diff --git a/debian/arduino-router/DEBIAN/postinst b/debian/arduino-router/DEBIAN/postinst
index cba8391..513bb85 100755
--- a/debian/arduino-router/DEBIAN/postinst
+++ b/debian/arduino-router/DEBIAN/postinst
@@ -1,5 +1,6 @@
 #!/bin/sh
 
-systemctl enable arduino-router
-systemctl enable arduino-router-serial
+systemctl enable arduino-router.service
+systemctl enable arduino-router-serial.service
+systemctl enable arduino-router-serial.path
 
diff --git a/debian/arduino-router/DEBIAN/prerm b/debian/arduino-router/DEBIAN/prerm
index 193d5be..4525de0 100755
--- a/debian/arduino-router/DEBIAN/prerm
+++ b/debian/arduino-router/DEBIAN/prerm
@@ -1,5 +1,6 @@
 #!/bin/sh
 
-systemctl disable arduino-router
-systemctl disable arduino-router-serial
+systemctl disable arduino-router.service
+systemctl disable arduino-router-serial.service
+systemctl disable arduino-router-serial.path
 
diff --git a/debian/arduino-router/etc/systemd/system/arduino-router-serial.path b/debian/arduino-router/etc/systemd/system/arduino-router-serial.path
new file mode 100644
index 0000000..e49ee7e
--- /dev/null
+++ b/debian/arduino-router/etc/systemd/system/arduino-router-serial.path
@@ -0,0 +1,8 @@
+[Unit]
+Description=Watch for /dev/ttyGS0 to start arduino-router-serial
+
+[Path]
+PathExists=/dev/ttyGS0
+
+[Install]
+WantedBy=multi-user.target
diff --git a/debian/arduino-router/etc/systemd/system/arduino-router-serial.service b/debian/arduino-router/etc/systemd/system/arduino-router-serial.service
index 59b127b..2895335 100644
--- a/debian/arduino-router/etc/systemd/system/arduino-router-serial.service
+++ b/debian/arduino-router/etc/systemd/system/arduino-router-serial.service
@@ -1,8 +1,9 @@
 [Unit]
 Description=Proxy for the Arduino Router Monitor to ttyGS0 serial
-After=network-online.target arduino-router.service
-Wants=network-online.target arduino-router.service
+After=network.target arduino-router.service
+Wants=network.target arduino-router.service
 Requires=arduino-router.service
+ConditionPathExists=/dev/ttyGS0
 
 [Service]
 ExecStart=/usr/bin/socat file:/dev/ttyGS0,raw,echo=0,b9600,crtscts=0 tcp:127.0.0.1:7500