Delay PowerOn after power outage if relay was previously on

[Daskshadow]

Hi everyone,
I'm using a Sonoff Dual R3 with Tasmota32 (14.5.0) to control two HID lamps for a terrarium. Unfortunately, after turning off, those lamps needing a 15min cooldown before they can be reignited.
Now I want to create a rule to reignite them 15min after a power outage but only if they were previously powered on.

I tried something like:

PowerOnState 3
Rule1
 ON Power1#Boot=1 DO Backlog Power1 0; RuleTimer1 900; PowerLock1 1 ENDON
 ON Rules#Timer=1 DO Backlog PowerLock1 0; Power1 1 ENDON

But this is resulting in a very short power cycle during statup, which I don't want because it could cause damage to the lamps.

I also tried with PowerOnState 0, but this will not trigger the rule because Power1#Boot is evaluated after PowerOnState and I couldn't find a trigger which is evaluated before PowerOnState.

Is there anyway to not activate the relay at startup but read out the relay state from before the power outage?

[Daskshadow]

Hey together,
I managed to get it working and want to share my solution. With the use of Mem1 I'm saving the last power state:

PowerOnState 0

Rule1
 ON Power1#state DO Mem1 %value% ENDON
 ON Time#Initialized DO if (MEM1==1) RuleTimer1 900; PowerLock1 1 endif ENDON
 ON Rules#Timer=1 DO Backlog PowerLock1 0; Power1 %mem1% ENDON

In addition I improved the rule to check the timers before power on the lamps and also go into PowerLock when the lamp was manually turned off:

PowerOnState 0
Mem16 900

Rule1
 ON Power1#state=0 DO Backlog0 PowerLock1 1; RuleTimer1 %mem16%; Mem2=UTCTIME+MEM16 ENDON
 ON Power1#state DO Mem1 %value% ENDON
 ON Time#Initialized DO if (MEM1==1) RuleTimer1 %mem16%; PowerLock1 1 elseif (MEM2<=UTCTIME) PowerLock1 0 else Var1=MEM2-UTCTIME; RuleTimer2 1 endif ENDON
 ON Rules#Timer=2 DO RuleTimer1 %var1% ENDON
 ON Rules#Timer=1 DO Backlog PowerLock1 0; event checktime=%time% ENDON
 ON event#checktime<%timer1% DO Mem1 0 ENDON
 ON event#checktime>=%timer2% DO Mem1 0 ENDON
 ON event#checktime DO Power1 %mem1% ENDON

I'm using Mem2 to save the time when PowerLock time is over for the unlikely case, that a power outage happens while PowerLock is still on, to restore the remaining PowerLock time after startup.
Also as RuleTimer1=MEM2-UTCTIME isn't working, I'm using Var1 to perform this calculation an assign this in a different step to the RuleTimer1.

A bit strange is, that sometimes during my tests the calculation Var1=MEM2-UTCTIME returned a higher value than Mem16, which means that somehow the device traveled back in time during the power outage. (I tested the rule on a power socket with an ESP8285, not sure yet if there is any difference to an ESP32)

[sfromis]

Using UTCTIME cannot work before Tasmota is initialized with real time, usually meaning after network connection to have NTP available for synchronizing real time.

And doing subtractions involving a valid UTCTIME cannot work well, as the subtraction will be done using single precision floating point, meaning precision up to around 7 digits, while UTCTIME is 10 digits.