+=head2 Plugin C<gps>
+
+The C<gps plugin> connects to gpsd on the host machine.
+The host, port, timeout and pause are configurable.
+
+This is useful if you run an NTP server using a GPS for source and you want to
+monitor it.
+
+Mind your GPS must send $--GSA for having the data reported!
+
+The following elements are collected:
+
+=over 4
+
+=item B<satellites>
+
+Number of satellites used for fix (type instance "used") and in view (type
+instance "visible"). 0 means no GPS satellites are visible.
+
+=item B<dilution_of_precision>
+
+Vertical and horizontal dilution (type instance "horizontal" or "vertical").
+It should be between 0 and 3.
+Look at the documentation of your GPS to know more.
+
+=back
+
+Synopsis:
+
+ LoadPlugin gps
+ <Plugin "gps">
+ # Connect to localhost on gpsd regular port:
+ Host "127.0.0.1"
+ Port "2947"
+ # 15 ms timeout
+ Timeout 0.015
+ # PauseConnect of 5 sec. between connection attempts.
+ PauseConnect 5
+ </Plugin>
+
+Available configuration options:
+
+=over 4
+
+=item B<Host> I<Host>
+
+The host on which gpsd daemon runs. Defaults to B<localhost>.
+
+=item B<Port> I<Port>
+
+Port to connect to gpsd on the host machine. Defaults to B<2947>.
+
+=item B<Timeout> I<Seconds>
+
+Timeout in seconds (default 0.015 sec).
+
+The GPS data stream is fetch by the plugin form the daemon.
+It waits for data to be available, if none arrives it times out
+and loop for another reading.
+Mind to put a low value gpsd expects value in the micro-seconds area
+(recommended is 500 us) since the waiting function is blocking.
+Value must be between 500 us and 5 sec., if outside that range the
+default value is applied.
+
+This only applies from gpsd release-2.95.
+
+=item B<PauseConnect> I<Seconds>
+
+Pause to apply between attempts of connection to gpsd in seconds (default 5 sec).
+
+=back
+
+=head2 Plugin C<grpc>
+
+The I<grpc> plugin provides an RPC interface to submit values to or query
+values from collectd based on the open source gRPC framework. It exposes an
+end-point for dispatching values to the daemon.
+
+The B<gRPC> homepage can be found at L<https://grpc.io/>.
+
+=over 4
+
+=item B<Server> I<Host> I<Port>
+
+The B<Server> statement sets the address of a server to which to send metrics
+via the C<DispatchValues> function.
+
+The argument I<Host> may be a hostname, an IPv4 address, or an IPv6 address.
+
+Optionally, B<Server> may be specified as a configuration block which supports
+the following options:
+
+=over 4
+
+=item B<EnableSSL> B<false>|B<true>
+
+Whether to require SSL for outgoing connections. Default: false.
+
+=item B<SSLCACertificateFile> I<Filename>
+
+=item B<SSLCertificateFile> I<Filename>
+
+=item B<SSLCertificateKeyFile> I<Filename>
+
+Filenames specifying SSL certificate and key material to be used with SSL
+connections.
+
+=back
+
+=item B<Listen> I<Host> I<Port>
+
+The B<Listen> statement sets the network address to bind to. When multiple
+statements are specified, the daemon will bind to all of them. If none are
+specified, it defaults to B<0.0.0.0:50051>.
+
+The argument I<Host> may be a hostname, an IPv4 address, or an IPv6 address.
+
+Optionally, B<Listen> may be specified as a configuration block which
+supports the following options:
+
+=over 4
+
+=item B<EnableSSL> I<true>|I<false>
+
+Whether to enable SSL for incoming connections. Default: false.
+
+=item B<SSLCACertificateFile> I<Filename>
+
+=item B<SSLCertificateFile> I<Filename>
+
+=item B<SSLCertificateKeyFile> I<Filename>
+
+Filenames specifying SSL certificate and key material to be used with SSL
+connections.
+
+=back
+
+=back
+