Hi mueller-ma,
this is the app log from settings:
Device information
Model: 21081111RG
Manufacturer: Xiaomi
Brand: Xiaomi
Device: amber
Product: amber_eea
OS: 11
Display: 1080x2186, 2.75 density
Data usage policy: DataUsagePolicy(canDoLargeTransfers=true, loadIconsWithState=true, autoPlayVideos=true, canDoRefreshes=true), data saver: 1, battery saver: false
--------- beginning of events
03-22 07:47:04.068 10751 10751 I menu_item_selected: [0,Protokoll löschen]
--------- beginning of main
03-22 07:47:05.964 10751 10751 D LogActivity: onOptionsItemSelected()
03-22 07:47:05.967 10751 10751 I wm_on_top_resumed_lost_called: [14959573,org.openhab.habdroid.ui.LogActivity,topStateChangedWhenResumed]
03-22 07:47:05.968 10751 10751 I wm_on_paused_called: [0,org.openhab.habdroid.ui.LogActivity,performPause,0]
03-22 07:47:05.971 10751 10751 I wm_on_restart_called: [0,org.openhab.habdroid.ui.PreferencesActivity,performRestartActivity,0]
03-22 07:47:05.972 10751 10751 D ServerConfiguration: load: ServerConfiguration(id=1, name=openHAB, localPath=ServerPath(url=https://:9443/, userName=, password=), remotePath=ServerPath(url=https://myopenhab.org/, userName=, password=), sslClientCert=null, defaultSitemap=DefaultSitemap(name=uicomponents_page_3e49d3534a, label=NoHome), wifiSsids=[])
03-22 07:47:05.973 10751 10751 I wm_on_start_called: [0,org.openhab.habdroid.ui.PreferencesActivity,handleStartActivity,1]
03-22 07:47:05.973 10751 10751 V PhoneWindow: DecorView setVisiblity: visibility = 0, Parent = android.view.ViewRootImpl@f2852ff, this = DecorView@5ad4c21[PreferencesActivity]
03-22 07:47:05.973 10751 10751 I wm_on_resume_called: [0,org.openhab.habdroid.ui.PreferencesActivity,RESUME_ACTIVITY,0]
03-22 07:47:05.973 10751 10751 I wm_on_top_resumed_gained_called: [179316519,org.openhab.habdroid.ui.PreferencesActivity,topWhenResuming]
03-22 07:47:05.973 10751 10751 V PhoneWindow: DecorView setVisiblity: visibility = 0, Parent = android.view.ViewRootImpl@f2852ff, this = DecorView@5ad4c21[PreferencesActivity]
03-22 07:47:05.974 10751 32603 I okhttp.OkHttpClient: → GET https://myopenhab.org/api/v1/settings/notifications
03-22 07:47:05.974 10751 32603 I okhttp.OkHttpClient: User-Agent: Mozilla/5.0 (Linux; Android 4.0.4; Galaxy Nexus Build/IMM76B) AppleWebKit/535.19 (KHTML, like Gecko) Chrome/18.0.1025.133 Mobile Safari/535.19
03-22 07:47:05.974 10751 32603 I okhttp.OkHttpClient: Cache-Control: no-cache
03-22 07:47:05.974 10751 32603 I okhttp.OkHttpClient: → END GET
03-22 07:47:05.974 10751 7007 D ConnectionFactory: checkAvailableConnection: found types [ConnectionType(type = Wifi, network=435)]
03-22 07:47:05.974 10751 7007 D AbstractConnection: Checking reachability of https://:9443/ (via 435)
03-22 07:47:05.975 10751 7007 I System.out: [socket]:check permission begin!
03-22 07:47:05.979 10751 7007 D AbstractConnection: Socket connected (attempt 0)
03-22 07:47:05.980 10751 7007 D ConnectionFactory: Connecting to local URL via ConnectionType(type = Wifi, network=435)
03-22 07:47:06.005 10751 10751 I wm_on_stop_called: [0,org.openhab.habdroid.ui.LogActivity,LIFECYCLER_STOP_ACTIVITY,0]
03-22 07:47:06.005 10751 10751 V PhoneWindow: DecorView setVisiblity: visibility = 4, Parent = android.view.ViewRootImpl@7d52b56, this = DecorView@161c6fb[LogActivity]
03-22 07:47:06.005 10751 10751 I wm_on_destroy_called: [0,org.openhab.habdroid.ui.LogActivity,performDestroy,0]
03-22 07:47:06.006 10751 10751 D View : [Warning] assignParent to null: this = DecorView@161c6fb[LogActivity]
03-22 07:47:06.009 10751 10751 I InputTransport: Destroy ARC handle: 0xb4000071341d90c0
03-22 07:47:06.101 10751 32603 I okhttp.OkHttpClient: ← 200 OK https://myopenhab.org/api/v1/settings/notifications (127ms)
03-22 07:47:06.101 10751 32603 I okhttp.OkHttpClient: Server: nginx/1.18.0 (Ubuntu)
03-22 07:47:06.101 10751 32603 I okhttp.OkHttpClient: Date: Tue, 22 Mar 2022 06:47:07 GMT
03-22 07:47:06.101 10751 32603 I okhttp.OkHttpClient: Content-Type: application/json; charset=utf-8
03-22 07:47:06.101 10751 32603 I okhttp.OkHttpClient: Content-Length: 35
03-22 07:47:06.101 10751 32603 I okhttp.OkHttpClient: Connection: keep-alive
03-22 07:47:06.101 10751 32603 I okhttp.OkHttpClient: X-Powered-By: Express
03-22 07:47:06.101 10751 32603 I okhttp.OkHttpClient: ETag: W/“23-/xrOAw4kk/UMX+JDa+0r4GFH8rY”
03-22 07:47:06.101 10751 32603 I okhttp.OkHttpClient: Set-Cookie: ██
03-22 07:47:06.101 10751 32603 I okhttp.OkHttpClient: ← END HTTP
03-22 07:47:06.109 10751 7007 D FcmRegistrationWorker: Run with action org.openhab.habdroid.action.REGISTER_GCM
03-22 07:47:06.110 10751 7007 D FcmRegistrationWorker: Register device at openHAB-cloud with URL: addAndroidRegistration
I cleared it before trying to write the tag and I enabled the extended logs. But I cannot find any message regarding the NFC tag.
The Android versions of the devices I tried are 9, 10 and 11.