From 334e3367272d29245dce22a382be4b02cdca206e Mon Sep 17 00:00:00 2001
From: Gordon Williams <gw@pur3.co.uk>
Date: Thu, 11 Jan 2024 09:27:17 +0000
Subject: [PATCH] If DFU update fails but we're not using any delay between
 sending packets, try again but with a delay.

This fixes an issue with *some* Windows 11 PCs where a DFU update would fail on the first 4096 byte block

Fix #80
---
 src/secure-dfu.ts | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/src/secure-dfu.ts b/src/secure-dfu.ts
index 6947423..210b194 100644
--- a/src/secure-dfu.ts
+++ b/src/secure-dfu.ts
@@ -548,7 +548,14 @@ export class SecureDfu extends EventDispatcher {
                     resolve(device);
                 });
             })
-            .catch(error => reject(error));
+            .catch(error => {
+                if (this.delay === 0) {
+                    this.log("DFU update failed, but delay=0. Trying again with delay=10...");
+                    this.delay = 10;
+                    return this.update(device, init, firmware);
+                }
+                reject(error);
+            });
         });
     }
 }