Auto-off timer ruleset with warning blinks and re-up (for soldering iron, etc)

[inventhouse]

I wanted to set up some basic "smart plugs" as nice auto-off timers for my soldering iron and hot glue gun; there is a cookbook rule for a very basic version but I wanted a few extra things:

• Click button to turn on and start timeout
• Click to re-up the timeout at any time
• LED starts blinking when the time is almost up
• Hold button to turn off at any time

Here's what I've come up with; SetOption32 20 sets the button-hold threshold to 2s, Mem1 is the total timeout in seconds (1 hour), Mem2 is the warning time in seconds (5 mins.) Mem1 and Mem2 times can be changed and will get picked up when the timeout is (re)started.

SetOption32 20
Mem1 3600
Mem2 300

Rule1
  ON Var1#State=0 DO Backlog RuleTimer1 0; RuleTimer2 0; Power1 off; LedState 1 ENDON
  ON Var1#State=1 DO Backlog RuleTimer2 0; Power1 on; LedState 1; Var2 %Mem1%; Sub2 %Mem2%; Var1 2 ENDON
  ON Var1#State=2 DO RuleTimer1 %Var2% ENDON
  ON Var1#State>2 DO Backlog LedPower1 2; Mult1 1 ENDON

  ON Rules#Timer=1 DO Backlog RuleTimer2 %Mem2%; Var1 3 ENDON
  ON Rules#Timer=2 DO Var1 0 ENDON

  ON Button1#State<3 DO Var1 1 ENDON
  ON Button1#State=3 DO Var1 0 ENDON

Rule1 on

Breaking that down, I built a state machine:

• Var1=0 clears the timers, turns off power, and cleans up
• Var1=1 turns power on, does some setup, and goes to state 2. This split is needed because the %var% substitution appears to take place all at once; if we do math to put the right value in Var2, we can't use it in the same rule or we won't get the new value.
• Var1=2 starts the timeout-until-warning
• Var1>2 blinks the LED to warn that the time is almost up; Mult1 1 "updates" Var1 without changing it re-triggering the rule, but if something else changes it to a different state, any backlogged commands won't cause a problem. Be aware that this creates a lot of console activity and could bog down your device, though I haven't had any issues in my testing. Also note that the LedPower command needed for blinking also changes the LedState as a side-effect; some of the other rules try to clean this up, but I've hard-coded that to return to LedState 1

There are two timer handlers:

• When Timer=1 expires, start timer 2 for the remaining time and go to the blinking LED state
• When Timer=2 expires, the time is up, go to the power-off/cleanup state

And two button handlers:

• Button1<3 (button clicked but not held) goes to the power-on/setup state (which chains into the start-timer state)
• Button1=3 (button held) goes to the power-off/cleanup state

Happy to answer any questions, though I'm still super-new to Tasmota and just hacked this until it did what I wanted.