Robinson R22 Data Ref Problem

[Steelwings 0]

I hope someone here can help me out. I wish to set up a phidget 64LED board for annunciator warnings. Most have gone OK so far but I can't seem to find a data ref that controls the "Rotor Brake ON" LED or the corresponding output data set through the UDP settings. Also, I can't seem to find the UDP setting that corresponds to the "sim/cockpit2/annunciators/low_rotor" data ref. I thought it might use the data points from the prop rpms but I can't seem to get it to work.( I am using the Simplugins plug-in that used the UDP settings to communicate with the phidget board) I am new at most of this so please forgive me for my noobiness. Any help would be greatly appreciated!

[GoranM 3,764]

"sim/cockpit2/switches/rotor_brake"