Download __EXCLUSIVE__ Alarm Wake Up

So I decided to do some digging thinking Smartthings should be able to do this for me and after looking at a few options that seemed clunky (as you mention in your own write-up) this seems idea. The fact that I can use the native alarm functionality on my android phone seals the deal for me.

I am trying to set RTC-alarm event to wake up an STM32F103C8T6 from sleep-mode (not standby, not stop) and it works once, but subsequent alarms never wake the MCU up. Nothing I've tried seems to work and I no longer have any idea how to fix this.

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Of note is that the RTC alarm must be cleared before clearing the NVIC interrupt pending. Swapping them around or expecting HAL_RTC_SetAlarm_IT() to clear the alarm won't work, the NVIC interrupt won't get cleared successfully until the alarm has first been cleared.

Thanks for using Apple Support Communities. It sounds like you have some questions about using Sleep on your dad's iPhone and setting up Bedtime. Have you checked your dad's sleep schedule to make sure it is correct? If it is, he may have mistakenly changed his next wake-up alarm. This is a one time change. See how to use the new sleep schedule and make one time changes here: Set up sleep schedules in Health on iPhone.

When setting up my Charge 2, it had me select a target sleep schedule and wake up tone. This created a wake-up alarm for the Wake up time on my iPhone. How do I turn this off? I've gone into my sleep goals and deleted the Sleep Goal, Target Sleep Schedule (including bedtime & wake up time), and turned off the bedtime reminder. The alarm is still going off every morning. There are no silent alarm settings, and I am not finding any alarm settings when reviewing phone settings for the FitBit app on 'allow fitbit to access' settings on the phone. Any assistance would be greatly appreciated.

In my case, I think I turned on the iOS bedtime alarm when I was going through what changed on the iOS update last fall, and then, because my wake up times were pretty close to what I already had set in the regular iOS alarms feature, forgot I had set it up and that it was there. I also set up the sleep feature in the fitbit app -- cause I REALLY need help getting up in the morning -- and then spent about a month trying figure out why I couldn't turn off my phone's wake up alarm even though I had deleted all the normal alarms and the fitbit sleep feature. It was just a case of too many ways to do basically the same thing.

Looking more closely at the fitbit's sleep reminder feature in the app, I see that it is designed to give you a phone reminder in addition to a wrist vibration at bedtime, but will only do the wrist vibration to wake you up in the morning. Personally, I've gone back to using iPhone regular alarm feature, as I tend to get up around the same time every day even when I go to bed too late.

Your iPhone has relatively new bedtime alarm (distinct from regular daily alarms; introduced last fall), that, if you are like me, you set up and forgot about. Go to the clock icon on your phone and check to see that you have not set that up. Screen shot below is from my iPad.

First of all, I welcome any suggestions of a better forum to post this issue on, but wasn't sure where chipsets would fall. I recently purchased several new ASRock Z690 based boards and also an Asus W680 based board. After installing Windows 11 Pro 22H2 I discovered a common problem with all of them regarding wake timers set by the OS- they are always late. But I don't just mean by a small fixed amount, the delay after the target wake time increases the longer that the system is asleep before the target wake time. For example, if I use Windows Task Scheduler to create a wakeup event 12 hours from now and put the system to sleep, it doesn't wake until 12 hours and roughly 7 minutes have elapsed, with 24 hours asleep being almost 15 minutes late, etc.

At first I figured it was a BIOS problem and sent a contact form to ASRock support, unfortunately they have not yet responded. Then I purchased the Asus Z680 based board, figuring I could at least get my DVR system working again since it was sometimes now missing 15 minutes of a half hour show since the Z690 'upgrade'. That's when I found that even this board was doing the same thing. I know those two companies are somewhat related, but now I'm not sure the problem is with BIOS. I only recently started a ticket with Asus for this issue.

It's my [limited] understanding that the OS would place a value for the next wake event in the PCH 'Wake Alarm Device Timer' registers sometime before the system goes into S3/S4. Assuming this value is correct, and of course the chipset is functioning properly, then system should wake at the proper time. But since it does not, and the same problem appears from two different manufactures, there must be some common thread.

I guess I'm hoping that someone with a better understanding than myself of how the OS would interact with the PCH to set this wake timer, and better where specifically to look to find out what's going wrong. I tried to search online to find anyone else experiencing this problem and was surprised to find nothing, considering that I now have 7 boards of three models and two manufacturers all doing the same thing.

I thought of Linux also, but as I recall I found that the rtc wake command actually uses the bios alarm, which seems to be different than this wake alarm in the Intel PCHs used by Windows. In bios, the actual wake time is stored in the registers, and when the RTC matches it the system then wakes up. With this Intel wake alarm register in the PCH though, the time difference until the next wake event is stored in the registers, which then count down until reaching zero, causing the system to wake.

I don't see the same 37 seconds/hour that you observed. I see an approximately 10 minute delay in a 24 hour period. I deduce this based on my Acronis backups waking up the PC at 2am and the creation date of the backup file being 2:10am on the NAS (which is itself awaken by a WOL script). That corresponds to 25 seconds per hour. It does seem to be proportional to the time since last wake, though. I updated the BIOS for both my Z690 and Z790 systems, at a few hours interval. One machine had the next day's backup 10 minutes late, and the the other (which I had updated a bit later) just 8 minutes.

How I arrived at the figure of 37 seconds was as follows: I would create a wake event using Windows task scheduler for some interval in the future, such as 6, 12, 24 hours from (now). I then put the board to sleep and waited for it to wake, getting the actual wake time from Windows event viewer (power troubleshooter). Sometimes something unknown would wake the board up before the target event and I'd have to start over again.

Are you sure your system is actually continuously asleep for the full 24 hours? You can view all the exact sleep and wake times as above- open Event Viewer and select Windows Logs->System in the left pane. Then select 'Filter Current Log' in the right pane and in the box that opens go to the drop down 'Event Source' and select Power-Troubleshooter.

1. Thanks. I see that ACPI Wake Alarm device on both my Z690 and Z790 systems. I don't see it on the AMD X570 system I'm typing this on right now. I wonder if there is a way to forcibly disable the device on the Intel systems and make Windows use an alternative method for the wake timers. Sadly, this can't be done through device manager.

I don't know why they had to change this either (if it ain't broke...). I actually used IDA to disassemble that driver, but honestly couldn't make heads nor tails of the result- too many relative [to what?] jumps and register addresses. Also found the detailed description of the alarm register and its functions in the Intel PCH data book, but there again not knowing where the value is coming from nor how to access it externally didn't really help either.

I'm pretty sure I actually tried manually removing that driver once (from outside of Windows) just to see what would happen. As I recall, the system just wouldn't wake for any scheduled events anymore, so another good indication that this ACPI Wake Alarm is indeed the culprit. Would certainly be nice though like you said if there were a way to revert to the previous method they used.

The build-in Alarm&Clock app will not wake up the computer when it's in sleep mode, unless you configure the task scheduler waking up your laptop at a certain time and start Alarm app for notification then.

Alarms clocks and I have a damaged relationship. Friends notice me wince every time I'm watching a movie and a character's alarm blares them awake with all of the subtlety and gentleness of an aircraft carrier slamming into the sun. And don't get me started about how, when I was a kid, my dad would wake me up for school by thrusting the window curtains open as if he were opening the Ark of the Covenant right in my face. Waking up to a sunrise alarm is, by stark contrast, downright pleasant. And if you're like most of us, you need more sleep. ff782bc1db