a Real time Clock, a computer clock.

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2
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3answers
88 views

Real Time Clock Module Will it fry my pi?

I bought this RTC module on ebay for pennies. I initially bought it for the arduino but now I would like to use it with the pi. However, I know that in some cases you need logic level converters to ...
0
votes
1answer
30 views

Is there a way to connect an I2C RTC using pins 17,19,21,23,25?

I've been looking at I2C RTC modules like this one, but they all appear to be normally connected to pins 1,3,5,7,9. However, I'd also like to try to use a RaZberry Z-wave module on the same Rasberry ...
0
votes
2answers
57 views

Using I2C in C++ on Raspberry Pi

I have a Raspberry Pi model B with Raspbian and a Busware SD0 cape. The SD0 has an RTC that can be read via the I2C bus. I want set the time and date of the Raspberry Pi because it is not always ...
1
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0answers
35 views

Retrieve RTC time from DVB-C

I'm using my Pi as a media center and video recorder from cable. I will now for some time have to use the Pi without internet and therefore without timeservers. But as far as I know the DVB-C signal ...
0
votes
2answers
205 views

Rasclock does not store the time

I just received my Rasclock V4, and set it up according to Afterthought's instructions. Seeing as I'm doing this on a RPi B+, with the latest raspbian image downloaded from raspberrypi.org just ...
1
vote
1answer
47 views

Stackable real time clock?

I'm using Pibrella on my Pi (Model B+) and now I need RTC functionality. Are there stackable RTC modules that you know of? Any help is greatly appreciated. Regards, Kevin
1
vote
1answer
96 views

Raspberry Pi with gertduino to use the rtc

I just setup my raspberry pi with the gertduino and I tried the given blink example. It works fine and now I wanted to use the rtc from the gertduino to set the time from the raspberry. How ever I ...
0
votes
0answers
279 views

Why is my RTC DS1307 not being recognized?

I'm trying to wire up a DS1307 RTC to my Model B Pi. I'm following the diagram as shown in this crude image and I've also tried it like this but it isn't recognized by the Pi. When I run i2cdetect ...
1
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0answers
129 views

Should I remove fake-hwclock because my i2c RTC isn't always plugged in?

I have a i2c RTC (rtc-pcf8563) that runs great, but I don't always have it plugged in; is there a way to test to see if the RTC is plugged in and, if not, start fake-hwclock or will I have to dpkg ...
0
votes
2answers
176 views

Connecting RTC DS1037, Pin 5 already occupied

I think of adding a RTC Module to my Raspberry Pi. I found the following tutorial. http://www.forum-raspberrypi.de/Thread-tutorial-realtime-clock-rtc-ds1307-am-raspberry-pi-betreiben In general it's ...
0
votes
2answers
2k views

How to connect DS1307 5V Real time clock (RTC) to 3.3V?

I have DS1307 small SMD parts so I can't simply leave out the resistors easily to make it work with 3.3V by default as with adafruit kit tutorial. How could I connect this device to my Raspberry Pi ...
5
votes
1answer
998 views

Would it be possible to use the DS1302 made for Arduino?

I got some spare DS1302 chips that I'd like to connect to my Raspberry Pi to use as a RTC, but I'm not so sure how to. How would I go about it?
0
votes
1answer
265 views

Raspbian Kernel panic after RTC module .ko - How to unload modules at boot time?

I am playing with the RasClock RTC module. After baking my own rtc-pcf2127a.ko, and following the tutorial from the website, I got a kernel panic when booting (Null pointer etc.) Could not find any ...
0
votes
1answer
213 views

LCD with RTC and GPS

I have purchased a LCD board, a real time clock board, and a GPS board. I have soldered the LCD onto the breakout board as instructed and put the realtime clock together following the tutorials. At ...
3
votes
4answers
5k views

How can I automatically update the hwclock with NTP when I have internet connection

I'm using an RPi with Raspbian which runs the NTP-daemon by default. I have connected an rtc-ds1307 external i2c hardware clock. I was following the instructions given here to set it up: ...
1
vote
1answer
3k views

What does UU mean for RasClock

I acquired a RasClock made by After Thought Software (http://afterthoughtsoftware.com/products/rasclock) . This is a real time clock using i2c. I wanted to play with its other features via i2c but ...
8
votes
3answers
2k views

How does Pi keep track of time interval?

As I understand RTC is needed to keep track of time. However, Raspberry Pi does not have that and use NTP servers to synchronize its time. All that is fine, but how does Pi know that one millisecond ...
0
votes
1answer
193 views

Determining if network time has been set [duplicate]

I want to add a h/w rtc to my RPi. If network time is available, I want to determine this, and use it to set the system time and also update my own rtc. How can I find if network time is ( or becomes ...
-1
votes
1answer
1k 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 ...