Tagged Questions

The system clock controls timekeeping on a computer. The Raspberry Pi does not have a system clock, although it [may be possible to use an external device](http://raspberrypi.stackexchange.com/questions/266/how-can-i-keep-system-time) to keep time.

learn more… | top users | synonyms

1
vote
1answer
60 views

Raspberry Pi B+ CPU clock manipulation

Is it possible to manipulate rPi B+ with ArchLinux system clock, I need to slow it down because of power management purposes.
0
votes
1answer
230 views

How to set real time clock in Raspberry PI instead of setting fake clock

I would like to know how to set Real Time Clock instead of Fake Clock in Raspberry PI. Hope you guys could help me out with it as soon as possible, thanks in advance, guys.
1
vote
1answer
64 views

Under what conditions is the system clock running?

The Raspberry Pi has no battery powered hardware clock, so it needs to fetch time via NTP and store it via fake-hwclock to not start at 1970 again after a power-loss. When the device is running the ...
1
vote
2answers
129 views

When do I need accurate time via NTP?

The Raspberry Pi has no hardware clock so the OS has to fetch date and time everytime when it boots if one wants accurate time. Do I need accurate NTP time at all and what use cases require it? I'm ...
8
votes
3answers
341 views

Will RPi suffer from the Y2K38 bug?

Just out of curiosity, what will happen to RPis Model A and B on January 19, 2038 in 3:14:07 AM GMT? Are they affected by the Y2K38 bug?
2
votes
1answer
360 views

set system clock to value received from GPS

I've got a USB GPS receiver permanently attached to my raspberry pi. At boot time, I would like raspbian to wait until the GPS has a signal, then set the OS's time to whatever the GPS says. I've ...
3
votes
3answers
2k views

After reboot, my RPi is one hour off — How to adjust for Daylight Savings problems?

The electricity to my apartment went out a few days ago. I use my RPi to record data and store it in a database. I've just learned that the time for all my data has been off by an hour because the ...
2
votes
2answers
1k views

How to get the exact clock speed at the raspberry pi is running?

As per the specification. If you power the raspberry pi from the USB port from PC,It will run at half speed of what it can achieve. But when you power it from the external source then it runs at full ...
3
votes
4answers
572 views

Keeping System Time Without Network

Is there a way to sync the clock with the internet (as easily done) upon one startup, then shutdown, move the computer to another place WITHOUT an internet connection, and get a reasonable time? I'm ...
1
vote
2answers
387 views

Could the raspberry pi be used for stimulus presentation in psychological experiments?

I am a cognitive psychologist / neuroscientist. In a lot of the experiments that I run I have participants - mostly undergrads - sit at a computer and respond to certain combinations of visual ...
-1
votes
1answer
971 views

Configuring to read RTC at boot time

I have added an RTC to the I2C bus of the Raspberry Pi. If I follow the steps mentioned here (I am using the DS1307 RTC IC), I can run hwclock and read the time. root@raspberrypi:~# modprobe ...
11
votes
2answers
2k views

How accurate is Raspberry Pi's timekeeping?

I realize that since Raspberry Pi doesn't have a real-time clock built in, some issues with accurate timekeeping may present themselves, even when persistence across reboots is not a requirement. This ...
4
votes
2answers
226 views

System time coming through SSH?

I have a setup where my Pi is connected to power and to my router, and I then set up a connection with my laptop through SSH (a good setup for saving space, if you don't have a lot). I fired up my Pi ...
31
votes
4answers
28k views

How can I keep system time?

I know that Raspberry Pi does not come with a system clock to save money. How can I keep system time though?