+## T55xx Downlink Protocol
+### Added
+- Added downlink reference mode option r <mode> [ 0 - (default) fixed bit, 1 - long leading, 2 - leading 0 and 3 - 1 of 4 ]
+Supported commands lf t55xx detect, read, write, bruteforce (with special r 4 to try all downlink modes) (mwalker33)
+
+