From 3833452fa9e296604893503a66041b46866ff5b3 Mon Sep 17 00:00:00 2001
From: Roman Priesol <roman@priesol.net>
Date: Sat, 12 Sep 2026 16:58:44 +0200
Subject: [PATCH] Increase bulk_transfer timeout to 30s for large ZPL payloads
 over USB 1.1

---
 app.rb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/app.rb b/app.rb
index ec5eaba..48fe183 100644
--- a/app.rb
+++ b/app.rb
@@ -101,7 +101,7 @@ helpers do
     device.open do |handle|
       handle.auto_detach_kernel_driver = true # usblp kernel driver otherwise holds the interface
       handle.claim_interface(0) do
-        handle.bulk_transfer(endpoint: DATAMAX_ENDPOINT, dataOut: data)
+        handle.bulk_transfer(endpoint: DATAMAX_ENDPOINT, dataOut: data, timeout: 30_000) # USB 1.1, large ZPL payloads need more than the 1s default
       end
     end
   end