Random() always gives same value

[martenss]

Hi,

I am applying EibPC to automatically control my rollos.
They go down 30min after sunset and should go up randomly between 8.30 and 9am per following statement:
"if htime(8,convert(random(29u32),0)+30,00) and RolloAutomation then write("Alle rolluiken lange druk-3/1/20",RAUF) endif"

However, this results in Rollos going up always at the same time:

12/10/2010 8:56 EibPC "Alle rolluiken lange druk-3/1/20" Binärwert OFF Writing bc 00 00 19 14 e1 00 80 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
13/10/2010 8:56 EibPC "Alle rolluiken lange druk-3/1/20" Binärwert OFF Writing bc 00 00 19 14 e1 00 80 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
14/10/2010 8:56 EibPC "Alle rolluiken lange druk-3/1/20" Binärwert OFF Writing bc 00 00 19 14 e1 00 80 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
15/10/2010 8:56 EibPC "Alle rolluiken lange druk-3/1/20" Binärwert OFF Writing bc 00 00 19 14 e1 00 80 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

After a restart the calculated random time seems to differ, but is again fixed till next restart.
What is wrong with the random() function or with my implementation?

Thanks for your help.

Sammy

[enertegus]

Hi,
However, this results in Rollos going up always at the same time:
After a restart the calculated random time seems to differ, but is again fixed till next restart.
What is wrong with the random() function or with my implementation?
Sammy

Random itself is calculation it's value only at start of system, as you've observed it.

To get a random number each day you can code

[highlight=epc]
// Init with a random value
Random=convert(random(29u32),0)
// Dayly re-calculate a random value
if htime(0,0,0) then Random=convert(random(29u32),0) endif
if htime(8,Random+30,00) and RolloAutomation then write("Alle rolluiken lange druk-3/1/20",RAUF) endif
[/highlight]