diff --git a/mobile/android/app/src/main/res/mipmap-hdpi/ic_launcher.png b/mobile/android/app/src/main/res/mipmap-hdpi/ic_launcher.png
index db77bb4..2ee8b5c 100644
Binary files a/mobile/android/app/src/main/res/mipmap-hdpi/ic_launcher.png and b/mobile/android/app/src/main/res/mipmap-hdpi/ic_launcher.png differ
diff --git a/mobile/android/app/src/main/res/mipmap-mdpi/ic_launcher.png b/mobile/android/app/src/main/res/mipmap-mdpi/ic_launcher.png
index 17987b7..f9d0f2b 100644
Binary files a/mobile/android/app/src/main/res/mipmap-mdpi/ic_launcher.png and b/mobile/android/app/src/main/res/mipmap-mdpi/ic_launcher.png differ
diff --git a/mobile/android/app/src/main/res/mipmap-xhdpi/ic_launcher.png b/mobile/android/app/src/main/res/mipmap-xhdpi/ic_launcher.png
index 09d4391..ce4c428 100644
Binary files a/mobile/android/app/src/main/res/mipmap-xhdpi/ic_launcher.png and b/mobile/android/app/src/main/res/mipmap-xhdpi/ic_launcher.png differ
diff --git a/mobile/android/app/src/main/res/mipmap-xxhdpi/ic_launcher.png b/mobile/android/app/src/main/res/mipmap-xxhdpi/ic_launcher.png
index d5f1c8d..ae9f211 100644
Binary files a/mobile/android/app/src/main/res/mipmap-xxhdpi/ic_launcher.png and b/mobile/android/app/src/main/res/mipmap-xxhdpi/ic_launcher.png differ
diff --git a/mobile/android/app/src/main/res/mipmap-xxxhdpi/ic_launcher.png b/mobile/android/app/src/main/res/mipmap-xxxhdpi/ic_launcher.png
index 4d6372e..cb02c95 100644
Binary files a/mobile/android/app/src/main/res/mipmap-xxxhdpi/ic_launcher.png and b/mobile/android/app/src/main/res/mipmap-xxxhdpi/ic_launcher.png differ
diff --git a/mobile/lib/main.dart b/mobile/lib/main.dart
index 40e51ad..8662957 100644
--- a/mobile/lib/main.dart
+++ b/mobile/lib/main.dart
@@ -45,6 +45,7 @@ class MyHomePage extends StatefulWidget {
 
 class _MyHomePageState extends State<MyHomePage> {
   final _barcodeScanner = BarcodeScanner(formats: [BarcodeFormat.qrCode]);
+//  late final AnalysisController _scannerController;
   final _rxTextController = BehaviorSubject<String>();
   late final Stream<String> _rxTextStream = _rxTextController.stream;
 
@@ -53,6 +54,7 @@ class _MyHomePageState extends State<MyHomePage> {
   final HashSet<RaptorPacket> _rxData = HashSet();
   String _rxText = '';
   int _rxCount = 1;
+  int _bSize = 0;
 
   final _formatter = NumberFormat('###,###,###');
 
@@ -66,18 +68,19 @@ class _MyHomePageState extends State<MyHomePage> {
   Widget build(BuildContext context) {
     return Scaffold(
       body: CameraAwesomeBuilder.previewOnly(
+        zoom: 1.5,
         onImageForAnalysis: (img) => _processImageBarcode(img),
         imageAnalysisConfig: AnalysisConfig(
           androidOptions: const AndroidAnalysisOptions.nv21(
             width: 600,
           ),
           maxFramesPerSecond: 20,
-          autoStart: false,
+          autoStart: true,
         ),
         builder: (cameraModeState, previewSize, previewRect) {
+          //_scannerController = cameraModeState.analysisController!;
           return _RxTextDisplayWidget(
             rxTextStream: _rxTextStream,
-            analysisController: cameraModeState.analysisController!,
           );
         },
       ),
@@ -124,30 +127,42 @@ class _MyHomePageState extends State<MyHomePage> {
 
           case CuttleState.receiving:
             {
-              var txconf = await api.getTxConfig(bytes: dbytes);
-              if (txconf != null) {
-                await api.dropTxConfig(txc: txconf);
+              if (_bSize > 0 && dbytes.length < _bSize) {
                 continue;
               }
-              final packet = RaptorPacket(field0: dbytes);
-              _rxData.add(packet);
-              _rxCount += 1;
-              if (_rxCount % 40 == 0) {
-                _rxCount = 1;
-                final content = await api.decodePackets(
-                    packets: _rxData.toList(), txconf: _txConfig!);
-                if (content != null) {
-                  _rxData.clear();
-                  _barcodeScanner.close();
-                  _cuttleState = CuttleState.received;
-                  _rxTextController.add("DONE RECEIVING $_rxText");
-                  final f =
-                      await _saveReceivedFile(_txConfig!.filename, content);
-                  _rxTextController.add("Saved content to $f");
+              if (_bSize == 0) {
+                var txconf = await api.getTxConfig(bytes: dbytes);
+                if (txconf != null) {
+                  await api.dropTxConfig(txc: txconf);
                   continue;
                 }
               }
+              _bSize = dbytes.length;
+              final packet = RaptorPacket(field0: dbytes);
+              _rxData.add(packet);
+              _rxCount += 1;
               final bytesTotal = _rxData.length * dbytes.length;
+              if (_rxCount % 40 == 0) {
+                _rxCount = 1;
+
+                // if we've not received at least as many bytes as txconf.len,
+                // we cannot have enough bytes to reconstruct, so only try to
+                // decode if we've gotten at least that many
+                if (bytesTotal > _txConfig!.len) {
+                  final content = await api.decodePackets(
+                      packets: _rxData.toList(), txconf: _txConfig!);
+                  if (content != null) {
+                    _rxData.clear();
+                    _barcodeScanner.close();
+                    _cuttleState = CuttleState.received;
+                    _rxTextController.add("DONE RECEIVING $_rxText");
+                    final f =
+                        await _saveReceivedFile(_txConfig!.filename, content);
+                    _rxTextController.add("Saved content to $f");
+                    continue;
+                  }
+                }
+              }
               final pct = (100.0 * bytesTotal / _txConfig!.len).floor();
               _rxTextController.add(
                   "$_rxText -- $pct% received (${_formatter.format(bytesTotal)} bytes)");
@@ -176,13 +191,10 @@ class _MyHomePageState extends State<MyHomePage> {
 class _RxTextDisplayWidget extends StatefulWidget {
   final Stream<String> rxTextStream;
 
-  final AnalysisController analysisController;
-
   const _RxTextDisplayWidget({
     // ignore: unused_element
     super.key,
     required this.rxTextStream,
-    required this.analysisController,
   });
 
   @override
@@ -199,24 +211,6 @@ class _RxTextDisplayWidgetState extends State<_RxTextDisplayWidget> {
           color: Colors.white,
         ),
         child: Column(mainAxisSize: MainAxisSize.min, children: [
-          Material(
-            color: Colors.transparent,
-            child: CheckboxListTile(
-              value: widget.analysisController.enabled,
-              onChanged: (newValue) async {
-                if (widget.analysisController.enabled == true) {
-                  await widget.analysisController.stop();
-                } else {
-                  await widget.analysisController.start();
-                }
-                setState(() {});
-              },
-              title: const Text(
-                "Enable barcode scan",
-                style: TextStyle(fontWeight: FontWeight.bold),
-              ),
-            ),
-          ),
           Container(
             height: 120,
             padding: const EdgeInsets.symmetric(horizontal: 16),