How to use Thread() ?

[deanhystad]

No, what I am saying is that none of this code executes inside the thread.

    if led_off1==False and GPIO.input(senseur_Del2)==1:
                        thread = Thread(target=ent.delai, args=())   <-----maybe at the wrong place or stop at the wrong time
                        thread.start()
                        GPIO.output(DEL1,True)
                        time.sleep(.2)  # Not in a thread
                        GPIO.output(DEL1,False)
                        time.sleep(.2)  # Not in a thread
                        led_off2=True   # Should this be led_off1 == True?
                        sleep(.5)   # Not in  a thread

This may only be 0.9 seconds of delay, but it happens continuously as long as GPIO.input(senseur_Del1) == 1.

And you have a bunch of other waits that don't happen inside the thread.