Thanks a lot for link to http://techblog.vsza.hu/posts/Reverse_engineering_chinese_scope_with_USB.ht= ml It really seems to be the same protocol. --=20 Thanks & Regards, Wojtek --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .