app/models/extface/driver/daisy_fx1200.rb in extface-0.4.9 vs app/models/extface/driver/daisy_fx1200.rb in extface-0.5.0

@@ -246,10 +246,10 @@
     def frecv(timeout) # return RespFrame or nil
       rframe = nil
       BAD_SEQ_MAX_COUNT.times do
         if frame_bytes = pull(timeout)
           rframe = RespFrame.new(frame_bytes.b)
-          if rframe.seq.ord == sequence_number(false) #accept only current sequence number as reply
+          if rframe.seq.nil? || rframe.seq.ord == sequence_number(false) #accept only current sequence number as reply
             break
           else
             errors.add :base, "Sequence mismatch"
             rframe = nil #invalidate mismatch sequence frame for the last retry
           end
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