Merge pull request 'fix: live progress display + better disconnect resilience' (#11) from schwifty/fix-progress-and-reconnect into main

- Wire provisioner.progress into assignment sheet UI (was showing static
  "Provisioning beacon..." instead of live updates like "Connecting...",
  "Authenticating...", "Writing config 1/24...")
- Increase disconnect retries from 2 to 3 with longer backoff (3s/4s/5s)
- Cancel write timeout timer on disconnect to prevent double-failure
- Bump global timeout from 30s to 45s for extra retry headroom
- Improve error message with actionable guidance ("move closer and retry")

PayfritBeacon/BeaconProvisioner.swift

@@ -182,7 +182,7 @@ class BeaconProvisioner: NSObject, ObservableObject {
     private var disconnectRetryCount = 0
     private static let MAX_CONNECTION_RETRIES = 3
     private static let MAX_DEVICE_INFO_RETRIES = 2
-    private static let MAX_DISCONNECT_RETRIES = 2
+    private static let MAX_DISCONNECT_RETRIES = 3
     private var currentBeacon: DiscoveredBeacon?
 
     // Per-write timeout (matches Android's 5-second per-write timeout)
@@ -241,8 +241,8 @@ class BeaconProvisioner: NSObject, ObservableObject {
 
         centralManager.connect(resolvedPeripheral, options: nil)
 
-        // Timeout after 30 seconds
-        DispatchQueue.main.asyncAfter(deadline: .now() + 30) { [weak self] in
+        // Timeout after 45 seconds (increased from 30s to accommodate 3 disconnect retries with backoff)
+        DispatchQueue.main.asyncAfter(deadline: .now() + 45) { [weak self] in
             if self?.state != .success && self?.state != .idle {
                 self?.fail("Connection timeout", code: .connectionTimeout)
             }
@@ -1114,6 +1114,9 @@ extension BeaconProvisioner: CBCentralManagerDelegate {
             return
         }
 
+        // Cancel any pending write timeout — disconnect supersedes it
+        cancelWriteTimeout()
+
         // Unexpected disconnect during any active provisioning phase — retry with full reconnect
         let isActivePhase = (state == .discoveringServices || state == .authenticating || state == .writing || state == .verifying)
         if isActivePhase && disconnectRetryCount < BeaconProvisioner.MAX_DISCONNECT_RETRIES {
@@ -1131,7 +1134,7 @@ extension BeaconProvisioner: CBCentralManagerDelegate {
             responseBuffer.removeAll()
             state = .connecting
 
-            let delay = Double(disconnectRetryCount) + 1.0  // 2s, 3s backoff
+            let delay = Double(disconnectRetryCount) + 2.0  // 3s, 4s, 5s backoff — give BLE time to settle
             DispatchQueue.main.asyncAfter(deadline: .now() + delay) { [weak self] in
                 guard let self = self, let beacon = self.currentBeacon else { return }
                 guard self.state == .connecting else { return }
@@ -1145,7 +1148,7 @@ extension BeaconProvisioner: CBCentralManagerDelegate {
 
         // All retries exhausted or disconnect in unexpected state — fail
         DebugLog.shared.log("BLE: UNEXPECTED disconnect — state=\(state) writeIdx=\(dxSmartWriteIndex) queueCount=\(dxSmartCommandQueue.count) authenticated=\(dxSmartAuthenticated) disconnectRetries=\(disconnectRetryCount)")
-        fail("Unexpected disconnect (state: \(state))", code: .disconnected)
+        fail("Beacon disconnected \(disconnectRetryCount + 1) times during \(state). Move closer to the beacon and try again.", code: .disconnected)
     }
 }
 

PayfritBeacon/ScanView.swift

@@ -385,11 +385,11 @@ struct ScanView: View {
                             .font(.title3)
                     }
 
-                    // Provisioning progress
+                    // Provisioning progress — show live updates from provisioner
                     if isProvisioning {
                         HStack {
                             ProgressView()
-                            Text(provisioningProgress)
+                            Text(provisioner.progress.isEmpty ? provisioningProgress : provisioner.progress)
                                 .font(.callout)
                         }
                         .padding()