diff --git a/index.js b/index.js
index 579a738..964c304 100644
--- a/index.js
+++ b/index.js
@@ -36,8 +36,7 @@ app.whenReady().then(async () => {
   }
 
   // Show used arguments
-  const json = JSON.stringify(args, null, 2);
-  console.log(`Arguments: ${json}`);
+  console.log(`Arguments: ${JSON.stringify(args, null, 2)}`);
 
   // Chained init functions
   const chained = [webview.init, hardware.init, integration.init];
diff --git a/install.sh b/install.sh
index fc86d9c..58e0dde 100755
--- a/install.sh
+++ b/install.sh
@@ -3,6 +3,7 @@
 # Determine system architecture
 echo -e "Determining system architecture..."
 
+BITS=$(getconf LONG_BIT)
 case "$(uname -m)" in
     aarch64)
         ARCH="arm64"
@@ -11,11 +12,17 @@ case "$(uname -m)" in
         ARCH="x64"
         ;;
     *)
-        echo "System architecture $(uname -m) not supported."
+        echo "Architecture $(uname -m) running $BITS-bit operating system is not supported."
         exit 1
         ;;
 esac
-echo "System architecture $ARCH is supported."
+
+if [ "$BITS" -ne 64 ]; then
+    echo "Architecture $ARCH running $BITS-bit operating system is not supported."
+    exit 1
+fi
+
+echo "Architecture $ARCH running $BITS-bit operating system is supported."
 
 # Download the latest .deb package
 echo -e "\nDownloading the latest release..."
@@ -23,7 +30,9 @@ echo -e "\nDownloading the latest release..."
 DEB_URL=$(wget -qO- https://api.github.com/repos/leukipp/touchkio/releases/latest | \
 grep -o "\"browser_download_url\": \"[^\"]*_${ARCH}\.deb\"" | \
 sed 's/"browser_download_url": "//;s/"//g')
-DEB_PATH="/tmp/$(basename "$DEB_URL")"
+
+TMP_DIR=$(mktemp -d)
+DEB_PATH="${TMP_DIR}/$(basename "$DEB_URL")"
 
 if [ -z "$DEB_URL" ]; then
     echo "Download url for .deb file not found."
diff --git a/src/hardware.js b/src/hardware.js
index 3bcef1a..0d4a147 100644
--- a/src/hardware.js
+++ b/src/hardware.js
@@ -6,6 +6,7 @@ const process = require("child_process");
 global.HARDWARE = global.HARDWARE || {
   initialized: false,
   status: "invalid",
+  session: {},
   support: {},
   display: {
     status: {
@@ -32,29 +33,29 @@ global.HARDWARE = global.HARDWARE || {
  * @returns {boolean} Returns true if the initialization was successful.
  */
 const init = async (args) => {
-  if (!args.mqtt_url) {
-    return false;
-  }
-
-  // Check device support
   if (!compatibleDevice()) {
     console.warn("Device not supported");
     return false;
   }
 
   // Init globals
-  HARDWARE.support.session = sessionType();
+  HARDWARE.session.user = sessionUser();
+  HARDWARE.session.type = sessionType();
   HARDWARE.display.status.path = getDisplayStatusPath();
   HARDWARE.support.displayStatus = HARDWARE.display.status.path !== null;
   HARDWARE.display.brightness.path = getDisplayBrightnessPath();
   HARDWARE.support.displayBrightness = HARDWARE.display.brightness.path !== null;
   HARDWARE.display.brightness.max = getDisplayBrightnessMax();
+  HARDWARE.support.keyboardVisibility = processRuns("squeekboard");
   HARDWARE.initialized = true;
   HARDWARE.status = "valid";
 
+  // Show supported features
+  console.log(`Supported: ${JSON.stringify(HARDWARE.support, null, 2)}`);
+
   // Show session infos
-  console.log("\nUser:", os.userInfo().username);
-  console.log("Session:", HARDWARE.support.session);
+  console.log("\nUser:", HARDWARE.session.user);
+  console.log("Session:", HARDWARE.session.type);
 
   // Show device infos
   console.log("\nModel:", getModel());
@@ -73,8 +74,7 @@ const init = async (args) => {
   console.log(`\nDisplay Status [${HARDWARE.display.status.path}]:`, getDisplayStatus());
   console.log(`Display Brightness [${HARDWARE.display.brightness.path}]:`, getDisplayBrightness(), "\n");
 
-  // Check for keyboard visibility changes
-  HARDWARE.support.keyboardVisibility = processRuns("squeekboard");
+  // Check for keyboard visibility
   setKeyboardVisibility("OFF", (reply, error) => {
     if (!reply || error) {
       return;
@@ -143,9 +143,21 @@ const compatibleDevice = () => {
 };
 
 /**
- * Queries the session type for the logged in user.
+ * Gets the session user name using `os.userInfo()`.
  *
- * @returns {string} Returns session type 'x11'/'wayland' or null if an error occurs.
+ * @returns {string|null} Returns session user name or null if an error occurs.
+ */
+const sessionUser = () => {
+  try {
+    return os.userInfo().username;
+  } catch {}
+  return null;
+};
+
+/**
+ * Gets the session type for the user using `loginctl`.
+ *
+ * @returns {string|null} Returns session type 'x11'/'wayland' or null if an error occurs.
  */
 const sessionType = () => {
   if (!commandExists("loginctl")) {
@@ -164,7 +176,7 @@ const sessionType = () => {
  * @returns {bool} Returns true if the session matches the type.
  */
 const session = (type) => {
-  return HARDWARE.support.session == type;
+  return HARDWARE.session.type == type;
 };
 
 /**
@@ -350,7 +362,7 @@ const setDisplayStatus = (status, callback = null) => {
     if (typeof callback === "function") callback(null, "Not supported");
     return;
   }
-  if (status !== "ON" && status !== "OFF") {
+  if (!["ON", "OFF"].includes(status)) {
     console.error("Status must be 'ON' or 'OFF'");
     if (typeof callback === "function") callback(null, "Invalid status");
     return;
@@ -464,6 +476,11 @@ const setKeyboardVisibility = (visibility, callback = null) => {
     if (typeof callback === "function") callback(null, "Not supported");
     return;
   }
+  if (!["ON", "OFF"].includes(visibility)) {
+    console.error("Visibility must be 'ON' or 'OFF'");
+    if (typeof callback === "function") callback(null, "Invalid visibility");
+    return;
+  }
   const visible = visibility === "ON";
   HARDWARE.keyboard.visibility = visible;
   dbusCall("/sm/puri/OSK0", "SetVisible", [`boolean:${visible}`], callback);
diff --git a/src/integration.js b/src/integration.js
index 0af36b1..43173fa 100644
--- a/src/integration.js
+++ b/src/integration.js
@@ -17,6 +17,10 @@ const init = async (args) => {
   if (!args.mqtt_url) {
     return false;
   }
+  if (!/^mqtts?:\/\//.test(args.mqtt_url)) {
+    console.error("Please provide the '--mqtt-url' parameter with mqtt(s)");
+    return app.quit();
+  }
   const url = new URL(args.mqtt_url);
   const user = args.mqtt_user ? args.mqtt_user : null;
   const password = args.mqtt_password ? args.mqtt_password : null;
@@ -347,7 +351,7 @@ const initKeyboard = (client) => {
     unique_id: `${INTEGRATION.node}_keyboard`,
     command_topic: `${root}/set`,
     state_topic: `${root}/status`,
-    icon: "mdi:keyboard-close",
+    icon: "mdi:keyboard-close-outline",
     device: INTEGRATION.device,
   };
   client