added mmdvm.timer and removed sleep from .service

Makefile

@@ -154,14 +154,16 @@ installmmdvm :
 	/bin/cp -f $(MMPATH)/MMDVMHost $(BINDIR)
 	/bin/cp -f $(MMPATH)/MMDVM.qn $(CFGDIR)
 	/bin/cp -f system/mmdvm.service $(SYSDIR)
-	systemctl enable mmdvm.service
+	/bin/cp -f system/mmdvm.timer $(SYSDIR)
+	systemctl enable mmdvm.timer
 	systemctl daemon-reload
 	systemctl start mmdvm.service
 
 uninstallmmdvm :
 	systemctl stop mmdvm.service
-	systemctl disable mmdvm.service
+	systemctl disable mmdvm.timer
 	/bin/rm -f $(SYSDIR)/mmdvm.service
+	/bin/rm -f $(SYSDIR)/mmdvm.timer
 	/bin/rm -f $(BINDIR)/MMDVMHost
 	/bin/rm -f $(CFGDIR)/MMDVM.qn
 	sudo systemctl daemon-reload

system/mmdvm.service

@@ -4,7 +4,6 @@ After=systemd-user-session.service
 
 [Service]
 Type=simple
-ExecStartPre=/bin/sleep 30
 ExecStart=/usr/local/bin/MMDVMHost /usr/local/etc/MMDVM.qn
 Restart=always
 

system/mmdvm.timer

@@ -0,0 +1,6 @@
+[Timer]
+OnStartupSec=30
+
+[Install]
+WantedBy=multi-user.target
+