diff --git a/packages/connect-examples/expo-example/src/components/DeviceList.tsx b/packages/connect-examples/expo-example/src/components/DeviceList.tsx
index d78ed00fa..a789675bf 100644
--- a/packages/connect-examples/expo-example/src/components/DeviceList.tsx
+++ b/packages/connect-examples/expo-example/src/components/DeviceList.tsx
@@ -80,7 +80,7 @@ const Item = ({ item, onPress, connected }: ItemProps) => {
 };
 
 type IDeviceListProps = {
-  onSelected: (device: Device) => void;
+  onSelected: (device: Device | undefined) => void;
   disableSaveDevice?: boolean;
 };
 export interface IDeviceListInstance {
@@ -108,15 +108,16 @@ function DeviceListFC(
   }, []);
 
   const selectDevice = useCallback(
-    (device: Device) => {
-      setSelectedId(device.connectId);
-      storeSelectedId(device.connectId);
+    (device: Device | undefined) => {
+      setSelectedId(device?.connectId ?? '');
+      storeSelectedId(device?.connectId ?? '');
       onSelected(device);
     },
     [onSelected]
   );
 
   const searchDevices = useCallback(async () => {
+    selectDevice(undefined);
     if (!sdk) return alert(intl.formatMessage({ id: 'tip__sdk_not_ready' }));
 
     const response = await sdk.searchDevices();
diff --git a/packages/connect-examples/expo-example/src/views/FirmwareScreen/index.tsx b/packages/connect-examples/expo-example/src/views/FirmwareScreen/index.tsx
index 79f33987d..eb9791abc 100644
--- a/packages/connect-examples/expo-example/src/views/FirmwareScreen/index.tsx
+++ b/packages/connect-examples/expo-example/src/views/FirmwareScreen/index.tsx
@@ -110,7 +110,7 @@ function FirmwareLocalFile({ title, type, onUpdate }: FirmwareLocalFileProps) {
 }
 
 interface FirmwareUpdateProps {
-  selectDevice: Device | null;
+  selectDevice: Device | undefined;
   onReconnectDevice: () => void;
   onDisconnectDevice: () => void;
 }
@@ -150,7 +150,12 @@ function FirmwareUpdate({
 
   useEffect(() => {
     if (!sdk) return;
-    if (selectDevice?.connectId == null && selectDevice?.features == null) return;
+    if (selectDevice?.connectId == null || selectDevice?.features == null) {
+      setFeatures(undefined);
+      setOnekeyFeatures(undefined);
+      return;
+    }
+
     setConnecting(true);
     setFeatures(undefined);
     sdk
@@ -393,7 +398,7 @@ function FirmwareUpdate({
 }
 
 export default function FirmwareScreen() {
-  const [selectedDevice, setSelectedDevice] = useState<Device | null>(null);
+  const [selectedDevice, setSelectedDevice] = useState<Device | undefined>(undefined);
   const deviceListInstanceRef = useRef<IDeviceListInstance>(null);
 
   return (
@@ -402,9 +407,8 @@ export default function FirmwareScreen() {
         <DeviceList ref={deviceListInstanceRef} onSelected={setSelectedDevice} disableSaveDevice />
         <FirmwareUpdate
           selectDevice={selectedDevice}
-          onDisconnectDevice={() => setSelectedDevice(null)}
+          onDisconnectDevice={() => setSelectedDevice(undefined)}
           onReconnectDevice={() => {
-            setSelectedDevice(null);
             deviceListInstanceRef.current?.searchDevices();
           }}
         />