Piston: Design Help

What's wrong here? (5)

Piston for water re-circulation pump ( 2 ) (31)

Scheduled Piston Not Executing (11)

Help with my first piston! (6)

Replacing wu weather commands with twc commands, getting "can't find variable" errors (16)

Invalid Device Variable - Smartthings multi function sensor (6)

IFTTT Post Ingredients - Date/Time Problem (10)

Unlock on arrival with redundant presence sensors and door contact (17)

Parsing json from ComEd Hourly Pricing (8)

Presence and not presence triggers? (4)

Trying to Pass Device list between Pistons (2)

Can Edit Condition utilize a variable to represent a physical device On or Off State? (3)

Device Variables not showing custom functions (4)

Robust Architecture for entire house? (3)

Need help with SWITCH CASE and NULL (EMPTY) evaluation ( 2 ) (21)

Ikea 5 button remote and light control (4)

Using Global Variables for Device Lists (2)

Font Awesome characters (3)

This Piston Should work - Right? (17)

Turning my pool pump off (10)

Test for Device Unavailable (9)

Excessive Piston Logging (4)

There was a problem loading the dashboard data (8)

Voice Announcements and resume play but only if playing (4)

The real current ecobee temperature? (16)

On event from (with variable device) (12)

Trigger Piston with Alexa but not with a Virtual Switch (7)

Need help with multi-light dimming that works no matter current state (15)

Washing Machine notification if door does not open (6)

Detecting an error condition in a door lock (4)