diff --git a/README.md b/README.md
index a6987c7..1f7f5b2 100644
--- a/README.md
+++ b/README.md
@@ -53,6 +53,22 @@ sudo make install
 There are three modes of operation implemented offering different
 compatibility to performance.
 
+### Use a preconfigured systemd services
+
+The simplest is to use preconfigured `service/camera-streamer*.service`.
+Those can be used as an example, and can be configured to fine tune parameters.
+
+Example:
+
+```bash
+systemctl enable $PWD/service/camera-streamer-arducam-16MP.service
+systemctl start camera-streamer-arducam-16MP
+```
+
+If everything was OK, there will be web-server at `http://<IP>:8080/`.
+
+Error messages can be read `journalctl -xef -u camera-streamer-arducam-16MP`.
+
 ### High-compatibility via `libcamera`
 
 This script uses `libcamera` to access camera and provide
diff --git a/service/camera-streamer.service b/service/camera-streamer-arducam-16MP.service
similarity index 65%
rename from service/camera-streamer.service
rename to service/camera-streamer-arducam-16MP.service
index 33fc3b7..7beea38 100644
--- a/service/camera-streamer.service
+++ b/service/camera-streamer-arducam-16MP.service
@@ -3,21 +3,22 @@ Description=camera-streamer web camera
 After=network.target
 
 [Service]
-User=nobody
-Group=nogroup
-SupplementaryGroups=video i2c
 ExecStart=/usr/local/bin/camera-streamer \
   -camera-path=/base/soc/i2c0mux/i2c@1/imx519@1a \
   -camera-type=libcamera \
   -camera-format=YUYV \
   -camera-width=2328 -camera-height=1748 \
-  -camera-high_res_factor=1.5 \
-  -camera-fps=30
-# set auto-focus for IMX519
-ExecStartPost=-/bin/bash -c 'sleep 3s; /usr/sbin/i2ctransfer -y 11 w4@0x0c 0x0 0x85 0x00 0x00'
+  -camera-fps=30 \
+  -camera-nbufs=2 \ # use two memory buffers to optimise usage
+  -camera-high_res_factor=1.5 \ # the high-res is 1552x1165
+  -camera-low_res_factor=3.0 \ # the low-res is 776x582
+  -camera-options=brightness=0.1 # bump brightness slightly
+
+User=nobody
+Group=nogroup
+SupplementaryGroups=video i2c
 Restart=always
 RestartSec=10
-
 Nice=10
 IOSchedulingClass=idle
 IOSchedulingPriority=7
diff --git a/service/camera-streamer-arducam-64MP.service b/service/camera-streamer-arducam-64MP.service
new file mode 100644
index 0000000..528c151
--- /dev/null
+++ b/service/camera-streamer-arducam-64MP.service
@@ -0,0 +1,32 @@
+[Unit]
+Description=camera-streamer web camera
+After=network.target
+
+[Service]
+ExecStartPre=-/usr/bin/v4l2-ctl -d /dev/v4l-subdev1 -c focus_absolute=2200 # set fixed-focus
+ExecStart=/usr/local/bin/camera-streamer \
+  -camera-path=/base/soc/i2c0mux/i2c@1/arducam_64mp@1a \
+  -camera-type=libcamera \
+  -camera-format=YUYV \
+  -camera-width=2328 -camera-height=1748 \
+  -camera-fps=30 \
+  -camera-nbufs=2 \ # use two memory buffers to optimise usage
+  -camera-high_res_factor=1.5 \ # the high-res is 1552x1165
+  -camera-low_res_factor=3.0 \ # the low-res is 776x582
+  -camera-options=brightness=0.1 \ # bump brightness slightly
+  -camera-auto-focus=0 # disable auto-focus
+
+User=nobody
+Group=nogroup
+SupplementaryGroups=video i2c
+Restart=always
+RestartSec=10
+Nice=10
+IOSchedulingClass=idle
+IOSchedulingPriority=7
+CPUWeight=20
+AllowedCPUs=1-2
+MemoryMax=250M
+
+[Install]
+WantedBy=multi-user.target
diff --git a/service/camera-streamer-usb-cam.service b/service/camera-streamer-usb-cam.service
new file mode 100644
index 0000000..e00f0ba
--- /dev/null
+++ b/service/camera-streamer-usb-cam.service
@@ -0,0 +1,28 @@
+[Unit]
+Description=camera-streamer web camera
+After=network.target
+
+[Service]
+ExecStart=/usr/local/bin/camera-streamer \
+  -camera-path=/dev/video0 \
+  -camera-format=JPEG \
+  -camera-width=1920 -camera-height=1080 \
+  -camera-fps=30 \
+  -camera-nbufs=2 \ # use two memory buffers to optimise usage
+  -camera-high_res_factor=1.0 \ # the high-res is 1920x1080
+  -camera-low_res_factor=2.0 # the low-res is 960x540
+
+User=nobody
+Group=nogroup
+SupplementaryGroups=video i2c
+Restart=always
+RestartSec=10
+Nice=10
+IOSchedulingClass=idle
+IOSchedulingPriority=7
+CPUWeight=20
+AllowedCPUs=1-2
+MemoryMax=250M
+
+[Install]
+WantedBy=multi-user.target