added some systemd documentation

README.md

@@ -31,6 +31,36 @@ The following OSC messages can be sent to the server.
 /get/cpu
 ```
 
+It's running as a systemd service with the following configuration at */etc/systemd/system/osc_server.service*.
+
+```bash
+[Unit]
+Description=OSC server for puredata
+After=network.target
+
+[Service]
+Type=simple
+User=pi
+Group=pi
+WorkingDirectory=/home/pi/sources/puredata/
+ExecStart=/usr/bin/python3 osc_server.py
+StandardOutput=syslog
+StandardError=syslog
+
+[Install]
+WantedBy=multi-user.target
+```
+
+Controlling the service is done with the following commands.
+
+```bash
+sudo systemctl start osc_server.service
+sudo systemctl stop osc_server.service
+sudo systemctl restart osc_server.service
+sudo systemctl status osc_server.service
+
+```
+
 # todo
 
 * have each chapter be more verbose