diff --git a/README.md b/README.md
index fc87404..a2baadd 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,6 @@
 # bmspy
 
-bmspy is a tool to get information from a xiaoxiang-type BMS system, using some sort of serial connection.
+bmspy is a tool to get information from a [xiaoxiang-type](https://www.lithiumbatterypcb.com/product/4s-or-3s-12v-li-ion-or-lifepo4-battery-smart-bms-with-bluetooth-function-uart-and-rs485-communication-with-60a-to-120a-constant-current/?attribute_specification-selection=4S+Lifepo4+120A+with+UART+and+RS485) BMS system, using some sort of serial connection.
 
 It can display the information as text, in JSON, or export the data continuously to a Prometheus exporter.
 
diff --git a/bmspy-server.service b/bmspy-server.service
index 159ebcc..60bc5ef 100644
--- a/bmspy-server.service
+++ b/bmspy-server.service
@@ -5,6 +5,7 @@ Description=Make BMS data available for consumers
 Type=exec
 # The full path of the git repo on your system
 WorkingDirectory=/usr/local/bmspy
+ExecStartPre=/usr/bin/install -d -onobody -gdialout -m770 /run/bmspy
 ExecStart=poetry run bmspy-server
 RestartSec=5
 Restart=on-failure