From 4f640989bc09a71ee30a68984a8530b5b1f254e7 Mon Sep 17 00:00:00 2001
From: Taiki Komoda <komoda@jins.com>
Date: Sat, 9 May 2020 23:15:48 +0000
Subject: [PATCH] Fix #38 issue

---
 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 efc7332..495a5f2 100644
--- a/src/secure-dfu.ts
+++ b/src/secure-dfu.ts
@@ -294,7 +294,14 @@ export class SecureDfu extends EventDispatcher {
                 reject: reject
             };
 
-            characteristic.writeValue(value);
+            characteristic.writeValue(value)
+            .catch(e => {
+                this.log(e);
+                return Promise.resolve()
+                    .then(() => this.delayPromise(500))
+                    // Retry once
+                    .then(() => characteristic.writeValue(value));
+            });
         });
     }