that it might take some time before your patch is reviewed (we all work on KDE Connect in our free time), and you'll probably have to make some changes a couple of times. That's not because you're new, that's what happens for all reviews (even for long-time contributors).
There are a couple of tasks marked as Junior Jobs on our workboard. Those have some extra information on how to approach them that help you get started.