diff --git a/android/app/src/main/java/nl/eddydevink/sylda/MainActivity.kt b/android/app/src/main/java/nl/eddydevink/sylda/MainActivity.kt
index 87cb207..ee7f137 100644
--- a/android/app/src/main/java/nl/eddydevink/sylda/MainActivity.kt
+++ b/android/app/src/main/java/nl/eddydevink/sylda/MainActivity.kt
@@ -41,8 +41,9 @@ class MainActivity : AppCompatActivity(), BleCallbacks {
                 statusText.text = getString(R.string.status_connected)
                 setupRelayButton()
                 setupRelay2Button()
-                relay1Button.isEnabled = true
-                relay2Button.isEnabled = true
+                val isServer = PrefsHelper.getDeviceMode(this@MainActivity) == "server"
+                relay1Button.isEnabled = isServer
+                relay2Button.isEnabled = isServer
             }
             BleStatus.Disconnected -> {
                 statusText.text = getString(R.string.status_connecting)
@@ -107,6 +108,9 @@ class MainActivity : AppCompatActivity(), BleCallbacks {
         }
         setupRelayButton()
         setupRelay2Button()
+        val isServer = PrefsHelper.getDeviceMode(this) == "server"
+        relay1Button.isEnabled = isServer
+        relay2Button.isEnabled = isServer
     }
 
     @Deprecated("Deprecated in Java")