diff --git a/servapps/mbusd/cosmos-compose.json b/servapps/mbusd/cosmos-compose.json
index 47760327..f3a9e8ad 100644
--- a/servapps/mbusd/cosmos-compose.json
+++ b/servapps/mbusd/cosmos-compose.json
@@ -1,7 +1,19 @@
 {
   "cosmos-installer": {
-    "form": [
-      {
+    "form": [ 
+    {
+      "name": "baudrate",
+      "label": "Baudrate",
+      "initialValue": "/dev/ttyACM2",
+      "type": "select",
+      "options": [
+        ["/dev/ttyACM0", "/dev/ttyACM0 Serialport 0 (Coprocessor)"],
+        ["/dev/ttyACM1", "/dev/ttyACM1 Serialport 1 (KNX, RS485 or RS232)"],
+        ["/dev/ttyACM2", "/dev/ttyACM2 Serialport 2 (RS485 or RS232)"],
+        ["/dev/ttyACM3", "/dev/ttyACM3 Serialport 3 (RS485 or RS232)"]
+      ]
+    },
+    {
         "name": "baudrate",
         "label": "Baudrate",
         "initialValue": "9600",
@@ -58,7 +70,7 @@
       },
       "entrypoint": "/usr/bin/mbusd -S -d -L - -p /dev/ttyS0 -s {Context.baudrate} -m {Context.mode}",
       "devices": [
-        "/dev/ttyACM0:/dev/ttyS0:rwm"
+        "{Context.serialPort}:/dev/ttyS0:rwm"
       ],
       "volumes": [
         {