You can download the latest version (2.0.22) of NEST Home 1, 2 & 3 from these addresses:
NEST Home - https://www.dropbox.com/s/b5f3551atgijqt5/NEST%20Home.zip?dl=1
NEST Home 2 - https://www.dropbox.com/s/erho03w3dce92n3/NEST%20Home%202.zip?dl=0
NEST Home 3 - https://www.dropbox.com/s/hz9t2emjeqi9pdw/NEST%20Home%203.zip?dl=0
In this release you will find:
U07 - I would like a trigger that tells me when the ambient temperature is within x degrees of the CoolSetpoint, HeatSetPoint or TargetSetpoint (for users who only have heat or cool systems not combined)
This version enables the user to set a differential value in the NEST Home configuration dialog. By default it's set to 5 degrees (F or C depending on your NEST Settings).
NEST Home now maintains three trigger states:
coolpointTrigger - for HVAC systems. Set to true if the ambient temperature is +/- degrees differential (set in configuration screen) of the current cool setpoint otherwise false
heatpointTrigger - for HVAC systems. Set to true if the ambient temperature is +/- degrees differential (set in configuration screen) of the current heat setpoint otherwise false
targetTrigger - for heating or cooling systems. Set to true if the ambient temperature is +/- degrees differential (set in configuration screen) of the target temperature otherwise false
You can update your NEST Home in the usual way. The state of the trigger variables is calculated on each NEST update cycle and may take a few seconds to update initially. The triggers will remain blank until the calculation is completed for the first time.