Relay On Time

[sprinkfitter]

I want to turn a relay on for a period of time. Can I just call millis

Code: Select all

if ds.DateTime() == (OnMin4, OnHour4, OnDay4, OnMonth4, OnYear4):
    relay1.value = 0  # HIGH
    millis(2000)
    print('Relay 1 ON')
    print(ds.DateTime)
    print(OnMin1, OnHour1, OnDay1, OnMonth1, OnYear1)
    
else:
    relay1.value = 1  # LOW
    print('Relay 1 OFF')

[Roberthh]

You can use utime.sleep_ms(sleep_time).

[sprinkfitter]

Seems a little odd sleep time to be use to keep a relay or pin on. So you can use the sleep for high and low pins??

[ThomasChr]

???

You turn the relay on. You let the uc sleep for a period of time. You turn the relay off.
What is odd here?

Yes, you can also use timers which have the benefit of letting your main code running and not sleeping, but sometimes you don't need to do anything in the sleep phase and so you can sleep...

[sprinkfitter]

Thanks that does work!!

[pythoncoder]

It seems to me that the above code will turn the relay on for one minute regardless of the delay. It turns on when minutes, day, month and year match. It turns off when they fail to match. If the code runs many times per minute, that will happen one minute later.

Or am I missing something?

[ThomasChr]

I don‘t think the code makes much sense at all...

[sprinkfitter]

Under construction... Trying to turn relay on and off a certain times of day! Very new to Micro-python.

Code: Select all

OnMin1 = arr.array([10, 20])  # Array Setup for triggering relay 1
OnHour1 = arr.array([8, 16])
OnDay1 = arr.array([1, 3, 5, 7, ])
OnMonth1 = arr.array([6, 7, 8, 9])
OnYear1 = arr.array([2019, 2020, 2021, 2022])

OnMin2 = arr.array([15, 30])  # Array Setup for triggering relay 2
OnHour2 = arr.array([9, 17])
OnDay2 = arr.array([17, 18, 19, 20])
OnMonth2 = arr.array([6, 7, 8, 9])
OnYear2 = arr.array([2019, 2020, 2021, 2022])

OnMin3 = arr.array([17, 18, 19, 20])  # Array Setup for triggering relay 3
OnHour3 = arr.array([17, 18, 19, 20])
OnDay3 = arr.array([17, 18, 19, 20])
OnMonth3 = arr.array([6, 7, 8, 9])
OnYear3 = arr.array([2019, 2020, 2021, 2022])

OnMin4 = arr.array([17, 18, 19, 20])  # Array Setup for triggering relay 4
OnHour4 = arr.array([17, 18, 19, 20])
OnDay4 = arr.array([17, 18, 19, 20])
OnMonth4 = arr.array([6, 7, 8, 9])
OnYear4 = arr.array([2019, 2020, 2021, 2022])

if ds.DateTime() == (OnMin4, OnHour4, OnDay4, OnMonth4, OnYear4):
    relay1.value = 0  # HIGH
    utime.sleep_ms(10000)
    print('Relay 1 ON')
    print(ds.DateTime)
    print(OnMin1, OnHour1, OnDay1, OnMonth1, OnYear1)

else:
    relay1.value = 1  # LOW
    print('Relay 1 OFF')

[sprinkfitter]

Mr.pythoncoder now I do not want to do that. What I want to do is turn a relay on at a certain time let it stay on for the delay and then turn off?

[ThomasChr]

What about:

Code: Select all

while True:
    relay1.on()
    time.sleep(10000)
    relay1.off()
    time.sleep(10000)

This will turn the relay on for 10 seconds and off for 10 seconds endlessly...