Fixed the stage data.
lucidcode
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lucidcode 
It works!
Good work!
Had to make a few tweaks since the zeo raw waveform also goes negative and sleep stages are also negative values from Zeostream.cs (stageData[j].Values[0] = -(int)zeoMessage.SleepStage;)
For GetValueStage() return with a minus sign X 100 and array length 1
ChannelData[] channels = zeoStream.ReadStageDataFromLastPosition(ref stageLastPosition, 1);
return -channels[0].Values[0] * 100;
For GetValueEEG() allow upto negative 999 X 1000 ( since values are in 0 to 1 range)
ChannelData[] channels = zeoStream.ReadEegFromLastPosition(ref eegLastPosition, 1);
return channels[0].Values[0]*1000;
….
….
….
if (dblValue < -999) { dblValue = -999; }
Thanks! I merged your changes and added the code to trigger the Arduino in Zeo 0.9.6. Please let me know if it works…