Auto-detach usblp kernel driver before claiming the Datamax USB interface

app.rb

@@ -99,6 +99,7 @@ helpers do
     end
 
     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)
       end